Question # 1

Which of the following elements is most metallic

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Bi

sb

As

P

Which of the following is not an electrophilic substitutional reaction of benzene?

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Free radical chlorination of benzene

Friedel Craft alkylation

Sulphonation

Nitration

If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air will

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Remains constant

Increase

Decrease

Either increase or decrease

One Joule is equivalent to

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

Soap is formed when triglyceride reacts with

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Caustic soda

Soda lime

Lime

Caustic potash

Butyric acid was named from butyrum means:

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Red out

Vinegar

Butter

Milk

The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends on

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Pressure of the gas

Temperature of the gas

Volume of the gas

Pressure,temperature,and volume of the gas.

Which of the following is precursor of T3 and T4

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Gaba

Dopa

B-Alanine

Di-iodotyrosine

Hydrolysis of protein by 6M HCl gives peptides and then alpha-amino acids. How many alpha-amino acids molecules are obtained on the hydrolysis of a tetrapeptide

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2

3

4

5

How many zones through which charge passes in a rotary kiln.

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3

4

5

6

If a strip of Cu metal is placed in a solution of FeSO4

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Cu will be deposited

Cu and Fe both dissolve

Fe is precipitated out

No reaction take place

Which one of the following pentafluorides cannot be formed?

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PF₅

AsF₅

SbF₅

BiF₅

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Elimination Esterification

Elimination Isomerisation

Oxidation Exterification

Oxidation Oxidation

Hypo is used in photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Acetylene had a characteristic ethereal smell resembling that of

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Ginger

Vinegar

Garlic

Onion

In physical and chemical properties, transition elements show

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Similarities

Dissimilarities

Both of these

Somestimes similarities, sometimes dissimilarities

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

Bronze is an alloy of Cu and

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Zn

As

Sb

Sn

The total number of rare earth elements is

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8

32

14

10

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Zn

H

S

O

Alkanes containing carbon C₁₈ownwards are

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Gases

Liquids

Waxy solids

Solids

A 4f orbital has

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one node

two node

three node

four nodes

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