Question # 1

Which of the following molecules have unpaired electrons is the bonding molecular orbitals.

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N2

O2

B2

F2

Dipole moment of CO2 is.

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1.25 D

1.85 D

3.1 D

Zero

In which molecule all atoms are coplanar.

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CH4

BF3

NH3

PH3

Which of the following has highest percentage ionic character.

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HCl

HF

HBr

HI

Which one of the following correctly describe the shape of NH3 molecules.

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tetrahedral

Pyramidal

Angular

Square planar

The number of bonds in nitrogen molecules is.

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One pi and one sigma

One pi and two sigma

Thre sigma only

Two pi and one sigma

Which of the following molecules has a co-ordinate covalent bond

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NH₄CI

NaCI

HCI

AICI₃

Which pair are iso electronic.

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Na+ and Cl-

Na+ and Mg+2

N-3 and P-3

H+ and H-

Which one of the following has the greater ionic characters in it.

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HF

HCl

H2O

H2

The bond angle in NH3 molecule is

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109.5^o

107.5^o

104.5^o

106^o

In BeCl2, the covalent bond is formed due to overlap of

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sp -s

sp -p

sp2 -p

sp3 -p

Which of the following has coordinate covalent bond.

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NH4

NaCl

HCl

AlCl3

Molecule in which the distance between two carbon atoms in the largest is.

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C2H6

C2H4

C2H2

C6H6

Carbon atom in methane in hybridized.

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sp3

Sp2

Sp

dsp3

Ionic bond is formed by combination of groups

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IA and VIII

II A and VII A

IV A and VA

VIA and VII A

The structure of water molecule is.

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angular

Linear

Trigonal

Trigonal pyramidal

Which of the following has linear structure.

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CO2

NH3

CH4

H2O

A molecular orbital can accommodate maximum electron

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2

6

8

10

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