Question # 1

The value of SHE is cathode and anode is always taken to be

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One

Zero

Different

Same

Fluorine molecule is formed by

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The axial p-p overlap

The sidewise p-p overlap

The axial s-p overlap

The overlap of two sp²hybrid orbitals

When fused PbBr₂is electrolyzed

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Bromine appears at he cathode

Lead is deposited at the cathode

Lead appears at the anode

None of these happens

The rate of reaction determined at a given time is called

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Average rate

Instantaneous rate

Specific rate

Overall rate

The treatment of benzene with isobutene in the presence of sulphuric acid give

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isobutyl benzene

tert-Butyl benzene

n- Butyl benzene

no reaction

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4 mole per dm³

2 mole per dm³

0.33 mole per dm³

0.67 mole per dm³

The degree of polarity of molecule is known as its

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Dipole moment

Moment arm

Bond energy

Ionic character

Gasoline is a mixture of hydrocarbons containing carbon atoms

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5 to 10

5 to 8

5 to 12

5 to 11

If two lone pairs are present then bond angle of tetrahedral compound reduces to ______ degrees

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109.5°

107.5°

104.5°

None

Compound X has molecular formula C₁₀H₁₄O and is unreactive towards mild oxidising agents. What is the structure of the compound formed by dehydration of X

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Ozone hole is maximum over

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Europe

Antarctica

Asia

Africa

Copper oxide is dedected by borax bead test with colour:

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Blue

Red

Yellow

Black

Cracking products are :

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Only alkanes

Only alkenes

Alkanes and alkenes

Alkynes

Which one of the following is not a nucleophile

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H₂O

H₂S

BF₃

NH₃

Each vertical column of the periodic table includes elements with chemical characteristics that are in general

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Identical

Similar

Different

Similar as well as different

The example of a photo chemical reaction is photosynthesis has order of reaction :

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1

2

0

3

Which of the following is correct?

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Reduction of any aldehyde gives secondary alcohol

Reaction of vegetable oil with H₂SO₄gives glycerine

Alcoholic iodine with NaOH gives iodoform

Sucrose on reaction with NaCl gives invert sugar

A bond between two atoms may be obtained by sharing of electrons such a bond is called

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An ionic bond

A coordinate bond

A dative bond

A covalent bond

Refrectrometric method is used when

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Reactions involving absorption of I.R. or U. V

Reactions involving change of refractive index

Reactions involving ions

Change of optical activity

An electrolyte

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Forms complex ions solution

Gives ions only when electricity is passed

Possesses ions even in solid state

Gives ions only when dissolved in water

Which is a reagent for Lucas test

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ZnCl₂+ Conc. HCl

Zn

Na

Br

The reaction of sodium with ethanol gives

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CH₃OH

NaH

H₂O

H₂

Who gave the concept of atomic number

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Newton

Mosley

Dalton

Newland

What happens when isotonic solution of A (mol.wt.342) and B (mol.wt 60) are put in to communication through semipermeable membrane?

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Transference of solvent from solution A to that of B take place

Transference of solvent from solution B to that of A takes place

No transference of solvent from solution A to that of B takes place

Change in temperature of solutions takes place

Absolute alcohol is obtained by adding rectified apirit in alcohol:

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Water

Na₂CO₃

NaOH

CaO

Preparation of vegetable ghee involves

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Halogenations

Hydrogenations

Hydroxylation

Dehydrogenations

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 organic compounds which are derivative of hydrocarbons of oxygen are:

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Carbohydrates

Phenols

Alcohals

All of these

Which of the following is not the reactions of lithium

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There are 20 amino acids found in protein which is not the property of these amino acids

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They are allα-amino acids

They are all optically active

They have high decomposition point

They are water soluble

Energy of electron in the infinite Bohr orbit of H-atom is

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0 KJ/mole

1 KJ/mole

-1 KJ/mole

-1313.32 KJ/mole

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