Question # 1

During incineration temperature range of non-rotating chamber is

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900-1000C°

650-1100C°

950-1300C°

700-900C°

Which of these polymers is a synthetic polymer

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Animal fat

Strach

Cellulose

Polyester

Eleven elements made part of earth mass:

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97.5%

98.5%

99.5%

100%

The number of moles of H2 in 0.224 L of hydrogen gas at STP (273 K, 1 atm) assuming ideal gas behaviour is

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1

0.1

0.01

0.001

Enzymes catalyse all biological reactions occuring in the cell. What is true about an enzyme?

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Enzyme is a small molecule

Enzyme is acidic in nature

Enzyme is a protein

Enzyme is a lipid

4.4 g of CO₂ contains how many litres of CO₂ at STP?

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2.4 litre

2.24 litre

44 litre

22.4 litre

An excellent source of energy without causing pollution is

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Fossil fuel

Sun

Petroleum

Nuclear reactor

The electrochemical series is based on

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pH scale

Redox scale

Hdrogen scale

Arrhenius scale

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

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2 days

5 days

6 days

7 days

Which of the following waster material is not recycled for use again

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paper

plastic

hides of animals

glass

The B.P. of compound is mostly raised by

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dipole-induced dipole interactions

london dispersion forces

intramolecular H-bonding

intermolecular H-bonding

Grignard reagent is not prepared in aqueous medium but prepared in ether medium because

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The reagent is highly reactive in ether

The reagent does not react with water

The reagent becomes inactive in water

The reagent reacts with water

The raw material to form nylon is

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Adipic acid

Butadiene

Isoprene

Ethylene

Which of the following acts as ligand

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NH₃

NH₂-- CH₂-- CH₂-- NH₂

C₂O^2-₄

All these

The number of amino acids found in proteins that a human body can synthesize is

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20

10

5

14

When fused PbBr₂is electrolyed then

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Bromine appears at cathode

Lead deposited at the cathode

Lead appears at the anode

None of these happens

Solvent extraction method is a particularly useful technique of separation when the product to be separated is:

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non-volatile or thermally unstable.

volatile or thermally stable.

non-volatile or thermally stable.

volatile or thermally unstable.

An oil or fat with no double bond have iodine number:

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Zero

100%

50%

Minimum

Which of the following react with NaOH to produce an acid and an alcohol?

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NCHO

CH₃COOH

CH₃CH₂COOH

C₆H₅COOH

Ionic radius, in a period from left to right

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Increases

Decreases

Decreases then increases

Increases and decreases

During redox reaction an oxidizing agent

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Gains electrons

Is oxidized

Loses electrons

Hydrolysed

Benzene has a -------- structure

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Pentagonal

Hexagonal

Heptagonal

Tetragonal

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