fazaia inter college lahore Send up examination class xi and xii 2017-18

1. FAZAIA SCHOOLS & COLLEGES
SEND-UP EXAM: CHEMISTRY HSSC-II (Lahore Board)
(Session 2017 – 18)
Roll No.
Name of Candidate
SECTION – I (Marks 44)
Time allowed : 2 Hours and 35 Minutes (Total Marks: 68)
NOTE: Questions therein are to be answered on the separately provided Answer Book. Use supplementary
answer sheet i.e., sheet B if required. Write your answers neatly and legibly.
Q.2. Write short answers to any Eight questions. (8× 2 = 16)
(i) Why d and f block element, are called transition elements.?
(ii) The melting and boiling points of the elements increase from left to right up to the middle
of S and P block elements and decreases on ward.
(iii) The oxidation state vary in a period but remain almost constant in a group.
(iv) Define group and period.
(v) Why lime water turns milky with CO2 but becomes clear with excess of CO2?
(vi) Why 2 % gypsum is added in the cement.
(vii) How lime mortar is prepared.
(viii) Why aqueous solution of Na2CO3 is alkaline in nature?
(ix) How may ethane be converted into ethyl alcohol?
(x) How will you convert 1-butene to 1- butyne. ?
(xi) Write any two methods to prepare alkane.
(xii) Write formula for each of following compound.
(a) 2,5 Heptadiene (b) 1-Butyne
Q.3. Write short answers to any Eight questions. - (8× 2 = 16)
(i) Why does aqua regia dissolve gold and platinum?
(ii) Write down the equation for the reaction between conc, H2SO4and Cu.And explain what
type of reaction is it
(iii) Why is So3 dissulved in H2SO4 and not is water?
(iv) Describe ring test for the confirmation of the presence of nitrate ion in solution.
(v) Write mechanism for nitration of benzene.
(vi) How will you prepare following compounds in two steps.
(a) p- chlorinator benzene
(b) m- chlorinator benzene
(vii) Write structural formulas for
(a) 2,4,6, - Trinitrotoluene (b) m- Nitro phenol
(viii) What is wurtz fitting Reaction?
(ix) How does ethyl magnesium bromide react with HCHO followed by hydrolysis in presence
of an acid.

2. (x) Write any two methods of preparation of alkyl halide form alcohol.
(xi) How does ethyl bromide react with NH3 ?
(xii) Write reaction of ethyl magnesium bromide with ethylene epoxide followed by acid
hydrolyses.
Q.4. Write short answer of any SIX questions. - (6× 2 = 12)
(i) Why are liquid silicones preferred over ordinary organic lubricants. ?
(ii) How does borax serve as a water softening agent.
(iii) Write a note on borax bead test along with its chemistry.
(iv) What isdisproportionation reaction. Explain. your answer with an example.
(v) Give any two applications of noble gases.
(vi) What are homocyclic and heterocyclic compounds? Give one example of each?
(vii) Write structural formula of two possible isomers of C4H10.
(viii) What is functional group isomerism.
(ix) Give systematic names to following complexes
(a) Na3[COF6] (b) [Pt(OH)2 (NH3)4]SO4
SECTION – II (Marks 24)
NOTE: Attempt any Three (3) Questions. (3X8=24)
Q.5. (a) Discuss groups and periods in the modern periodic table.
(b) Write a note on SN2 reactions.
Q.6. (a) Describe with diagram the manufacture of caustic soda by Neloson cell.
(b) Write a note on Friedel Craft Alkylation and Acylation reaction.
Q.7. (a) Write methods of preparation of Borax .
(b) Show by means of chemical equations , how the following cycle of changes may be
affected
Q.8. (a) Discuss Birkel and Eyde’s process for manufacture of nitric acid.
(b) Write a note on cracking of petroleum.
Q.9. (a) Discuss the reactions when bleaching powder reacts with the following reagents
dil H2SO4 ,excess of conc H2SO4 , NH3 , HI and CO2
(b) What is corrosion , Explain electrochemical theory of corrosion.