1
MCQ (Single Correct Answer)

NEET 2013

Which of the following does not give oxygen on heating?
A
K2Cr2O7
B
(NH4)2Cr2O7
C
KClO3
D
Zn(ClO3)2

Explanation

(NH4)2Cr2O7 $$\buildrel \Delta \over \longrightarrow $$ N2 + Cr2O3 + 4H2O

Zn(ClO3)2 $$\buildrel \Delta \over \longrightarrow $$ ZnCl2 + 3O2

KClO3 $$\buildrel \Delta \over \longrightarrow $$ KCl + $${3 \over 2}$$O2

2K2Cr2O7 $$\buildrel \Delta \over \longrightarrow $$ 2K2CrO4 + Cr2O3 + $${3 \over 2}$$ O2
2
MCQ (Single Correct Answer)

NEET 2013

Which one of the following molecules contains no $$\pi $$ bond?
A
SO2
B
NO2
C
CO2
D
H2O

Explanation

H2O does not contain any $$\pi $$-bond.
3
MCQ (Single Correct Answer)

NEET 2013

Which is the strongest acid in the following?
A
HClO4
B
H2SO3
C
H2SO4
D
HClO3

Explanation

HClO4 with highest oxidation number and its conjugate base is resonance stabilised, hence it is most acidic.
4
MCQ (Single Correct Answer)

NEET 2013 (Karnataka)

Which statement is wrong?
A
Beryl is an example of cyclic silicate.
B
Mg2SiO4 is orthosilicate.
C
Basic structural unit in silicates is the SiO4 tetrahedron.
D
Feldspars are not aluminosilicates.

Explanation

Feldspars are three dimensional aluminosilicates.

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