Question # 1

Which one of the following salts makes the water permanently hard?

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NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

Which of the following is tasteless?

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Starch

glucose

Fructose

Sucrose

Which one of the following is manufactured by Solvar's process:

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caustic soda

washing soda

urea

sulphuric acid

Halogenation of methane produces following valuable chemical compounds used as solvents except.

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Carbonterachloride

Chloroform

Carbon Black

Chloromethane

Ozone is beneficial for us as it absorbs.....................

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Infrared Radiations

Ultraviolet radiations

Chlorofluorocarbons

Air pollutants

Organic compounds contain:

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ionic bond

Covalent bond

Metallic bond

Co-ordinate covalent

Industrial effluents are highly

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Toxic organic compounds.

Inorganic salts.

Heavy metals

All of them

Which is the major effect of global warming?

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Increase in temperature.

Rise in sea level

Melting of glaciers

All of them

The reaction in which the products do not recombine to form reactants are called.

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Inversible reactions

Reversible reaction

Decomposition

Addition

Which one of the following is a fat soluble vitamin?

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A

E

K

All of these

The end product of oxidation of acetylene is .

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Oxalic acid

Glyoxal

Glycol

None of these

Thousand of amino acids polymerize to form.

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Carbohydrates

Proteins

Lipids

Vitamins

Methyl butanoate smells like;

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a pine apple

an apple

an orange

a lemon

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