Question # 1

The valence shell of hydrogen is half filled like those of

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IV - A

VIA

V - A

VIIA

Which of the following compounds will not give iodoform test on treatment with I₂/ NaOH?

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Acetaldehyde

Acetone

Butane

3-pentanone

Which of the following chlorocompounds is heat easily hydrolysed by hydorxide ion to give the product indicated

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Platinum is poisoned by

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Arsenic

Silver

Argon

Zinc

The number of de-electrons retained in Fe²⁺(At.No. of Fe = 26) ions is

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3

4

5

6

Chromic acid used to oxidize

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Aldehyde

Ketone

Both a and b

None of these

Ether show the phenomenon of :

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Position isomerism

Functional group isomerism

Metamerism

Cis-trans isomerism

A compound A has a molecular formula C₂Cl₃OH. It reduces Fehling solution and on oxidation produces a monocarboxylic acid B.A can also be obtained by the action of Cl₂on Ethanol. A is

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Chloral hydrate

CHCl₃

CH₃Cl

Chloroacetic acid

The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.2965 V at 25°C. The equilibrium constant of the reaction would be

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1.0 x 10¹⁰

2.0 x 10¹¹

4.0 x 10¹²

1.0 x 10²

Chemical equilibrium involving reactants and products in more than one phase is called

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Static

Dynamic

Homogeneous

Heterogeneous

The number of unpaired electrons in the p-subshell of oxygen atom

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1

2

3

4

Azimuthal quantum number of last electron of ₁₁Na is

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1

2

3

0

Identify the heterocyclic compound

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Toluene

Pyridine

Butanoic acid

Propenol

Enzymes are chemically

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Carbohydrates

Proteins

Fatty acids

Phospholipids

Red P can be obtained form white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crysllizing

Melting it ad pouring the liquid into water

Ionic hydrides are generally

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Liquid at room temperature

Good electrical conductors

Good reducing agents

Easily reduced

Choose the correct answer of transition elements?

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Transition elements have low melting points

Transition elements do not have catalytic activity

Transition elements exhibit variable oxidation states

Transition elements exhibit inert pair effect

The sp²hybird orbitals are oriented in space at one angle

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180°

109.5°

100°

120°

The electron in an atom

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moves randomly around the nucleus

has fixed space around the nucleus

is stationary in various energy levels

moves around its nucleus in definite energy levels

Which is not a nucleophile

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Benzene

Chlorine

Ethene

Ethanol

Which one of the following gases is used for artificial ripening of fruits

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Ethene

Ethane

Methane

Propane

Which of these polymers is an addition polymer

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Nylon 6,6

Polystyrene

Terylene

Epoxy resin

Alkyle magnesium halides are known as

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Simon-smith reagent

Tollen's reagent

Grignard's reagent

Barford's reagent

Titanium is used as a catalyst in

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Hydrogenation

Dehydrogenation

Polymerization of P.E.

Oxidation of ammonia

The colour of ppts formed by Fehling's test is

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Brick red

Red

Yellow

Orange

Which is the chain isomer of n-pentane

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Isopentane

Neopentene

N-pentene

Isopentene

Series starting from57La,42Hf -80Hg is in the period:

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4th

5th

6th

7th

Analytical chemistry is the science of :

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Chemical Characterization.

Physical Characterization.

Biological Characterization.

Biochemical Characterization.

The lanthanides contraction is responsible for the fact that

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Zr and Y have about the same radius

Zr and Nb have similar oxidsation state

Zr and Hf have about the same radius

Zr and Zn have the same oxidation satete

Drawback DDT as presticide is

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I becomes ineffective after some time

It is less effective than others

It is not easily/rapidly degraded in nature

Its high cost

Coal is used to bake bricks in lime kiln:

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40%

60%

80%

None of these

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