This document contains a model question paper for class 10 physical science with 40 total marks. It is divided into 4 sections:
1) Section I contains 4 mark questions with detailed answers required (16 marks total). Example questions include chemical reactions of calcium oxide and hydrochloric acid, and the use of detergents.
2) Section II contains short answer questions worth 4 marks total.
3) Section III contains very short answer questions worth 6 marks total.
4) Section IV contains multiple choice questions worth 6 marks total. The final section provides a blueprint of the question distribution.
CBSE Science Paper | 10th Class | Mia Miaseomiamia
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CBSE10th Science Sample Question Paper 2019Miso Study
Misostudy offers you free CBSE10th Science Sample Question Paper 2019, These papers having most important questions that are specially designed for CBSE class 10 aspirants on the basis of latest exam pattern. Every question is solved by our expert faculty in this field.
CBSE Science Paper | 10th Class | Mia Miaseomiamia
Mia Mia is one of the best listing website for Science Classes in Mumbai. We are also known for our systematic listing of various IPCC, Science coaching for CBSE, Engineering and other courses in Mumbai. QLI is a class where each student is our priority. We are one of the best listing website for Science Classes in Mumbai.
CBSE10th Science Sample Question Paper 2019Miso Study
Misostudy offers you free CBSE10th Science Sample Question Paper 2019, These papers having most important questions that are specially designed for CBSE class 10 aspirants on the basis of latest exam pattern. Every question is solved by our expert faculty in this field.
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Sample paper of science for class 9 will help assess the preparation of the student and enable them to gain insights into their strength and weakness. Based on the same, students can plan their revision strategy accordingly.
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Sample paper of science for class 9 will help assess the preparation of the student and enable them to gain insights into their strength and weakness. Based on the same, students can plan their revision strategy accordingly.
Find the best class 10 science sample paper at Studymate that can help students to excel in their board exams. These study materials help students to improve their weaker areas in the aforementioned subject. Visit https://bit.ly/33h4Yxn
Chemistry 113 Practice Exam 4 Spring 2016 Directions on.docxchristinemaritza
Chemistry 113 Practice Exam 4 Spring 2016
Directions on actual Exam: The exam consists of 2 sections (Chemical Bonding and Geometry and IMFs. Each multiple choice question is worth 4.33 points. You are allowed to use a scientific (nonprogrammable) calculator, periodic table, and VSEPR Theory Table.
Useful information:
ΔH°rxn = Σn×D(bonds broken) - Σn×D(bonds formed)
where Σn represents the sum of the moles of a particular type of bond
D represents bond energy per mole of bond
Chemical Bonding and Geometry
1.
The Lewis dot symbol for the calcium ion is
A)
2+
B)
Ca
C)
2+
D)
Ca2+
E)
Ca
2.
The electron dot structure for AsCl3 molecule shows
A)
a total of 84 electron dots
B)
three single bonds and 10 lone pairs
C)
two single bonds, one double bond, and 9 lone pairs
D)
one single bond, two double bonds, and 8 lone pairs
E)
three single bonds and one lone pair
3.
The correct Lewis structure for CO2 is: C
O
O
A)
O
O
B)
O
O
C)
O
O
D)
O
4.
Which of the following Lewis structures is incorrect?
A)
B)
C)
D)
E)
5.
How many covalent bonds will be formed by bromine in BrO3– for the dot structure that expands the octet to minimize formal charge and places negative formal charges on only the most electronegative atom(s). The Pauling electronegativity values are:
Br = 2.8; O = 3.5
A)
3
B)
4
C)
5
D)
6
E)
7
6.
Estimate the enthalpy change for the reaction 2CO + O2 2CO2 given the following bond energies.
BE(CO) = 1074 kJ/mol
BE(O=O) = 499 kJ/mol
BE(C=O) = 802 kJ/mol
A)
+2380 kJ/mol
B)
+744 kJ/mol
C)
+1949 kJ/mol
D)
–561 kJ/mol
E)
–744 kJ/mol
7.
Give the number of lone pairs around the central atom and the molecular shape of the ion ClO3–.
