471.

What are the shapes of ethyne and methane?

• Square planar and linear

• Tetrahedral and trigonal planar

• Linear and tetrahedral

• Trigonal planar and linear

The bond angle of bond in methoxy methane is

• 111.7°

• 109°

• 108.9°

• 180°

Which of the following compounds has zero dipole moment?

• 1, 4-dichlorobenzene

• 1, 2-dichlorobenzene

• 1, 3-dichlorobenzene

• 1-chloro-2-methyl benzene

The number of electrons is the valence shell of the central atom of a molecules is 8. The molecule is

• BCl₃

• BeH₂

• SCl₂

• SF₆

Which one of the following has longest covalent bond distance?

• C—C

• C—H

• C—N

• C—O

In which of the following molecules, all bond lengths are not equal?

• SF₆

• PCl₅

• BCl₃

• CCl₄

In which of the following molecules, maximum number of lone pairs is present on the central atom?

• NH₃

• H₂O

• ClF₃

• XeF₂

Match the following:

List - I (Magnetic Property)	List - II (Substance)
A. Ferromagnetic	1. O2
B. Antiferromagentic	2. CrO2
C. Ferrimagnetic	3. MnO
D. Paramagnetic	4. Fe3O4 5. C6H6

• A - 3; B - 2; C - 4; D - 1

• A - 2; B - 3; C - 4; D - 1

• A - 1; B - 3; C - 5; D - 4

• A - 4; B - 2; C - 3; D - 5

Which one of the following statements is not correct?

• O₃ is used as a germicide.

• In O₃ , O - O bond length is identical with that of molecular oxygen.

• O₃ is an oxidising agent

• The shape of O₃ molecule is angular.

Which among the following are having diamagnetic property?

(i) B₂    (ii) N₂    (iii)O₂   (iv) C₂

• II, III

• I ,IV

• II, IV

• I, II