Question # 1

The total number of protons in 10 g of calcium carbonate is (N_o = 6.023 x 10²³)

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1.5057 x 10²⁴

2.0478 x 10²⁴

3.0115 x 10²⁴

4.0956 x 10²⁴

Natural fertilizer from plants and animals provide nitrogen

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1.5 kg

3.0 kg

4.5 kg

6 kg

Which one of the following compounds does not exist?

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NCI₅

AsF₅

SbCI₅

PF₅

Which of the following species participate in sulphonation of benzene ring?

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H₂SO₄

HSO^-₃

SO₃

SO^-₂

Which of the following is not present in RNA?

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Uracil

Thymine

Ribose

Phosphate

Acetic anhydride is obtained form acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

Which of the following belongs to the halogen family?

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Francium

Polonium

Radium

Astatine

The number of electrons in the M shell of the element with number 24 is

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24

12

13

8

Calcium cyanamide on treatment with steam under pressure gives NH₃ and

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Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

Which has largest first ionization energy?

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Li

Na

K

Rb

The rate at which a substance reacts depends on its

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Atomic weight

Equivalent weight

Molecular weight

Active mass

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