A)
0 lone pairs, trigonal
B)
1 lone pair, bent
C)
1 lone pair, trigonal pyramidal
D)
2 lone pairs, T-shaped
E)
2 lone pairs, trigonal
8.
Which of the following substances is/are bent?
(i) H2S (ii). CO2 (iii) ClNO (iv) NH2– (v) O3
A)
only (iii)
B)
only (i) and (v)
C)
only (i), (iii), and (v)
D)
all are bent except for (iv)
E)
all are bent except for (ii)
9.
Which of the following molecules is polar?
A)
CH4
B)
SF6
C)
F2
D)
CH3F
E)
CO2
10.
Indicate the type of hybrid orbitals used by the central atom in TeF4.
A)
Sp
B)
sp2
C)
sp3
D)
sp3d
E)
sp3d2
11.
The hybridization of the O atom in CO2 will be
A)
S
B)
Sp
C)
sp2
D)
sp3
E)
sp3d
12.
The number of pi bonds in the molecule below is
A)
1
B)
2
C)
3
D)
5
E)
9
IMF’s
13. Order the forces (dipole-dipole, London dispersion, ionic, and hydrogen-bonding) from weakest to strongest .
a) dipole-dipole, London dispersion, ionic, and hydrogen-bonding
b) London dispersion, dipole-dipole, hydrogen-bonding, and ionic
c) hydrogen-bonding, dipole-dipole, London dispersion, and ionic
d) dipole-dipole, ionic, London dispersion, and hydrogen-bonding
e) London dispersion, ionic, dipole-dipole, and hydrogen-bonding
14. Which of the following would you expect to have the highest boiling point?
a) F2
b) Cl2
c) ...
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
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Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
1. 161
Model Question Paper
Marks : 40
Time :
1
2
2
hrs
I. Answer the following questions (4 × 4 = 16)
1. a) A circuit is shown in the picture. Let us assume that electric current of 5 amperes has
entered the circuit at A.
i) What is the potential difference between the points C and D ? (1m)
ii) What is the circuit equivalent resistance between the points A and B ? (2m)
iii) How much electricity enters through CD ? (1m)
(OR)
b) Let us assume that we made a small magnet (M) to fall through the metallic ring
i) Explain the direction of flow of current induced in the metallic ring as a result of
movement of the magnet.
ii) We know that acceleration due to gravity is g. How will the
magnetic acceleration when the bar magnet comes near or moves
away from the ring ?
2. A balanced equation of action of heat on Calcium nitrate is given
( )3 2 22
2 2 4Ca No Cao No OΔ
⎯⎯→ + ↑ + ↑
164 and 56 are the masses of Ca (NO3
)2
and CaO respectively
(i) How many moles of NO2
is released when one mole of Ca (NO3
)2
is decomposed?
(ii) What is the volume of O2
formed at STP when 65.6 gm of Ca (NO3
)2
is heated ?
(iii) What mass of Ca (NO3
)2
is required to produce 5 moles of gaseous products. (1m)
2. 162
(OR)
b) 1S2
2S2
2P6
3S1
and 1S2
2S2
2P4
are the electronic cofigurations of atoms X and Y
respectively.
1. Which atom can form anion ? Why ?
1
1
2
m
2. Which atom can form cation ? Why ?
1
1
2
m
3. Which block in the periodic table do the elements X and Y belong to ?
1
2
m
4. Write the formula of the molecule formed by the atoms of the elements X and Y.
3. Madhu draw a graph taking flow of current on Y axis and voltage on X axis. The got the
values by using a wire, voltmeter and ammeter
Answer the following questions based on the graph
i) What kind of wire was it ?
ii) Find the resistance of the wire.
iii) How much of electrical energy is used by
the wire when a potential difference of 20V
is supplied between the ends of the wire.
iv) Which rule / principle does the above graph show ?
