Question # 1

Sodium thiosulfate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

The rate of a reaction that does not involve gases does not depend upon

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Pressure

Temperature

Concentration

Catalyst

Red lead is

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PbO

Pb₃O₄

PbO₂

Pb₄O₃

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

Wholer prepared ures from

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Ammonia

NH₄CNO

NH₃

uric acid

With increasing principle quantum number the energy difference between adjacent energy levels in H atom

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Decreases

Increases

Remains constant

Decreases for low value of Z and increases for higher value of Z.

Reaction of ethylamine with chloroform in alcoholic KOH producers

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

Which of the following represents elements in order of increasing atomic size?

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I,Br,CI

Na,Mg,C

C,N,O

Li,Na,K

In Friedal-Craft's alkylation besides AICI3 the other reactants are

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C6H6 + NH3

C6H6 + CH4

C6H6 + CH3CI

C6H6 + CH3COCI

The molal elevation constant is the ratio of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

The reaction/method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halid.

When sulphur is boiled with Na₂SO₃solution, the compound formed is

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sodium sulphides

Sodiums sulphates

Sodium persulphate

Sodium thiosulphate

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

The number of oxygen atoms in 4.4 g of CO₂is approximately

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1.2 x 10²³

6 x 10²²

6 x 10²³

12 x 10²³

According to MO theory, the species O⁺₂

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Bond order of 2.5

Three unpaired electrons

Diamagnetic character

Stability lower then O₂

The mass of the neutron is of the order of

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10^-23kg

10^-24kg

10^-26kg

10^-27kg

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

Saturated solution of NaCl on heating becomes

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Super saturated

Unsaturated

Remains saturated

None

Fertililzer are made by

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Nature only

Artificial methods only

Both artificial and natural methods

None of the above

Bragg's law is given by equation

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nλ= 2θsinθ

nλ= 2 d sinθ

2 nλ= d sinθ

nλ= 1/2 d sinθ

Which quantum number is sufficient to describe the electron is hydrogen

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ι

n

m

s

Which is the most amphoteric?

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Na₂O

MgO

Al₂O₃

CaO

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