Question # 1

Night blindness is because of deficiency of:

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Vitamin A

Protein

Vitamin C

Vitamin D

Crude oil is heated to the fractionating furnace upto.

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300 ^oC

350^oC

400^oC

450^oC

Which gas like a glass wall of g green house:

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CO

O2

CO2

N2

Which one is the formula of chloromethane.

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CH₂Cl₂

CCl₄

CHCl₃

CH₃Cl

Ozone depletion was first noticed is.

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1970's

1980's

1990's

1960's

Which diseases cause by the deficiency of vitamin E?

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Rickets

Anemia in babies

Scurvy

Night blindness

Which of one the following is Lewis base?

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BF3

H+

NH3

Ag+

Which colour of HI is ?

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Orange

Purple

Red

Colourless

A product of any Lewis acid base reaction is a single specie called.

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Salt

Water

Adduct

None of these

Bronsted and Lowry presented their theories of acids and bases in

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1785

1787

1923

1925

Alkynes are also called.

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Olefine

Ethene

Paraffins

Acetylenes

Froth flotation process is used to concentrate the ore on:

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Density basis

Concentration basis

Wetting basis

Magnetic basis

The number of carbon atoms present in diesel oil.

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10-15

11-15

12-15

13-15

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