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1
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
Strong reducing behavior of H3PO2 is due to
A
high electron gain enthalpy of phosphorus
B
high oxidation state of phosphorus
C
presence of two $$-$$OH groups and one P$$-$$H bond
D
presence of one $$-$$OH group and two P$$-$$H bonds.
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence
A
Al < Ga < In < Tl
B
Tl < In < Ga < Al
C
In < Tl < Ga < Al
D
Ga < In < Al < Tl
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The variation of the boiling points of the hydrogen halides is in the order HF > HI > HBr > HCl.

What explains the higher boiling point of hydrogen fluoride?
A
There is strong hydrogen bonding between HF molecules.
B
The bond energy of HF molecules is greater than in other hydrogen halides.
C
The effect of nuclear shielding is much reduced in fluorine which polarises the HF molecule.
D
The electronegativity of fluorine is much higher than for other elements in the group.
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the statements given below is incorrect?
A
O3 molecule is bent.
B
ONF is isoelectronic with O2N
C
OF2 is an oxides of fluorine.
D
Cl2O7 is an anhydride of perchloric acid.
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