1
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.
2
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.
3
MCQ (Single Correct Answer)

NEET 2013

Which of the following structure is similar to graphite?
A
B4C
B
B2H6
C
BN
D
B

Explanation

Boron nitride (BN) is known as inorganic graphite. The most stable form is hexagonal one. It has layered structure similar to graphite.
4
MCQ (Single Correct Answer)

NEET 2013

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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