Question # 1

The attractive forces between molecules of a gas and their sizes can be ignored at

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high pressure

low temperature

low temperature and high pressure

low pressure and high temperature

In the body carbohydrates are broken down into:

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glucose

fatty acids

amino acids

nucleic acid

Ornithine is

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A basic amino acid

An essential amino acid

Present in protein structure

All of these

Alkali metals react viotlently with halogens:

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Halides

Anhydrides

Hydrides

None of the above

RNA regulate the synthesis of

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Vitamis

Carbohydrate

Proteins

Lipids

Carbon Monoxide is:

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colouriess

orderless

high toxic

All of these

Which pair of gases do not obey Dalton's law of partial pressures?

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H2 and He

NH3and HCl

H2 and O2

N2 and O2

Volcanoes produce SO₂:

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47%

57%

67%

77%

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

If rate of diffusion of A is 5 times that of B,what will be the density ratio of A and B?

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1/25

1/5

25

5

The relationship which describes the variation of vapour pressure with temperature is called

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Hess's law

Arrhenius equation

Kirchhoff's law

Clausius-Clapeyron equation

When alcohol reacts with concentreated H₂SO₄intermediate compound formed as

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carbonium ion

alkoxy ion

alkyl hydrogen sulphate

non of these

The substances that are added to the soil to provide nutrient or assential elements required for plant growth, are called

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Additives

Fertilizer

Manures

Posticides

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Hear of reaction

Heat of formation

Heat of neutralization

Heat of combustion

Which of the following nitrogen fertilizer contains more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same

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Empirical formula

Number of atoms in a molecules

Number of isomers

Relative molecular mass

An electron with n = 3 , l = 2 will be in the sub-shell

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3p

3d

3f

3s

Hybridized in carbon is:

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sp

sp²

sp³

d²sp

Gypsum added in the cement is :

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5%

10%

15%

20%

Carboxylic acids are reduced to in presence of NaAIH₄

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Esters

Acetyl chloride

alcohol

Aldehydes

The atomic radius increases as we move down a group because

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Effective nuclear charge increases

Atomic mass increases

Additive electrons are accommodated in new electron level

Atomic number increases

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

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A ketone

An aldehyde

An ether

Water

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