Question # 1

The unit rate of a reaction can be increased in general by all the factors except by

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Using a catalyst

Increasing temperature

Increasing the activation energy

Increasing the conc. of reactants

What happens when isotonic solution of a (mol. wt. 342) and B (mol. wt 60) are put in to communication through semiperme-able membrane?

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Transference of solvent from solution A to that of B take place

Transference of solvent from solution B to that of A takes place

No transference of solvent from solution A to that of B takes place

Change in temperature of solutions takes place.

ΔH_{neutralisation}is always

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positive

Negative

Zero

Positive or negative

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2SL2

Wurtz reaction

Liquification of natural gas

None of these

The total pressure exerted by a number of non-reacting gases is equal to the sum of partial pressure of the gases under the same conditions is known as

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

Which of the following species participate in sulphonation of benzene ring?

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H₂SO₄

HSO^-₃

SO₃

SO^-₂

Which inorganic precipitate acts as semipermeabale membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

The number of electrons in the M shell of the element with atomic number 24 is

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24

12

13

8

Saturated solution of NaCl on heating becomes

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Super saturated

Unsaturated

Remains saturated

None

Addition of iron fillings to CuSO₄solution caused precipitation of Cu owing to the

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Reduction of Cu²⁺

Oxidation of Cu²⁺

Reduction of Fe

Reduction of Fe³⁺

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

One mole of gas refers to

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The number of molecules in one litre of gas

The number of molecules in one gram of gas

The number of molecules contained in 12 grams of ¹²C isotope

The number of molecules in 22.4 litres of a gas at S.T.P.

Which one is the property of an ideal solvent?

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Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

Reaction of ethylamine with chloroform in alcoholic KOH produces

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

The pure crystalline substance on being heated gradually first forms turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears. The behaviour is a characteristic of substance forming

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Allotropic crystal

Liquid crystals

Isomeric crystals

Isomorphous crystals

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

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Sc³⁺

Ti³⁺

Cu⁺

Zn²⁺

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