Question # 1

The smallest unit of a crystal that shows all the characteristic properties of its pattern is called

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cell

electrolyte

unit cell

crystal

Which of the following will undergo nucleophilic addition reaction more easily?

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Aldehyde

Alkene

Aldehyde and ketone equally

Neither aldehyde nor alkenes

What is not true for NH4CI

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It has ionic bond

It has covalent bond

It has coordinate bond

It has hydrogen bond

Which oxide when mixed with water, will produce the most acidic solution?

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CO

CO₂

SiO₂

P₂O₅

The structure of sodium chloride is

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simple cube

body centered cubic

face centered cubic

depends upon conditions

Surfactants are organic compounds; used in detergents which reduce the

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viscosity of water

surface tension of water

boiling point of water

wetting ability of water

Tasteless sugars are:

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monosaccharides

trisaccharides

oligo saccharides

poly saccharides

Which of the following element has high m.p and b.p, it acts as a reducing agent, and can react with bases?

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Sr

Ca

Be

Mg

suppose that an ocean of mercury replaced all the air of the air of the earth . How deep would this ocean have to be to exert the same pressure as the air:

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77cm

76cm

79cm

78cm

Most reactive among the following

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Li

Mg

Ca

Na

The degree of unsaturation in fats or oils is usually measured by numbers of grams of iodine required by 100 grams of fat, this is called

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oil number

saturation number

iodine number

un saturation number

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.

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CHF Cl C FCl

CH Cl CF₂Cl

CHF CF₂Cl

C FCl CF₂Cl

If half life period of a reaction is independent of the concentration of the reactants, then the reaction is

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Zero order

First order

Second order

Order is in fraction

Which of the following is not affected by light

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Which alcohol gives only one oxidation product when wormed with dil acidified K₂Cr₂O₇

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Butan-1-ol

Butan-2-ol

2-methyl propan-1-ol

2-methyl propan-2-ol

DNA is a polynucleic acid. The monomer is known as a nucleotide. What is not the component of the nucleoptide

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Phosphate group

Deoxy ribose sugar

Uracil base

Adenine base

Identify the heterocyclic compound

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Toluene

Pyridine

Butanoic acid

Propenol

Which is the used as test for the presence of alkenes

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Reaction of cold dilute alkaline KMnO₄

Combustion

Polymerization

Catalytic hydrogenation

The amount of electricity that can deposit 108 g of silver from silver nitrate solution is

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1 ampere

1 coulomb

1 faraday

2 ampere

Purines include

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Adenine

Guanine

Both a and b

None

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Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

Although hydrogen resemble with the elements of group lA, IVA and Vll but it is usually placed in

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Group IA

Group IV A

Group VII

Group VIII

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