Question # 1

The products of electrolysis of which of the followings are known

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Fused electrolyte

Aqueous solution of eleetrolyte

Solid electrolyte

Solid metal

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

The transition temperature of KNO3, is

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13.2°C

95.5°C

128°C

32.02°C

Industrial effluents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

Separation of low molecular weight protein from high one is

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Dialysis

Cromotography

Electrophoiesis

Ultracentrifugation

99.5% mass of lithosphere is made of

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03 elements

8 elements

11 elements

15 elements

The temp. and pressure used for PVC polymerization is

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10°C and 10 atm

20°C and 20 atm

52°C and 9 atm

100°C and 10 atm

choose the temperature among the following at which real gas obeys ideal gas laws when pressure range is appreciable:

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critical temperature

boyle's temperature

inversion temperature

transition temperature

Hardness which can be removed by boiling is called

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Permanent hardness

Temporary hardness

Stiffness

Toughness

Which of the following solids has a simple molecular lattice?

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magnesium oxide

sodium

silicon(IV) oxide

sulphur

Which property is associated with ionic solids?

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Solubility in polar solvents

Low melting points

Good conductivity in solid state

High vapour pressure

Which gasses are produced from landfills

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NH₃

H₂S

N₂

All of these

Substitution of halogen in the benzene ring requires catalyst

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AlCl₃

FeCl₃

SiO₂

Organo - nickel

Baking powder has which one of the following formula

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Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

The number of moles of CO2which contain 8.0 g of oxygen

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0.25

0.50

1.0

1.50

The oxidation number of Mn is KMnO₄is

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+2

+4

+6

+7

Solubility of a substance in water decreases with rise in temperature except

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CaCI₂. 6H₂O

Pb(NO₃)₂

K₂Cr₂O₇

Ce₂(SO₄)₃

Al is the most element in earth crust:

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O

Si

Al

Pb

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

The distillation of coal at high temperature and in absence of air is called

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Vacuum distillation

Normal distillation

Fractional distillation

Destructive distillation

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0 dm³

3 dm³

2 dm³

3 dm³

Cell in which an electric current drives a non-spontaneous reaction is called

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Electrolytic cell

Voltaic cell

Biological cell

Electrochemical cell

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