Question # 1

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

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NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

Acid reacting with metal sulphides, liberate gas.

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Oxygen

Hydrogen

Hydrogen Sulphide

Hydrogen Oxide

One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X.

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C₃H₈

C₆H₁₂

C₄H₁₀

C₇H₁₆

General formula of Alkane is.

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C₁₀H_2n-2

C₆H₂₆

C₁₁H_2n-2

C_nH_2n-2

Triglycerides are fatty acids.

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Unsaturated

Saturated

Both of them

None of them

Temporary hardness is due to the presence of bicarbonates of.

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Calcium

Magnsium

Both of them

None of them

Conversion of dead plants into coal by the action of bacteria and heat is called.

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Carbonization

Catenation

Hydrogenation

Cracking

Which one of the following is non- reducing in nature;

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glucose

fructose

starch

sucrose

What is the colour of hydrogen iodide in product?

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Purple

Yellow

Blue

Colorless

Alkanes are also called:

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olefins

Paraffins

aliphatic compound

cyclic compounds

Water has a maximum density at .

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10^oC

0^oC

4^oC

100^oC

The dynamic equilibrium in irreversible reaction.

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Never establishes

Establishes after completion of reaction

Establishes before completion of reaction

Establishes very soon

Which of the following gas is used in warfare?

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Methane

Ethane gas

Mustard gas

None of these

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