Choose
the best answer:
1. In which of the
following , NH3 is not used?
a) Nessler’s reagent
b) Reagent for the
analysis of IV group basic radical
c) Reagent for the
analysis of III group basic radical
d) Tollen’s reagent
2. Which is true
regarding nitrogen?
a) least electronegative element
b) has low ionisation enthalpy than oxygen
c) d- orbitals available
d) ability to form pπ −pπ bonds with itself
3. An element belongs to
group 15 and 3 rd period of the periodic table, its electronic configuration
would be
a) 1s2 2s2
2p4
b) 1s2 2s2
2p3
c) 1s2 2s2
2p6 3s2 3p2
d) 1s2 2s2 2p6 3s2 3p3
4. Solid (A) reacts with strong aqueous NaOH liberating a foul
smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are
respectively
a) P4(red)
and PH3
b) P4(white) and PH3
c) S8 and H2S
d) P4(white)
and H2S
5. In the brown ring
test, brown colour of the ring is due to
a) a mixture of No and
NO2
b) Nitroso ferrous sulphate
c) Ferrous nitrate
d) Ferric nitrate
6. On hydrolysis, PCl3
gives
a) H3PO3
b) PH3
c) H3PO4
d) POCl3
7. P4O6
reacts with cold water to give
a) H3PO3
b) H4P2O7
c) HPO3
d) H3PO4
8. The basicity of
pyrophosphorous acid ( H4P2O5) is
a) 4
b) 2
c) 3
d) 5
9. The molarity of given
orthophosphoric acid solution is 2M. its normality is
a) 6N
b) 4N
c) 2N
d) none of these
10. Assertion : bond dissociation energy of fluorine is greater
than chlorine gas
Reason: chlorine has
more electronic repulsion than fluorine
a) Both assertion and
reason are true and reason is the correct explanation of assertion.
b) Both assertion and reason are true but reason is not the
correct explanation of assertion.
c) Assertion is true but reason is false.
d) Both assertion and
reason are false.
Solution:
Both assertion and reason are wrong.
The converse is true.
11. Among the following,
which is the strongest oxidizing agent?
a) Cl2
b) F2
c) Br2
d) l2
12. The correct order of the thermal stability of hydrogen halide
is
a) HI > HBr > HCl
> HF
b) HF > HCl > HBr > HI
c) HCl > HF > HBr
> HI
d) HI > HCl > HF
> HBr
13. Which one of the
following compounds is not formed?
a) XeOF4
b) XeO3
c) XeF2
d) NeF2
14. Most easily liquefiable gas is
a) Ar
b) Ne
c) He
d) Kr
15. XeF6 on
complete hydrolysis produces
a) XeOF4
b) XeO2F2
c) XeO3
d) XeO2
16. On oxidation with iodine, sulphite ion is transformed to
a) S4 O62−
b) S2 O62−
c) SO42−
d) SO32−
17. Which of the following
is strongest acid among all?
a) HI
b) HF
c) HBr
d) HCl
18. Which one of the
following orders is correct for the bond dissociation enthalpy of halogen
molecules?
a) Br2 > I2
> F2 > Cl2
b) F2 > Cl2
> Br2 > l2
c) I2 > Br2
> Cl2 > F2
d) Cl2 > Br2 > F2 > I2
19. Among the following
the correct order of acidity is
a) HClO2 <
HClO < HClO3 < HClO4
b) HClO4 <
HClO2 < HClO < HClO3
c) HClO3 <
HClO4 < HClO2 < HClO
d) HClO < HClO2 < HClO3 < HClO4
20. When copper is heated with conc HNO3 it produces
a) Cu(NO3)2
, NO and NO2
b) Cu(NO3)2
and N2O
c) Cu(NO3)2 and NO2
d) Cu(NO3)2
and NO
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