1
MCQ (Single Correct Answer)

AIPMT 2011 Mains

Which of the following oxide is amphoteric?
A
SnO2
B
CaO
C
SiO2
D
CO2

Explanation

SnO2 reacts with acid as well as base. So SnO2 is an amphoteric.

SnO2 + 4HCl $$ \to $$ SnCl2 + 2H2O

SnO2 + 2NaOH $$ \to $$ Na2SnO3 + H2O

CaO is basic in nature while SiO2 and CO2 are acidic in nature.
2
MCQ (Single Correct Answer)

AIPMT 2011 Mains

Which of the following statements is incorrect?
A
Pure sodium metal dissolves in liquid ammonia to give blue solution.
B
NaOH reacts with glass to give sodium silicate.
C
Aluminium reacts with excess NaOH to give Al(OH)3.
D
NaHCO3 on heating gives Na2CO3.

Explanation

Al reacts with NaOH to give sodium metaaluminate.

2Al(s) + 2NaOH (aq) + 2H2O(l) $$ \to $$ 2NaAlO2 + 3H2
3
MCQ (Single Correct Answer)

AIPMT 2011 Prelims

Name the two type of the structure of silicate in which one oxygen atom of [SiO4]4$$-$$ is shared?
A
Linear chain silicate
B
Sheet silicate
C
Pyrosilicate
D
Three dimensional

Explanation

Pyrosilicate contains two units of SiO44– joined along a corner containing oxygen atom.
4
MCQ (Single Correct Answer)

AIPMT 2010 Mains

How many bridging oxygen atoms are present in P4O10?
A
6
B
4
C
2
D
5

Explanation

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