(OR)
b) A student conducted experiment with a biconven lens and prepared the following table
Object distance in cm 70 60 50 40 30
Image distance in cm 14.5 15.2 16.2 17 20
Focal length in cm 12.01 12.12 12.13 11.92 12
i) What could be the reasons for different focal lengths in the above table ?
ii) How will you decide the focal length of the above lens ? What is its value ?
iii) Can you measure the image distance making the object distance 10 cm ? Why?
in volts
in ampers
3. 163
4. a) A carbon compound A (formula C2
H6
O) is extensively used as a solution in preparing
medicines. When this compound is heated along with potassium permanganate it gets
oxidised and finally a carbon compound B is formed compound B turns blue litmus red.
i) Write the chemical name and formula of compound A. (1m)
ii) Write the chemical name and formula of compound B. (1m)
iii) What is the nature of compound B (acid/base) salt.
1
2
m
iv) Write chemical equation indicating the intermediate product. (1m)
v) What is 5.8% solution of compound B is called ?
1
2
m
(OR)
b) A student was given the following chemicals by his teacher and was asked to conduct
an experiment to show types of chemical reaction. Explain writing chemical equations,
how he must have done the experiment.
1. Copper sulphate solution
2. Barium chloride solution
3. Iron nails
4. Ferrous sulphate crystals
5. Calcium oxide
6. Water
II. Short answer questions.
1. i) Give reason whether the following group is a Dobernair's triad or not.
Na, Si, Cl (Atomic weights of Na, Si, Cl are 23, 28, 35.5 respectively)
ii) What is the atomic weight of . If S, Se, Te are Dobernair's triad.
(23, 28, 35.5)
2. The pH values of solutions X, Y, Z are 13, 6 and 2 respectively.
i) Which solution is a strong acid ?
ii) Which solution is a strong base ?
iii) If a base is added to solution Z with the pH value of that solution increases or decreases.
4. 164
3. What questions will you ask to know more information about furnaces in regard with extraction
of metals.
III. Very short answers.
1. A student couldnot differentiate between acetic acid and ethyl alcohol solutions in a lab. How
can he identify with the help of Na2
CO3
available.
2. Two students, while walking on the road in the afternoon found image of water on the road.
When they went near nothing was found. Guess what could be the reasons for this.
3. When the teacher asked "How many bonds are there in
ammonia ?" The student, looking at the diagram answered
"There are 3 bonds". Explain the bonds in this molecule as per
hybridisation.
4. Though ethyle alcohol is very useful to human beings. It has a bad influence on the social
behaviour of human beings. Give 2 reasons stating your opinion on this.
5. Woollen clothes do not allow the body temperature to decrease. Suresh mentioned the reason
for this and appreciated the role of woollen cloth. What the reason might be ? How will you
appreciate it.
6. Rayudu kept a pencil far from the fixed mirror. Image of the pencil was not been in the mirror.
But he observed that when the pencil was brought nearer the image looked bigger after a
certain point/place. Draw the ray diagram indicating that.
7. What precautions must be taken while conducting the experiment angle of vision of eye.
IV. Multiple choice questions.
1. The four quantum numbers of an electron in an atom are as follows.
n l m s What is its electronic configuration?
1 0 0
1
2
−
(a) 2 S1
(b) 2 S2
(c) 1 S1
(d) 2 S2
5. 165
2. Three students measured the pH values of water, limejuice and sodium bicarbonate. The
descending order of those pH values.
a) Water > lemon juice > sodium bicarbonate
b) lemon juice > Water > sodium bicarbonate
c) sodium bicarbonate > Water > lemon juice
d) Water > sodium bicarbonate > lemon juice
3. What is the electronic configuration of the 4th element of 2nd group in the periodic table of
elements.
a) 1S2
2S2
2P6
3S2
b) 1S2
2S2
2P6
3S2
3P6
4S1
c) 1S2
2S2
2P6
3S2
3P4
d) 1S2
2S2
2P6
3S2
3P6
4S2
4. The following group contains the compounds of a homologous series in order. Find out the
compounds in the series
homologous series : CH3
OH
C2
H5
OH
C3
H7
OH
(a) C5
H11
OH (b) C4
H9
OH (c) both a and b (d) none
5. Irrelevent to thermal equilibrium
a) the temperatures of objects must be the same at thermal equilibrium
b) There will not be any heat transfer between objects at thermal equilibrium
c) Heat travels from the object of larger mass to the object of lesser mass at thermal
equilibrium.
d) Average kinetic energy of molecules in all the substances is equal.
