Past Papers 2nd Year Chemistry Unit No.4
Here is online preparation sources for the annual examination of F.sc. Chapter Wise Past Papers 2nd Year Chemistry chapter No.4 with important MCQs, Short Questions and Long Questions.
Chapter 4 Notes | Chemistry 2nd Year
Group V-A And Group VI-A Elements
Q.No.1 A). Each question has four possible answers. Select the correct answer and circled it.
v Out of all the elements of IIA the highest ionization energy is possessed by
(a) N (b) P
(c) Sb (d) Bi
v Oxidation of “NO” in Air produces
v (a) NO2 (b) N2O3
v (c) N2O6 (d) N2O5
v Which one of them is the formula of stibnite
v (a) Sb2S3 (b) SbS3
v (c) Sb3S (d) Sb2S2
v Laughing gas is chemically
v (a) NO (b) N2O
v (c)NO2 (d) N2O4
v Which metals do not react with HNO3
v (a) Au (b) Pt
v (c) Ir (d) All of them
v Which one of the oxide form Nitrosyl chloride
v (a) NO (b) NO2
v (c) N2O (d) N2O4
v HNO2 is prepared by the reaction of
(a) Ba(NO2)2+H2SO4 (b) N2O3+H2O
(c) BaCl2+HNO3 (d) a and b
v Which Acid produces phenol with amino benzene
v (a) HNO3 (b)HNO2
v (c)H2SO4 (d) H3PO3
v Silica contains %age of oxygen by weight
v (a) 50% (b)52%
v (c)54% (d) 53%
v Which catalyst is used in Contact process
v (a) Fe2O3 (b) V2O5
v (c) SO3 (d) Ag2O
B). Give Short Answer of the following
1. What is aqua regia. How pt and Au are dissolved in it.
2. What happens when HNO3 reacts with H2S.
3. What is ring test write its equation.
4. Give two reactions in which H2SO4 acts as dehydrating agent.
5. Write two Equations in which H2SO4 acts as oxidizing agent.
Q.No.2.
(a) Write two Methods for preparation of “NO2” and what happens when NO2 reacts with followings
(i) Phosphorous (ii) Water (ii) Sodium Hydroxide
(b) Write the preparation of H3PO3 and what happens when H3PO3 reacts with following
(i) Nascent hydrogen (ii) Ammonical silver nitrate (iii) Oxygen
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