Question # 1

Permanent hardness is removed by adding.

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Na₂ zeolite.

Soda lime

Lime water

Quick lime

Temporary hardness in water can he removed by.

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Boiling Method

Using washing soda

Using sodium zeolite

All of them

Fossil fuel means.

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Coal

Petroleum

Natural gas

All of them

What is the percentage of carbon in anthracite?

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60%

70%

80%

90%

Formation profess of Ammonia by the combination Hydrogen and Nitrogen was given by:

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Dalton

Thomson

Haber

Waage

The boiling point of water is.

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100^oC

4^oC

0^oC

25^oC

A bound formed between two amino acids is:

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Peptide linkage

Covalent bound

Hydrogen bound

Glycosidic linkage

The gas used by animals to perform respiration.

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O₂

N₂

SO₂

Cl₂

When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of:

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Cu2S + Cu2O

Cu2O +FeS

Cu2S + FeS

FeO + SO2 + Cu2S

Dilute acid react with carbonates the produce product except _________

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Salt

Water

Carbon di oxide

Hydrogen gases

General formula of carbohydrate is.

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C_n(H₂O)₆

CH

C_nH_2n

C₆H_2nO

Nucleic acids made up of long chain of.

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Nucleotide

Fatty acids

Amino acid

None of them

the chemical formula of chalcopyrite is:

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Cu₂S

CuFe₂S

CuS

FeS

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