6. A student saw the marks 120V; 60V on a bulb. To check whether the values are correct
or not he has to
a) use the formula
2
V
R
P
= and find the resistance.
b) measuring resistance with the help of a multimeter.
c) compare the value found out through multimeter with
2
V
R
P
=
6. 166
d) take the filament supply different voltages identify the ammeter reading and it on a graph;
decide the resistance based on the graph.
7. The magnification value m of a concave mirror is negative if less than 1. The correct answer
for this information
a) the object is beyond C, image formed is reverse and small.
b) the object between C and F, image formed is reverse and big.
c) the object is at F, image is at infinite.
d) the object is between F and P, image formed is long and in the mirror it is big.
8. If the temperature is increased, then the resistance of conductor also increased. The reason
is
a) collision of electrons
b) Change in the mass of electrons
c) expansion of conductor
d) decrease of time of collision between electron and : increase of vibrations of ions having.
9. The suitable formula to find out the focal length of an eye
a) ( )
1 2
1 1 1
= 1n
f R R
⎛ ⎞
− −⎜ ⎟
⎝ ⎠
b)
1 1 1
=
f v u
−
c) a & b
d) cannot be confirmed.
10. Elements and their electronic configurations of 2nd series are given
Atom : Li Be B C N O
152 111 88 72 74 66
The one that has the least ionisation energy
a) Li b) Be c) N d) O
7. 167
10th Class - Physical Science
Blue print for model paper
4 m 2 m 1 m
1
2
m
A.S.
I 2 (8 m) - 3 (3 m) 10 (5 m) 16
P-1, C-1 P-2, C-1 P-5, C-5
II - 2 (4 m) - - 4
P-1, C-1
III 1 (4 m) - 2 (2 m) - 6
P P-1, C-1
IV - 2 (4 m) 2 (2 m) - 6
P-1, C-1 P-1, C-1
V - 2 (4 m) - - 4
P-1, C-1
VI 1 (4 m) - - - 4
C
40 m4 6 7 10 27No. of questions
P - Physics
C - Chemistry
Marks for
Questions
Total
Marks
8. 168
Physical Science
Class 10 - Model Question Paper
I. Answer the following questions in detail. (4 × 4 = 16)
1. Heat is liberated in the reactions where water was added to calcium oxide and hydrochloric
acid was added to zinc pieces. Ramu said hence they are same type of chemical reactions.
Eshwar was of opinion that the reactions were not similar. What is the basis of Eshwar's
opinion. Write equations for the above reactions.
(OR)
Instead of using just plain water to clean clothes, why do we use detergent ? How dies it
remove dirt in clothes ? Explain.
2. "Efforts of Mendeleev in regard with classification of elements are outstanding". Do you agree
or disagree with the above statement. Explain with proper reasons.
(OR)
We see many combustion and oxidation reactions in our daily life. Among them every
combustion reaction is an oxidation reaction. But not all the oxidation reactions are combustion
reaction. Do you agree or disagree with the statement. Explain with proper reasons.
3. We kept an object at one of the centre of curvatures of equal radii of a convex lens.
Refractive index of the lens is n. If the lens is in the air explain the following
a) What is the focal length ?
b) What is the image distance ?
c) Discuss the nature of the image.
(OR)
Observe the picture. The values of potential differences
at A, B, C are 70V, 0V and 10V respectively.
a) What is the potential at D ?
b) Find the ratio of the flow of current in AD, DB,
DC
9. 169
4. Values of focal lengths are not written on the concave mirrors you have. What tools do you
need to find their focal lengths experimentally. How do you conduct the experiment ?
(OR)
Rama wanted to prepare lid with high specific heat to use on cooking utensil. What tools does
she need to find the specific heat of aluminium and copper ? How should she conduct the
experiment.
