Question # 1

The reference calomel electrode is made from which of the following?

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ZnCI₂

CuSO₄

Hg₂CI₂

HgCI₂

All the naturally occurring processes proceed spontaneously in a direction which lead to

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Decrease of entropy

Increase of enthalpy

Increase of free energy

Decrease of free energy

Salol is prepared from

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Salicylic acid and phenol

Salicylic acid and methyl alcohol

Both

None

Which one is not a pollutant normally?

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Hydrocarbons

Carbon dioxide

Carbon monoxide

Sulphur dioxide

Covalent compounds are soluble in

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Polar solvents

Non-polar solvents

Concentrated acids

All solvents

What quantity of limestone (CaCO₃) on heating will give 56 kg of CaO?

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1000 kg

56 kg

44 kg

100kg

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Vitamin A is present in

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Liver

Milk

Green vegetables

All

Which of the following metal exhibits more than one oxidation?

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Na

Mg

Fe

AI

The substance used as a smoke screen in warfare is

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SiCI₄

PH₃

PCI₅

Acetylene

Bragg's law is given by equation

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n λ = 2 θ sin θ

n λ = 2 d sin θ

2nλ = d sin θ

nλ = 1/2 d sin θ

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

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Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

Detergents are

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Synthetic products

Natural products

Both A and B

None of the above

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

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Mercury

Lead

Nitrogen oxide

Sulphur oxide

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

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Functional isomers

Position isomers

Chain isomers

Metamers

The rotation of two carbon atoms joined by double bond would happened only if

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P_ibond is broken

Sigma bond is broken

Both bonds are broken

None of above

Reaction of acids with alcohols is also known as

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Esterification

Saponification

Alkalization

None

Which of the following substances is used as an antiknock compound?

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyl acetate

Which of the following has greatest tendency to lose electron?

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F

Fr

S

Be

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