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1

NEET 2013

MCQ (Single Correct Answer)
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.
2

NEET 2013

MCQ (Single Correct Answer)
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.
3

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)
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.
4

NEET 2013

MCQ (Single Correct Answer)
Which of these is not a monomer for a high molecular mass silicone polymer?
A
Me3SiCl
B
PhSiCl3
C
MeSiCl3
D
Me2SiCl2

Explanation

Since Me3SiCl contains only one Cl, therefore it can’t form high molecular mass silicon polymer. It can form only dimer.

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