II. Answer the following questions briefly.
5. A mettalic spring is hung to heat resistant material. Imagine what happens if the two ends of
the vertically hanging spring are connected to a battery and switch in a circuit and the switch
is put on.
6. Substance A turned blue litmus paper to red - Substance B turned red litmus paper to blue.
What products could for in a reaction between A and B. Give reasons.
7. The electromotive force generated in a coil does not depend on the resistance of the coil.
Rayudu read this in a book. How do you analyse whether the above information is correct
or not.
8. a) CH3
- CH2
- CH2
- CH3
b) CH3
- CH - CH3
CH3
We can see that number of carbons and hydrogens is same in both the substances shown
above. What do you understand by the given shapes. Explain.
9. Show with the help of a diagram, how to form a circuit to compare the resistances of different
materials of same length and cross section area.
10. Show with the help of a diagram, a molecule in which porbitals of one of the atoms form
covalent bond with S orbitals of other atoms.
III. Answer the following in one or two sentences. (7 × 1 = 7)
11. 4 kg of water is at 100o
C temperature. How much heat energy is required for the whole
water to evaporate (water's latent heat of evaporation is 540 cal/gm)
12. In which condition the incident ray and refracted ray are equal ?
10. 170
13. You have conducted experiments in which a piece of Zn reacts with HCl and NaOH separately.
What is the common aspect you've observed in the experiment.
14. What is the main thing you've observed in the experiment to observe the process of melting
of ice i.e from melting of ice till it became water.
15. Based on the following electronic configuration choose the atom that forms an ion. Give
reason.
16. Observe the following table.
Material Ice Water Benzene Carbondisulphide
Refractive index 1.31 1.33 1.5 1.63
Based on the above values mention the material in which light has the least speed.
17. Observe the following table.
Atom of element Sodium Aluminium Potassium
Atomic number 11 13 19
Based on the information above what can you say about the size of the atoms ?
IV. Choose the correct answer. (10 × 1/2 = 5)
18. Which one of the following true for two materials at same temperature in different vessels.
a) they are in thermal equilibrium
b) the value of their heat content is equal.
c) We can say the value of their heat contents and masses based only on specific heat.
d) If 100 ml water is added to two vessels, then after some time their temperature will be
same.
19. Heat of resistance increases by adding resistance to a battery. Which of the following values
does not change.
a) electron drift speed b) specific resistance
c) resistance d) electron density
11. 171
20. Let us assume that a common electric bulb has a resistance of 240Ω . After 30 minutes of
its lighting its resistance could be as follows
a) 240 Ω b) < 240 Ω
c) > 240 Ω d) the above information is not sufficient
21. A charge travelling towards east got deviated to north due to the effect of magnetic field. As
per the above information the direction of magnetic field is towards...................
a) west b) south
c) up d) down
22. Which of the following gets heated most slowly
a) Kerosene (specific heat 0.5 cal/g-co
) b) Ice (specific heat 0.5 cal/g-co
)
c) Water (specific heat 1 cal/g-co
) d) Sea water (specific heat 0.95 cal/g-co
)
23. Which one of the following liquids is acetic acid ?
a) liquid with sweet smell b) liquid with pungent smell
c) liquid with out smell d) liquid with foul smell
24. There are 12 protons in the atom of an element. Which period and group does the element
belong to
a) 3rd period 2nd group b) 3rd period 3rd group
c) 2nd period 3rd group d) 2nd period 2nd group
25. Students a, b, c and d measured the pH values of water, sodium bicarbonate and lemonjuice
and wrote them in descending order. Who among them has identified correctly
a) Water > lemon juice > sodium bicarbonate
b) Lemon juice > water > sodium bicarbonate
c) Sodium bicarbonate > water > lemon juice
d) Water > sodium bicarbonate > lemon juice
26. In which of the following reactions only one product is formed.
a) Chemical combination b) Chemical decomposition
c) Chemical displacement d) Double decomposition
27. Which of the following does not have ionic bond
a) NaCl b) HCl c) MgCl2
d) BaCl2