Question # 1

Which one of the following is Lewis base?

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NH₃

BF₃

H⁺

AlCl₃

The word acid is derived from the.

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Greek word

Latin word

English word

Arabic word.

Froth flotation process is used to concentrate.

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Copper ore

Iron ore

Chromium ore

Aluminum ore

Incinerator reduces solid waste into .

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Ash

Flue gas

Heat

All of them

Which is a Lewis base?

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H⁺

NH₄

BF₃

AlCl₃

Concentration of the copper ore is carried out by:

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Calcinations

Roasting

Forth flotation

Distillation

Functional group of Alcohols is

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-COOH

-C=0

C-O-C

-OH

Which gas is evolved when acids react with carbonates and bicarbonates?

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Carbon monoxide

Carbon dioxide

Hydrogen

Hydrogen chloride

Which one of the ore of copper?

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Copper glance

Chalcopyrite

Both a and b

None of these

Specific heat capacity of water is.

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4.2 KJg^-1 K^-1

4.2 Jg^-1K^-1

2.4 KJg^-1K^-1

2.4 Jg^-1K^-1

Almost all aircrafts fly in:

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troposphere

mesosphere

stratosphere

themosphere

The forward reaction takes place:

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Right to left

Left to Right

Only to right

Only to left

Synthesis of protein is directed by.

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DNA

RNA

Both of them

None of them

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