Question # 1

Ketones are reduced to

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Primary alcohol

Secondary alcohol

Tertiary alcohol

All of these

Which structure shows a primary alcohol

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A white precipitate ofsilver chlorideimmediately formed on additionof :

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Silver nitrate solution to sodium chloride solution.

Silver chloride solution to sodium nitrate solution.

Silver nitrate solution to potassium chloride solution

Silver nitrate solution to hydrogen chloride solution.

The prosthetic group in glycoprotein is

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Carbohydrate

Fat

Vitamin

Nucleic acid

While balancing an equation by ion electron method, the number of oxygen atoms are balanced by

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OH^-

H₂O

O₂

H⁺

In chromatography, the point at which solvent maximum rises called:

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Solvent front

Base line

Element

Chromatogram

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Three times

Six times

Nine times

Two times

Which is mild oxidizing agent ?

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Tollen's reagent

KMnO₄ / H₂SO₄

K₂Cr₂O₇ / H₂SO₄

HNO₃

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Step 1 Step 2

HCI HCN

HcN,NaCH H₂SO₄

H₂SO₄ K₂Cr₂O₇/H₂SO₄

KCN HCI

The number of antibonding electron pairs in O^2-molecular ion on the basis of MOT is

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4

3

2

5

Which oxide of nitrogen is obtained on heating ammonium nitrate at 250° C?

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Nitric oxide

Nitrous oxide

Nitrogen dioxide

Dinitrogen tetraoxide

Ecosystem is a smaller unit of

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Solvent extraction method is a particularly useful technique of separation when the product to be separated is:

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non-volatile or thermally unstable.

volatile or thermally stable.

non-volatile or thermally stable.

volatile or thermally unstable.

Which of the following is a transition element

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Sr

Sn

Cr

Pb

The arrangement of subshells in the ascending order of their energy on complete filing of 4f subshell the entering electrons goes to

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5s

5p

5d

5f

Reactivity of alkyl halides with magnisium is of the order:

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Rl > RBr> RCl > RF

RBr > RCl >RF > Rl

RCL > RF > Rl > RBr

RF >RI >RBr > RII

Terylen fibre is made by reaction of terephthalic acid with

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Ethylene

Ethylene glycol

Glycol

Terylene

Most transition elements show

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Diamagnetic behavior

Ferromagnetic behavior

Paramagnetic behavior

None of these

Which of the following statement about electron affinity of two elements is correct

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Carbon has greater than oxygen

Sulphur has less than oxygen

Iodine has greater than bromine

Bromine has less than chlorine

Classical smog occurs in palces of

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Excess SO₂

Low temperature

High temperature

Excess NH₃

Negatively charged particle nature of cathode rays was first demonstrated in 1895 by:

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Millikan.

J. Perrin.

Hittrof

J.J. Thomson.

In electronic watches or electronic calculators the tiny batteries used are

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Alkaline battery

NICAD battery

Fuel cell

Silver oxide battery

How many cm³of 1 M H₂SO₄required to neutralize 10 cm³of 1 M NaOH

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2 cm³

2.5 cm³

5 cm³

10 cm³

The state of hybridization of carbon atom in methane is:

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sp³

sp²

sp

dsp²

When CO₂is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

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Propane

Propanoic acid

Propanal

Propanol

Etherification is catalyzed by

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Acids

Gases

Salts

None of the these

The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration, K equilibrium is

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0.5

1.5

2.5

2.0

Which of the following is obtained by condensation polymerization?

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Polyethene

Teflon

Phenol formaldehyde resin

Nitrile rubber

The process of osmosis was first discovered by

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Nollet

Pfeffer

Traube

Dutrochet

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

AgCl is soluble is

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Aqua regia

H₂SO₄

HCl

NH₃

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