Question # 1

Which of the following will affect the rate :

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First step of reaction.

Last step of reaction.

Rate determining step.

Fastest step.

Rutherford's model of atom failed because:

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The atom did o have a nucleus and electrons

It did not account fro the attraction b/w protons and neutrons

It did no account for the stability of the atom.

There is actually no space b/w the nucleus ad the electrons.

The temp. used for the hydrogenation of alkenes using Ni is

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2000°C

400°C

200-- 300°C

1000°C

In an experiment the concentration of a reactant 'A' is doubled the rate increases four times. If concentration in tripled, then rate increases nint times. Thus the rate is proportional to ______ of concentration of 'A'

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Square root

Square

Twice

Cube

A substance which increases the rate of a reaction without being consumed during the reaction is called

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An autocatalyst

A catalyst

A negative catalyst

All of these

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Forward reaction is favoured

Backward reaction is favoured

No effect

None of the above

The catalytic activity of Pt is much higher when

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It is mixed with asbestos

It is mixed with Pd

It is mixed with arsenic

In is made colloidal platinum

Chief ore of aluminium is:

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Na₃AIF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃ .H₂O

Which compound is more soluble in water

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C₂H₅OH

Benzene

CH₃OCH₃

Hexane

The total number of transition elements is:

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10

14

40

50

The substance which is present in large quantity is called a :

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Solute

Solvent

solutiion

None of Above

1-butene an 2-butene are an example of

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Chian isomerism

Positional isomerism

Metamerism

Functional group isomerism

Which of the following posses linear geometry

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Alkane

Alkene

Alkyne

Benzene

Rusting can be avoided by :

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Making alloys

Tin or Zinc plating

Use of enamel

All of these

The amount of products obtained from the balanced chemical equation is regarded as

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Theoretical yield

Actual yield

% yield

Experimental yield

Write the name of following compound

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5 - methyle - 2- hexene

2 - methyle hexene

4 - ethyle - 2 - methyle hexene

3 - ethyle - 3 - methyl hexene

The number of unpaired electrons in Mn²⁺is

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5

4

3

2

The boiling point of heavy water is

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108°C

101.4°C

99°C

110°C

For which mechanisms, the first step involved is the same:

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E₁ and E₂

E₂and SN₂

E₂ and E₁

E1 and SN₁

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Zero

253 sec

150 sec

500 sec

The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is

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Microwave > infrared > visible > ultraviolet

Visible > ultraviolet > microwave > infrared

Ultraviolet > visible > infrared > microwave

Infrared > microwave > ultraviolet > visible

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Potassium chromate has formula

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KClO₃

K₂CO₃

K₂CrO₄

K₂Cr₂O₇

Increasing skin cancer and high mutation rate are due to

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Acid rain

Ozone depletion

CO pollution

CO₂Pollution

Treatment of a secondary alcohol with a suitable oxidizing agent (K₂Cr₂O₇) results in the formation of

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Ketone

Aidehyde

Ether

Alkyl halide

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

Lower carboxylic acids are soluble in water due to

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Low molecular weight

Hydrogen bonding

Dissociation into ions

Easy hydrolysis

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

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

Which compound is more soluble in water?

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C₂H₅OH

C₅H₅OH

CH₃OCH₃

n-Hexanol

Which of the following substances is used as an antiknock compound?

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Tetraethyl lead

Lead tetrachloride

Lead acetate

Ethyle acetate

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