Question # 1

At 25°C, the highest osmotic pressure is exhibited by 0.1 M solution of

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CaCl₂

KCl

Glucose

Urea

As a fixing agent in photography, sodium thisoulphate is used for

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Dissolving out unreacted silver bromide

Converting silver

Reducing solubility of AgBr

Preventing overdeveloping and fogging

Which of the following is not a fatty acid

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

In endothermic reaction, the heat content of the

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Products is more than that of reactants

Reactants is more than that of products

Both a and b

None of the above

Metallic conduction is also called as :

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Ionic conduction.

Protonic conduction.

Electronic conduction

Super conduction

DDT is formed from

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Benzene and Chlorobenzene

Chloral and Chlorobenzene

Chloral and Benzene

Chlorobenzene and chlorine

Mustard gas is a :

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Gas

Liquid

Solid

High boiling point

Bronze is an alloy which contains

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60% cu

70% cu

80% cu

99% cu

The catalytic prmoter used for the industrial preparation of acetaldehyde is

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PdCI₂

CuCI₂

Pd + CaCI₂

None of these

Which is not true about acetophenone?

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Reacts to form 2,4-dintrophenyl hydrazine

Reacts with Tollen's reagent to form silver mirror

Reacts with I₂/NaOH to form iodoform

On oxidation with alkaline KMnO₄followed by hydrolysis gives benzoic acid

Unsaturated hydrocarbon containing a double bond are called

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paraffin

Alkanes

Olefins

Acetylene

Common names of carboxylic acids are given by then:

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Source

Person discovered

place

habit

General formula of alcohol is:

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ROH

Ar-OH

R-O-R

Ph-OH

Which metal is used in the thermit process because of its activity?

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Iron

Copper

Alumnium

Zinc

When SO₂is passed through acidified K₂Cr₂O₇solution

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The solution turns blue

The solution is decolourised

SO₂is reduced

Green Cr₂(SO₄)₃is formed

The three N - Hσ-bonds are made by

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sp³- s overlap

sp²- s overlap

P - p overlap

sp - overlap

The bond order O₂molecule is

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1

2

3

Zero

Sintered glass is porous material used for:

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Absorption

Decoration

Filtration

All of above

The widely used nitrogen fertilizer that contains about 46% nitrogen is

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Ammonia

Ammonium nitrate

Ammonium sulphate

Urea

One mole of C₂H₅OH contains the number of H-atoms

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6.02 x 10²³

3.61 x 10²⁴

1.81 x 10²⁴

6.02 x 10²⁴

Carbolic acid is the other name for

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Methanol

Ethanol

Propanol

Phenol

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Elimination Esterification

Elimination Isomerisation

Oxidation Exterification

Oxidation Oxidation

The oxyacids of phosphorus in which phosphorus has the lowest oxidiation state is

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Hypophosphorus acid

Orthophosphorus acid

Pyrophosphorus acid

Metaphosphorus acid

An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B . Compound B gives blue colour salt in Victor Meyer's test.The compounds A and B are respectively

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Acetaldehyde, tertiary butyl alcohol

Acetaldehyde, ethyl alcohol

Acetaldehyde, isopropyl alcohol

Acetone, isopropyl alcohol

Catalytic oxidation of alkanes is used for the preparation of

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Adehydes

Fatty acid

Carbonyylic acids

Ketones

According to Raoult's law

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Relative lowering of V.P. is equal to mole fraction of solute

The lowering of V.P. is directly proportional to mole fraction of solute

V.P. of solvent above solution is equal to product of V.P. of pure solvent and mole fraction of solvent ins solution

All of the above

Which bond is most stable

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C - Cl

C - F

C - Br

C - I

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

Which factor is helping to reduce the environmental pollution

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Rapid growth of population

Urbanization

Industrialization

Increase of plantation

Sodium forms largely

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Normal oxides

Per-oxides

Superoxides

None of these

Solvay process is used in the manufacture of

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Na₂CO₃

NaHCO₃

CaCl₂

All

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