Question # 1

The colour of anhydrous copper (II)sulphate solid is

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Pink

Black

White

Blue

Which one of the followign halogns has highest electronegativity

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Iodine

Fluorine

Chlorine

Bromine

Which molecule contains a single vovalent bond.

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CH4

C2H4

C2H2

O2

Formation of NO is

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Exothrmic

Endothermic

No Heat Change

None of these

Which acid is used in he preparation of soaf.

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Oxalic Acid

Citric Acid

Stearic Acid

Tartaric Acid

-------------acts are reserve energy sources.

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Enzymes

Vitamins

Proteins

Lipids

Which branch of chemistry deals with elements and compounds is earth's crust.

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Polymer chemistry

Organic chemistry

Geochemistry

Physical chemistry

¹³ C and ¹⁴ C are both present in nature.

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0,1 %

1.1 %

0.9 %

1.5 %

What is the mass of 4 moles of hydrogen gas.

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1 g

1.008 g

8.064 g

4.032 g

Number of electronsin nitrogen molecule is.

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2

4

6

8

Why the gas starts coming out when you open a can of fizzy drink.

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Because gteh solubiliyt of the gas increases

Because the gas is dissolved under pressure hence it comes out when pressur eis decreased

Becaue the gas is insoluble in water

Because the solubility of hte gas decreases at high pressure.

Triple covalent bond involves how many electrons.

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Six

Four

Eight

Three

The reaction in which the products can recombine to formreactants are called.

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Reversible Reaction

Irreversible reactions

Decomposition reactions

Addition reactions

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