Question # 1

Which of the following mineral does not contain Al?

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Cryolite

Mica

Feldspar

Fluorspar

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

When excess of SnCl₂is added to a solution of HgCl_{2, a white precipitate turning to grey is obtained. They grey colour is due to the formation of}

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Hg₂Cl₂

SnCl₄

Sn

Hg

A clathrate may be defined as a

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Cage compound

Liquid crystal

Mixture

Solid solution

Which of the following transition metal ions will have definite value of magnetic moment?

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Sc³⁺

Ti³⁺

Cu⁺

Zn²⁺

Hess's law deals with

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Changes in heat or reaction

Rate of reaction

Equilibrium constant

Influence of pressure on volume of a gas.

Ozane is not

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An allotrope

A powerful oxidizing agent

Paramegnetic

a bent molecule

Sea weeds are important source of

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Iron

Chlorine

Iodine

Bromine

A solution of sodium sulphate was electrolysed using some inert electrodes. The products at the electrodes are

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O_2,H₂

O_2,Na

O_2,SO₂

O_2,S_2O^2-₈

Inert pair effect plays an important role in case of

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F

Al

Si

Tl

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

Calcium acetate when dry distilled gives

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Formaldehyde

Acetaldehyde

Acetone

Acetic anhydride

Gooch Crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

In public urinals, we observe some nascent smell. This smell is due to

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Hydrolysis of urea of urine by urease of atmosphere into NH₃and CO₂

Formation of sulphonic acid by urea of urine

Reaction of CO₂of atmosphere with urea mononitrate in urine

Hydregen present in air reacts with nitrogen forming NH₃

A certain current liberate 0.5 g of hydrogen in 2 h. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution?

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12.7 gm

15.9 gm

31.8 gm

63.5 gm

Which of the following reaction is used for detecting presence of carbonyl group?

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Reaction with hydroxylamine

Reaction with hydrazine

Reaction with phenyl hydrazine

All

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