Question # 1

The spectrum of helium is expected to be similar to that of

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H

Li⁺

Na

He⁺

Which of the following imparts violet colouration to the non-luiminous flame of Bunsen burner?

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NaCI

BaCI₂

CaCI₂

KCI

The symbol of the element whose atoms have the outer most electronic configuration 2s² 2p³ is

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N

Li

P

Na

The ratio of the ionization energy of H and Be³⁺ is

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1 : 1

1 : 3

1 : 9

1 : 16

Which of the following substances is used as an antiknock compound?

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyl acetate

The vapour density of a gas is 11.2 The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 liters

11.2 liters

1 liter

2.24 liters

Which of the following with aqueous KOH will give acetaldehyde?

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1,2-Dichloroethane

1, 1-Dichloroethane

Chloroacetic acid

Ethyl chloride

Which one of the following elements occurs free in nature?

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N

P

As

Sb

Which inorganic precipitate acts as semipermeable membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

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