Question # 1

Amorphous substance show

(i) Short and long range order

(ii) Short range order

(iii) Long range order

(iv) Have no sharp melting point

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(i) and (ii) are correct

(ii) and (iv) are correct

(ii) (iii) and (iv) are correct

(i) and (iv) are correct

Group of element belongs to IIB group

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Zn. Cd. Hg

Cu. Ag. Au

Sc. Y. La

Ni. Pd. Pt

Monosacharide belong to the group

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Fats

Carbohydrates

Lipids

Proteins

The number of atoms or molecules whose concentrations determines the rate of a chemical reaction is called the

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Molecularity of the reaction

specific activity of the reaction

Order of the reaction

rate constant of the reaction

Contamination of water of tanning industries is due to:

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Cr(III)

Cr(VI)

Mn(III)

Mn(VII)

Lanthanides an actinides belong to following group of periodic table:

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IB

VIIIB

IIB

IIIB

The rate of reaction for a reaction is 30 mol dm-3sec-1 if the product of concentration of 10.reactant is unity the specific rate constant is

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25

2.5

30

15

Which one of the following elements is most electropositive out of group I -A and II-A group?

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K

Mg

Na

Ca

Type of polymer formed by teh polymerization of single type of monomer is:

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Homopolymer

Copolymer

terpolymer

All of these

Amount of ozone in atmosphere is expressed in units:

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Kilograms

cm

molarity

DU

Lead pollution is mainly due to

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Metallic pollution

Space pollution

Acid rain

Cd pollution

The 95.5% mass of Lithosphone is made of 11 elements i.e. O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. which element is present in trace amount

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Iodine

Bromine

Lead

Carbon

The electrophile in aromatic sulphonation is

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H₂SO₄

HSO₄

SO₃

SO₃⁺

The simplest and the parent members of aromatic hydrocarbon is

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Benzene

Toluene

Biphenyis

Naphthalene

Heavy water is obtained by

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Prolonged electrolysis of water

Dissolving heavy salt in water

Simple distillation of water

Removing impurities of calcium and magnesium form water

Which of the following reaction is characteristic of benzene

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Electrophilic substitution reaction

Reduction

Oxidation

Ozonolysis

Which is the most volatile compound

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Hl

HCl

HBr

HF

Products of coal is:

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Peat

Lignite

Bituminous coal

All above

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Neutrons are attracted by nucleus

Neutrons carry out nuclear reactions

Neutrons carry no charge

Neutrons are electromagnetic radiations

The reference electrode is made by using

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ZnCl₂

CuSO₄

HgCl₂

Hg₂Cl₂

10 ml of 1.5 M NaOH solution is neutralized by 20 ml of a-M HCl solution. The value of 'a' will be

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1.0

0.75

0.5

0.25

______ is used in breathing equipments for mountaineers and in space craft

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Li₂O

BeO

N₂

KO₂

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