Question # 1

Which of the following salts would give the same products irrespective of whether its molten form or concentrated aqueous solution is electrolysed?

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Magnesium bromide

Magnesium sulphate

Copper sulphate

Copper chloride

An ideal gas cannot be liquefied because

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Its critical temperature is always above 0°C

Its molecules are relatively small in size

It solidifies before becoming a liquid

Forces operative between its molecules are negligible.

Which of the following liquid has highest bolling point

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HCI

HBr

H2O

Br2

At higher temperature isotherm moves away from both the axes because of increase in

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Pressure

Volume

Number of moles

All

There is more deviation in the behaviour of a gas from the ideal gas equation PV = nRT

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At high temperature and low pressure

At low temperature and high pressure

At high temperature and high pressure

At low temperature and low pressure

Which of following is NOT use the polyvinylacetate (PVA)

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An adhesive material

Binder for emulsion

Used as gramophone

None as these

When water freezes at 0°C, its density decreases due to

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cubic structure of ice

empty spaces present in the structure of ice

change of bond lengths

change of bond angles

NH₃gas is liquefied more easily than N₂Hence

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Van der Waals constants a and b of NH₃> that of N₂

Van der Waals constants a and b of NH₃< that of N₂

a(NH₃) > a (N₂) but b (NH₃) < b(N₂)

a (NH₃) < a (N₂) but b (NH₃) > b (N₂)

Carboxylic acid having three carboxyl groups are:

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Mono carboxylic acid

Di-carboxylic acid

Tri-carboxylic acid

Tetra carboxylic acid

Requirement of macronutrient per acre of the land is

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5 to 200 kg

20-200 kg

200-400 kg

30-400 kg

The unit of peptides is

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Moiety

Residue

Polypeptide

Both A and B

The colour of transition metal complexes is due to

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d-d transitions of electrons

Para magnetic nature of transition elements

Ionization

Loss of s-electrons

Which electronic configuration corresponds to an element of Group ||Z-A of the periodic table?

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1s, 2s², 2p⁶, 3s², 3p⁶, 4s²

1s², 2s², 2p⁶

1s², 2s², 2p⁶, 3s², 3p³

1s², 2s² , 2p⁶, 3s², 3p¹

Elevation of boiling point is measured by

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Beckmann's apparatus

Lands Berger's method

Antifreeze apparatus

None of these above

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Zero

1

2

1.5

Lysine is ______ amino acid

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Acidic

Basic

Natural

None of these

Smallest charge of electricity that has been measured so far is

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Charge on a-rays

Charge on electron (1.602 x 10^-19C)

Charge on x-rays

Charge on gamma rays

What will happen if LiAIH₄is added to an ester?

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Two units of alcohol are obtained

One unit of alcohol and one unit of acid is obtained

Two units of acids are obtained

None of these

The formula of lime stone is

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CaCl₂

MgCO₃

Na₂CO₃

CaCO₃

Mercury is the only metal which is liquid at 0°C. this is due to its

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Very high ionization energy and weak metallic bond

Low ionization potential

High atomic weight

High vapour pressure

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

Which of the following is a constituent of nylon?

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Adipic acid

Styrene

Teflon

None of these

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