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1

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.
2

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.
3

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.
4

NEET 2013

MCQ (Single Correct Answer)
The basic structural unit of silicates is
A
SiO32$$-$$
B
SiO$$_4^{2 - }$$
C
SiO$$-$$
D
SiO$$_4^{4 - }$$

Explanation

SiO$$_4^{4 - }$$ orthosilicate is basic unit of silicates.

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