Question # 1

Al³⁺is a symbol for aluminium

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Atom

Ion

Cation

Anion

The example of colligative property is

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Boiling point

Osmosis

Freezing point

Osmotic pressure

In the chemical combination of hydrogen and fluorine to form HF:

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Sodium atom donates major share of its electrons.

Hydrogen atom donates the major share of its electrons.

Both the atoms share the electrons equally.

None of above.

The percentage of nitrogen in ammonia is

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80%

82%

90%

50%

What is the packet of energy called?

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Electron

Photon

Positron

Proton

A peptide having molecular mass upto 10,000 is called a

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Vitamin

Protein

Polypeptide

Dipetide

Aliphatic carboxylic acids have carboxyl group attached to:

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Alkyl group

Aryl group

Phenyl group

Benzyl lgroup

Acetic acids react with PCI5 giving:

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Acetamide

Acetyl chloride

Alcohol

Ether

Analytical chemistry is the science of :

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Chemical Characterization.

Physical Characterization.

Biological Characterization.

Biochemical Characterization.

The rate at which a substance reacts is directly proportional to its active mass and the rate of reaction is directly proportional to the product of the active masses of reacting substances, is called

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Law of conservation of energy

Le-Chateliers principle

Law of mass action

None of these

Which element among the following belongs to Group IV-A of the periodic table?

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Barium

Iodine

Lead

Oxygen

pH and pKa of the buffer are related by Henderson equation which is

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All the following decompose easily on heating to give oxygen except

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Lead nitrate

Potassium chlorate

Mercuric oxide

Manganese dioxide

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysis

Zeotropic mixture

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Obey Henry's law

Obey Raoult's law

Does not obey Raoult's law

Obey Dalton's law

Solution which distill without change in composition or temperature are called

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Amorphous

Azeotropic mixture

Ideal

Super saturated

What is formed when propanone is refluxed with an anhydrous solution of NaBH₄

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Propanal

Propan-1-ol

Propan-2-ol

Propane

The credit of discovering neutron goes to

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Rutherford

Langmuir

Chadwick

Austen

Which of the following orbitals have a dumb bell shape?

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s

p

d

f

A beaker contains 9 grams of water. The number of H-atoms is

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6.02 x 1023

3.01 x 1023

6.02 x 1024

3.01 x 1024

Lactic acid on oxidation by alkaline potassium permanganate gives

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Tartaric acid

Pyruvic acid

Cinnamic acid

Propionic acid

Which is symmetric alkene?

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CH=C-CH₂

CH≡CH

CH₃-C≡C - CH₃

B and C

In the manufacture of iron from haematitie,limestone is added to act as

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Flux

A reducing agent

Slag

An oxidizing agent

Which of the following species participate in sulphonation of benzene ring?

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H2SO4

HSO4

SO3

SO^-₂

The number of elements in the 4th periods of periodic table is

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8

10

18

32

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Acidified AgNO_3(aq)

Fehling's solution

Na

Na₂XO_3(aq)

Number of moles of the solute dissolved per dm³of the solution is knows as

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Molarity

Formality

%age

None of these

In the ground state of an atom the electron is present

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In the nucleus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

The sum of mole percent of all the components of solution is always equal to :

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Less than 100

One

100

10

A solution containing maximum amount of solute dissolved at a given temperature is called

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Saturated solution

Unsaturated solution

Supersaturated solution

Impure solution

Which of the following solution have zero pH

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1 M HCI

MH₂SO₄

0.1 M HNO₃

1 M CH₃COOH

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