Question # 1

Why a C - Cl bond breaks by uv light

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Cl is most electronegative

Cl is volatile

C - Cl bond energy is smaller than that of C - H bond energy

Uv light provides energy which is sufficient to break C - Cl bond and not C - H bond

Which of the following is not a macromolecule?

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diamond

graphite

iodine

silica

For a chemical reaction which can never be a fractional no

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order

molecularity

half-life

rate constant

Which among the following will show anisotropy?

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Wood

Glass

Paper

BeCl2

Term ozone hole is used for depletion of ozone during months of:

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Jan-Feb

March - Sep

Sep- Nov

Dec-Feb

^{The common oxidation number of halogens is}

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-1

+1

-2

0

CO₂gas is dissolved in water due

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dipole-dipole interactions

higher molecular mass of CO₂

ion dipole attractive forces

hydrogen bonding

Hexamethylene reacts with _______ to prepare nylon 6,6

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acetic acid

adipic acid

formic acid

none of above

Which of the following transition metal forms colourless compounds in +4 oxidation state?

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Ti

Cr

Cu

Zn

Which is the correct order of boiling points

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structure of ice

solution of ethanol in water

solution o fNaCl in benzene

linking of helix protein molecule

The number of molecules in one dm³of water is close to:

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6.02/22.4 x10²³

12.04/22.4 x10²³

18/22.4x 10²³

55.6x6.02x10²³

Alcohols are named by replacing 'e' of alkane with:

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al

ene

ol

one

The process in which water molecules surround solute particles is called

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Hydration

Salvation

Hydrolysis

Dehydration

The solubility product of AgCl is 2.0 x 10^-3 mol² dm^-6 , The maximum concentration of Ag ion in the solution is :

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2.0 x 10^-10 mol dm^-3

1.41 x 10^-10 mol dm^-3

1.0x 10^-10 mol dm^-3

4.0x 10^-10 mol dm^-3

Acetone is prepared by

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Oxidation of n-propyl alcohol

Oxidation of acetaldehyde

Pyrolysis of calcium acetate

Pyrolysis of calcium acetate as well as acetic acid

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+712 KJ mol^-1

+492 KJ mol^-1

-932 KJ mol^-1

-960 KJ mol^-1

The state of hybridization of carbon atom in methane is:

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sp³

sp²

sp

dsp²

Which is liquid among the following alkenes?

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Ethane

Propene

Butene

Pentene

Phenol was discovered by:

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Hofmann

Runge

Henderson

Bakelite

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

Primary and secondary alcohols on action of red hot copper give

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Aldehydes and ketones respectilvely

ketones and aldehydes respectively

Only aldehydes

Only ketones

In sp²hybridization bond angle is _____

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120°

180°

109.5°

None

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