Question # 1

Process of heating the concentrated ore to high temperature in excess of air is called.

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Roasting

Smelting

Bessemerization

All

Infrared radiation emitted by the earth are absorbed by?

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CO₂,H₂O

N₂,O₂

CO₂,N₂

O₂,CO₂

Monosaccharides consist of:

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2 to 6 carbon atoms

3 to 9 carbon atoms

4 to 10 carbon atoms

10 to 15 carbon atoms

Acetic acid is used for:

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Elching designs

Clearing metals

Flavouring food

Making explosives

Which one is not a characteristic of an acid:

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it turns red litmus blue

it reacts with base to form salt and water

Its aqueous solution conduct electric current

it has sour taste

Law of Mass Action was put forward by:

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G.N.Lewis

Lowry

Arrhenius

Gulbderg and Waage

The chemical used in Clark's method is:

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CaO

slaked lime(Ca(OH)s)

washing soda

sodium zeolite

Runcid butter has

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Foul smell

Rotten egg smell

Pungent smell

No smell

Chemical formula of Stearic acid.

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C₁₅H₃₁COOH

C₁₇H₃₅COOH

C₁₅H₃₇COOH

None of them

Which types of reaction speed up gradually?

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Irreversible reactions

Reversibel reactions

Forward reactions

Decomposition reactions.

Molecular formula of butane is

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C₄H₈

C₄H₁₀

C₄H₁₂

C₄H₆

Which compound do not produce in the halogenation of methane.

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Chloroform

Carbon tetrachloride

Carbon black

Chloromethane

According to Lewis concept a base is a substance which can donate.

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Proton

Electron pair

Neutron

Electron

Who proved that the presence of hydrogen as the main constituent of all acids.

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Lavoisier

Humphrey Davy

Dalton

Arrhenius

Dextrose is a crystallized:

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sucrose

lactose

glucose

fructose

Which gas is responsible in warming the atmosphere?

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Nitrogen

Hydrogen

Helium

Fluorine

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