1
MCQ (Single Correct Answer)

NEET 2016 Phase 2

Which one of the following compounds shows the presence of intramolecular hydrogen bond?
A
H2O2
B
HCN
C
Cellulose
D
Concentrated acetic acid

Explanation

H2O2, HCN and conc. CH3COOH form intermolecular hydrogen bonding while cellulose has intramolecular hydrogen bonding.
2
MCQ (Single Correct Answer)

AIPMT 2015 Cancelled Paper

Which of the following species contains equal number of $$\sigma $$- and $$\pi $$-bonds ?
A
(CN)2
B
CH2(CN)2
C
HCO3$$-$$
D
XeO4

Explanation



Number of $$\sigma $$ bonds = 4

Number of $$\pi $$ bonds = 4
3
MCQ (Single Correct Answer)

AIPMT 2015 Cancelled Paper

Maximum bond angle at nitrogen is present in which of the following ?
A
NO2+
B
NO3$$-$$
C
NO2
D
NO2$$-$$

Explanation

Species $$NO_3^-$$ $$NO_2$$ $$NO_2^-$$ $$NO_2^+$$
Hybridisation sp2 sp2 sp2 sp(linear)
Bond Angle 120o 134o 115o 180o
4
MCQ (Single Correct Answer)

AIPMT 2015 Cancelled Paper

Which of the following pairs of ions are isoelectronic and isostructural ?
A
SO32$$-$$,  NO3$$-$$
B
ClO3$$-$$,  SO32$$-$$
C
CO32$$-$$, SO32$$-$$
D
ClO3$$-$$, CO32$$-$$,

Explanation

Species Hybridisation Shape No. of e-
$$SO_3^{2-}$$ sp3 Pyramidal 42
$$ClO_3^{-}$$ sp3 Pyramidal 42
$$CO_3^{2-}$$ sp2 Triangular planar 32
$$NO_3^{-}$$ sp2 Triangular planar 32

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