Model Chemistry - Sample One Mark Questions

More important sample one mark questions for HSC Chemistry..10 questions to answer and all are of multiple choice type.

Question Set 2

1) Which of the following is used as neutron absorber in nuclear reactors

a) Water
b) Deuterium
c) Uranium
d) Cadmium

2) Frenkel defect is found in

a) NaCl
b) AgCl
c) CsCl
d) FeS

3) Which of the following process is always non-feasible:

a) $ \Delta H>0, \Delta S>0 $
b) $ \Delta H<0, \Delta S>0 $
c) $ \Delta H>0, \Delta S<0 $
d) $ \Delta H<0, \Delta S<0 $

4) In the reversible reaction $ 2HI\rightleftharpoons H_{2}+I_{2} \; k{p}$ is:

a) greater than Kc
b) less than Kc
c) equal+OKC
d) 0

5) The active mass of 28 gm of Nitrogen in a 2litres is:

a) 1 M
b) 0.5 M
c) 2 M
d) 4 M

6) In a first order reaction, the time taken to react 99.9% of the reaction is …….. times its half life period

a) 2
b) 5
c) 10
d) 100

7) The catalyst used in synthesis of $ SO_{3} $ by contact process is:

a) Fe
b) $ I_{2} $
c) MO
d) $ U_{2}O_{5} $

8) Fog is colloidal solution of

a) gas in liquid
b) liquid in gas
c) gas in solid
d) solid in gas

9) Which one of the following is used in the purification of drinking water

a) collodin
b) alum
c) silver bromide
d) chromium salt

10) The equivalent conductivity $ CH_{3}COOH $ at $ 25^{\circ}C $ is $ 80\;ohm^{-1}cm^{2}equ^{-1} $ and at infinite dilution $ 400\;ohm^{-1}cm^{2}equ^{-1} $. The degree of dissociation of $ CH_{3}COOH $ is ……….

a) 1
b) 0.2
c) 0.1
d) 0.3