Question # 1

Most hazardous metal pollutant of automobile exhaust is

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Mercury

Lead

Cadmium

Copper

The substance having highest conductivity at room temperature among the following is

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0.1 N HCl

0.1 N NaCl

Graphite

Glass

The method involved for electrolysis of Na or K salts of carboxylic acids

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Sabatier's sendrens reaction

Kolbe's method

Clemmensen

Wolf kishner reduction

Compounds X, Y and Z, all react with PCI₅to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z

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Two vitamins absorbed from intestine along with fats are

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A, D

A, B

A, C

D, B

The essential component of organic compound is

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O

C

P

N

Ethylene can be prepared in the laboratory by heating together ethyl alcohol and

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HCI

Phenol

HF

H₂SO₄

When propanamide reacts with Br₂and NaOH then which of the following compounds is formed?

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Ethyl alcohol

Propyl alcohol

Propyl amine

Ethylamine

The four bonds of carbon in methane are directed towards the corners of

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Cube

Pentagon

Hexagon

Tetrahedron

Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

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First order

Pseudo first order

Second order

Zero order

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

Carbon atom holding halogen in aryl halides is

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sp²-hybridesed

sp³-hybridesed

sp-hybridesed

sp³d-hybridesed

Acetic acid is manufactured by:

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Distillation

Fermentation

Ozonolysis

Esterification

When electric current is used to carry out non-spontaneous redox, the process is called

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Hydrolysis

Electrolysis

Decomposition

Neutralization

In sixth period 14 of its transition elements are called

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Lanthanides

Actinides

Radioactive elements

None

Series starting form ₃₉Y to ₄₈CD is in period:

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4th

5th

6th

7th

On passing ethane into concentrated suphuric acid the intermediate compound formed on hydrolysis with boiling water gives

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Methyl alcohol

Ethyl alcohol

Ethyl hydrogen sulphate

Methyl hydrogen sulphate

Freezing point depression is measured by

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Beckmann's apparatus

Lands Berger's method

Antifreeze apparatus

All of the above

Toluene is also called

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Hydroxyl benzene

Methyl benzene

ethyl benzene

None

The reaction rate is expressed in the units of

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mol dm^-3S^-

mol dm^-3

mol dm^-3N^-

dm^-3S^-

Which of the following is the strongest acid?

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CF₃COOH

CBr₃COOH

CH₃COOH

CCl₃COOH

Which of the following compounds will react with Tollen's reagent

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Which step is unnecessary for purification of water for drinking purposes

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Aeration

Coagulation

Treatment with chlorine

Treatment with iodine

The total number of inner transition elements in the periodic table is

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10

14

28

30

Where energy is released during a reaction it is

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Exothermic reaction

Endothermic reaction

A free radical reaction

A bond breaking reaction

Which of the following molecules have its central atom sp²hybridized

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CH₄

C₂H₂

C₂H₄

CCl₄

Which is the polymer that has amide linkage in its structure

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PVC

Poly ethene

Polyester

Nylon

Solvent extraction is an unstable,Process and it is controlled by:

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Alcohol extraction

Petrol extraction

Phenol extraction

Ether extraction

Which of the following is not related to transition metals

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They have a high tensile strength

They are ductile

They are malleable

They have low melting points

10g of NaOH has been dissolved per kg of solvent. The molality of solution is :

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.25 m

1.5 m

.5 m

2.5 m

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