Question # 1

Which of the following metal oxides is antiferromanetic in nature?

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MnO₂

TiO₂

NO₂

CrO₂

At STP,a container has 1 mole of Ar,2 moles of CO₂,3 moles of O₂ and 4 moles of N₂.Without changing the total pressure if one mole of O₂ is removed,the partial pressure of O₂

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Is changed by about 26%

Is halved

Is unchanged

Change by 33%

Which factor is helping to reduce the environment pollution

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rapid growth population

urbanization

idustrialization

increase of plantation

Van der Waal's forces exist in

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Polar compounds

Non-polar

Covalent

All types of atoms and molecules

The starting substance for the preparation of iodoform is any of the following, except

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СН3СН(ОН)CН3

CH3CH2ОН

HCH2OH

CH3COCH3

Which is not an amino acid

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Lysine

Gylcine

Alanine

Aniline

Elements of group IV-A are

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neither strongly electropositive nor strongly electronegative

strongly electropositive

strongly electronegative

none of these

Correct relationship b/w Kc and Kp can be written as

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Kp=, Kc(R)∆n

Kc=Kp (RT)∆n

Kp.= Kc.(RT)∆n

Kp=Kc (R/N)∆n

lonic solids are characterized by which one of the following properties

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moderately low pressure

high vapour pressure

good conductivity in solid state

solubility in polar solvents

Which one of the following statements about glucose and sucrose is incorrect

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Both are soluble in water

Both are naturally occurring

Both are carbohydrates

Both are disacharides

When HCI gas is passed through saturated solution of rock salt, the solubility of NaCl

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Increases

May increase or decrease

Decreases

None of these

E = hv is the

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Spectral equation

Plank's equation

de Broglie's equation

None of these

Catalytic oxidation of alkanes is used for the preparation of

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Adehydes

Fatty acid

Carbonyylic acids

Ketones

Which is the most volatile compound

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Hl

HCl

HBr

HF

CsF is an ionic compound because:

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High I.P of Cs and high E.A of F.

High I.P of Cs and low E.A of F.

Low I.P of Cs and high E.A of F.

Low I.P of Cs and low E.A of F.

The substances which soften the polymer are called

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Stabilizers

Plasticizers

Retarders

Pigments

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

The vapour pressure of two liquids 'p' and 'Q' are 80 and 60 torr respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mol of Q would be

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140 torr

20 torr

68 torr

72 torr

B.O.D is connected with

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Organic matter

Microbes

Mircrobes and organic matter

None of the above

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

In 1903 Arthur Lapeworth became the first chemist to investigate a reaction mechanism. The reaction he investigated was that of hydrogen cyanide with propanone. What do we now call the mechanism of this reaction

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

UV radiations bring about

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Skin cancer

Mouth cancer

Lung cancer

Liver cancer

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