2. JIPS & CNS 2018
Class 9th
chemistrychapter1
Answerfollowingquestion
1. What ischemistry?
2. What isscope of chemistryindailylife?
3. What isphysical chemistry?
4. Differentiate betweenorganicandinorganicchemistry?
5. What isscope of biochemistry?
6. Write the usesof nuclearchemistry?
7. What isanalytical chemistry?
8. What isthe relative atomicmass?
9. Define matterandwrite aboutsubstance andmixture?
10. Differentiate betweenphysical andchemical propertiesof matter?
11. Differentiate betweenhomogenousmixture andheterogeneousmixture?
12. What isthe relative atomicmass?
13. What isempirical formulaandmolecularformula?
14. Write the empirical formulaof glucose,water,benzene,andsucrose?
15. Write the molecularmassof sulfuricacid,nitricacid,glucose,sucrose,sodiumchloride
and potassiumnitrate?
16. What isdifference betweenmolecularmassandformulamass?
17. What isdifference betweencationandanion?
18. Why cationissmallerthanparentatom?
19. Why anionisgreaterthan parentatom?
20. Write the electronicchemical equationof cationandanionof following?
21. Potassium2) chlorine 3) sodium4) magnesium5) nitrogen6) oxygen
22. Differentiate betweenmolecularmassandformulamass?
23. Write the name of homoatomicmolecule?
24. Calculate noof molecule of H2So4 andwater?
25. What isformulamass?
26. Define gramatomicmass?
27. Write the name of gram atomicmass element,molecularmassandformulamass of
ionicsubstance?
28. What isdifference betweenatomicnoandatomicmass?
29. Write the relative atomicmassof an element
30. What isthe conjugatedmolecule?
31. How molecularioncanalsobe generated?
32. Define free radical
33. What ishemolyticlineage andhetrolyticlineage?
3. JIPS & CNS 2018
34. What isDalton atomictheory?
35. What isplumpuddingtheory?
36. Draw the structure of discharge tube
37. Write three propertiesof electron
38. How e/mof electroncanalso measured
39. Prove that the electronisthe material particle
40. Why protoniscanal rays
41. Write three propertiesof neutron
42. What iselectronicconfiguration
43. Difference between shellandsub-shell
44. Define isotopesandwrite itschemical dependence
45. What iscarbon dating?
46. Differentiate betweenRathurfordatomicmodel andboharatomicmodel
47. What isradiotheraphy?
48. Write defectsinratherfordatomic model?
49. Write the postulate of boharatomic model?
50. Write Dobrinertrides?
51. What islaw of octave?
52. What ismendleeve periodictable?
53. Write defectsof mendleeveperiodictable?
54. What ismoselylaw?
55. Write s, p,d, f blockelements?
56. What isionizationenergy?
57. Write trendsof ionizationenergy?
58. Why secondionizationenergyisgreaterthanfirstionizationenergy?
59. What iselectronegativity?
60. What isatomic radiusandwrite itsunits?
61. Atomicradiusdecreasesinperiods?Why
62. Atomicradiusincrease ingroup?Why
63. Why secondelectronaffinityshow positive sign?
64. Why electronaffinityincrease inperiodanddecrease ingroup?
65. What isshieldingeffect?
66. Why shieldingeffectdecreaseinperiod?
67. Why shieldingeffectincreasein group?
68. Write the electronicconfigurationof noble gases?
69. Write the name of familyinperiodictable?
70. What isperiodictable?
71. Write downthe name of noble gasesinperiodictable?
72. Why noble gasesshowzerooxidationstate?
73. What isthe ionicbond?
74. What isthe covalentbond?
75. Difference betweenlone pairandbondpair?
4. JIPS & CNS 2018
76. Write downthe chemical propertiesof covalentcompound?
77. What isthe coordinate covalentbond?
78. What are donorand accepter?
79. What isdifference betweencovalentbondandnon-polarcovalentbond?
80. What ishydrogenbonding?
81. What isdipole dipoleforce?
82. How molecularionisformed?
83. What isioniccompound?
84. Why metalliccompoundhave highmeltingpointandboilingpoint?
85. Why ionicbondshave highmeltingandboilingpoint?
86. What are factorswhicheffectonhydrogenbonding?
87. Write downthe name of elementsinwhichhydrogenbondingprominent?
88. What isdiffusionandeffusion?
89. What are factorswhicheffectondiffusion?
90. What are factor whichdoesnoteffectondiffusion?
91. What isstandard atmosphericpressure?
92. What is boylslawandcharls law?
93. What isthe experimental verificationof boylslaw?
94. What isthe experimental verificationof charlslaw?
95. What isabsolute zero?
96. What are factorswhicheffectonevaporation?
97. Why evaporationcause cooling?
98. What are amorphoussolidandamorphousliquids?
99. What isallotropy?
100. Write the name of allotropieswiththe helpof examples
101. What are conjugatedmolecules?
102. What isboilingpoint?
103. What ismeltingpoint?
104. What issolutionandite the name of solution?
105. What issaturated solutionandunsaturatedsolution?
106. What issupersaturatedsolution?
107. Write the name of supersaturatedcompound
108. What isaqueoussolutionandnon-aqueoussolution?
109. What isthe concentrationof solution?
110. What isthe volume/volume % solution?
111. What ismorality?
112. What is tyndal effect?
113. What iscolloidal and non-colloidalparticales?
114. What issuspension?
115. Write the examplesof suspension,collides,,solution?
116. What isfalse solution?
117. Write the examplesof false of false solution
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118. Why polardissolve inpolarandnonpolardissolve innonpolar?
119. What isthe principle of solubility?
120. Why saltare dissolvedquicklyinwater?
121. Why alcoholsdissolve inwater?
122. What iselectrochemistry?
123. What isoxidationandreduction?
124. What are electrolytesandnonelectrolytes?
125. What are weak electrolytesandstrongelectrolytes?
126. What iselectrochemistry?
127. What are oxidizaingagentandreducingagents?
128. What are electrolyticcell andgalvaniccell?
129. What isconstructionof galvaniccell?
130. What iszinc plating?
131. What iscopper plating?
132. What isgalvanizingfactor?
133. What isNeilsoncell?
134. Difference betweengalvaniccell andvoltaiccell?
135. What iscopper refining?
136. What are the name of leastreactive,moderatereactiveandhigherreactive
elements?
137. Difference betweenalkali metalsandalkaline earthmetals?
138. What are the usesof sodium?
139. What are the usesof gold?
140. What isthe useso nickel?
