Question # 1

Benzene does not undergo polymerization and it is also resistant to

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Reduction

Oxidation

Alkylation

Ozonolysis

For a given process, the heat changes at constant pressure (q_p) and at constant volume (q_v) are related to each other as

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q_p= q_v

q_p< q_v

q_p= qv/2

n + l value for 4f will

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2

5

7

9

The number of neutrons in the element ⁹₄Be is

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4

5

9

13

An electrophile may be

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Positive

Negative

Neutral

Both c and a

Protein are classified into

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Simple protein

Complex protein

Derived proteins

All of these

Lactic acid on oxidation by alkaline potassium permanganate gives

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Tartaric acid

Pyruvic acid

Cinnamic acid

Propionic acid

Which three elements are needed for the healthy growth of plants

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N, S, P

N, Ca, P

N, P, K

N, K, C

All 3d series elements show variable oxidation states. The one shown by all 3d elements is

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+2

+3

+4

+5

Internal energy of a system is equal to

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Kinetic energy of particles

Potential energy due to binding forces between particles

Sum of kinetic energy plus potential energy of the particles

Heat contents

The total number of orbitals possible for the quantum number n is

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n

n²

2n

2n²

HCOOH reacts with conc. H₂SO₄to produce

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CO

CO₂

NO

NO₂

An element of the third period (Na to S) is heated in chlorine. The product is purified and then added to water. The resulting solution is found to be neutral. What is the element

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Sodium

Aluminium

Silicon

Phosphorus

The solution of which acid is used for seosoning of food ?

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

Which of the following order is incorrect w.r.t property indicated?

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Formic acid > Acetic acid > Propionic acid (ACID STRENGTH)

Cyclohexanol < Phenol < Benzoic acid ( ACID STRENGTH)

Benzamide < Aniline < Cyclohexylamine ( ACID STRENGTH)

FCH₂COOH > CICH₂COOH > BrCH₂COOH (ACID STRENGTH)

An electric current is passed through silver nitrate solution using silver electrodes.10.79 g of silver was found to be deposited on the cathode if the same amount of electricity is passed through copper sulphate solution using copper electrodes, the weight of copper deposited on the cathode is

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6.4 g

2.3 g

128.8 g

3.2 g

Toluene is also called

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Hydroxyl benzene

Methyl benzene

ethyl benzene

None

The elements with atomic numbers 9, 17, 35, 53, 85 an all

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Noble gases

Halogens

Heavy metals

Light metals

What causes nitrogen to be chemically inert?

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Multiple bond formation in the molecule

Absence of bond distance

Short internuclear distance

High bond energy

Formic Acid is obtained from Red out by:

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Distillation

Crystallization

Filtration

sublimation

Which one of the following is not an alkali metal

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Francium

Caesium

Rubidium

Radium

The optimum conditions of temperature and pressure to get maximum NH₃form N₂and H₂gases is

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2000°C and 10 atmosphere

0°C and 1 atmosphere

400°C and 200-300 atmosphere

200°C and 100 atmosphere

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0.60

1.67

0.66

2.6

K_bvalue of NH₄OH is 1.81 x 10^-5and its conjugate acid has K_a= 5.7 x 10^-10pKb of the base is 4.74, pKa of its conjugate acid is

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-4.74

4.74

10

9.26

In the chemical combination of sodium and hydrogen to form NaH:

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Hydrogen atom gains an electron.

Sodium atom gains an electron.

Both the atoms share the electron.

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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

Which of the following molecules have its central atom sp²hybridized

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CH₄

C₂H₂

C₂H₄

CCl₄

A compound X contains 50% sulphur and 50% oxygen by mass. What is the empirical formula of compound X?

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SO

SO₂

SO₃

SO₄

The radiations with wavelength shorter than violet light are called

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Ultraviolet

Infrared

Microwave

Radio frequency

Dow's process is used for the preparation of

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Ester

Ethers

Alcohols

Phenols

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