Question # 1

The removal of Mg⁺² and Ca⁺² Ion which are responsible for the hardness of water is called.

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Temporary hardness

Permanent hardness

Water softening

Hydrogen bonding

Which of the following is reducing sugar?

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Glucose

Maltose

Sucrose

Starch

Glucose and fructose are;

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trioses

tetroses

pentoses

hexoses

Sodium carbonate is manufactured by.

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Haber's process

Ostwald's process

Solvay's process

All

Vital force theory was rejected by.

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Jabir Bin Hayan

Drawin

Wohler

Berzellius

Building block of lipids are.

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Fatty acids

Carboxylic acids

Mineral acids

Alcohols

Lactose and maltose are;

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monosaccharides

disaccharides

trisaccharides

tetrasaccharides

The % age of carbon is bituminous is

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60

70

80

90

At equilibrium state, when reaction cases to proceed, it is called:

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equilibrium constant

dynamic equilibrium

static equilibrium

simple equilibrium

Ethen is prepared by heating a mixture of ethanol and excess of concentrated sulphuric acid at:

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150°C

180°C

250°C - 300°C

400°C - 450°C

Which is the main component of natrual gas.

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Methane

Ethane

Propane

Charcoal

___________ is not an acid:

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HCl

NH₃

H₂CO₃

H₂SO₄

Almost all air crafts fly in which reion?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

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