Question # 1

Which of the following pair has the same no. of electrons in d- subshell

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Sc+3,Ti+3

Mn+2,Fe+3

Ti+3,V+3

Cr+3.Co+2

Amount of cellulose produced by plants every year is _____ approximately

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100 billion tons

90billion tons

80 billion tons

70 billion tons

All the following statements are incorrect except:

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all of the gases cannot be liquefied

increase of pressure will not decrease the inter molecular distance in a gas

gas molecules do not attract each other at very low temperature

actual volume of a gas is not negligible at very pressure

A compound X has all of the properties below. It is a liquid at 25°C it mixes completely with water it reaets with aqueous sodium hydroxide, What could X be?

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_{Ethanoic acid}

Ethene

Ethanol

Ethyl ethanoate

In a period the atomic radii

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increase

decrease

remain same

first increase, then decreased

Cholesterol is a precursor of steroid hormones, Choose the class of steroid:

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a carbohydrate

a hydrocarbon

a natural lipid

a protein a hydrocarbon

Which of the following acid is unsaturated carboxylie acid

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Malonic acid

Oxalic acid

Succinic acid

Maleic acid

Which of the followings has electronic configuration of Ar in +3 oxidation state

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Sc

Mn

Ti

Zn

Which of the following is not a charbohydrate

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Nuclic acid

Starch

Glycoyen

Cellulose

Which of the following is electrophile for alkylation?

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NO+2

SO3

R+

Both a & b

In which of the following types of reactions are the carbonyl compounds and alkene are similar in behaviour

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Nucleophilic addition

Electrophilic addition

Nucleophilic suhstitution

Catalytic hydrogenation

The open chain compounds are also called

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Aliphatic

Alicylic

Aromatic

Both a and b

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Reaction occurs at STP

Reaction is exothermic

Reaction is endothermic

Number of moles of production and reactant are same

The factor which effect the rate of reaction

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Nature of reactants

Surface area

Light

All of the above

Eutrophication causes reduction in

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Dissolved hydrogen

Dissolved oxygen

Dissolved salts

All the above

Mass of simple electron is:

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9.1 x 10^-31 kg

9.1 x 10^-30 kg

1.66 x 10^-31 kg

9.1 x 10^-31 kg

Which of the sub-atomic particles is not charged

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Electron

Proton

Neutron

All of them

Dipole moment of CO molecule is:

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0.0

1.112 D

0.112 D

2.112 D

Swage water is purified by

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Microorganisms

Light

Fishes

Aquatic plants

Among the nitrogen containing fertilizer, the one with about 82% nitrogen content is

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Ammonium nitrate

Ammonia

Ammonium phosphate

Ammonium sulphate

In an exothermic reaction, a 10° rise in temperature will

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Decrease the value of equilibrium constant

Double the value of K_c

Not produce any change in K_c

Produce some increase in K_c

Pb has inert pair of electrons:

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One

Two

Three

Four

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