Question # 1

The film forming components of paints are

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resins

thinners

pigments

driers

Which of the following is a limitation of balanced chemical equation

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Conditions and rate of reactions

Physical state and mechanism

Reactants and products and their coefficients

Both (a) and (b)

During an exothermic or endothermic reaction which one of the following formula is used to calculate the amount of heat evolved or absorbed

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ΔΗ = ΔΕ+PV

∆E= q+w

Δp =ΔΗ

q = m x s x ∆T

Which of these polymers is an addition polymer?

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nylon 6,6

polystyrene

terylene

epoxy resin

Simplest Structure of a protein that has only covalent bonding between amino acids is

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2° structure

3°structure

1° structure

4° structure

Thrombin is locally used to stop

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Heart disease

Bleeding

Blood

None of these

The number of NaCI molecules in unit cell of its crystal is

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2

4

6

8

Tasteless sugars are:

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monosaccharides

trisaccharides

oligo saccharides

poly saccharides

Octyl acetate has the flavor of

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Orange

Pineapple

Banana

Apple

The mass of 8.5 dm³of oxygen gas at 0.0821 atm and -1°C is

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100 g

10 g

1 g

0.1 g

Which of the following are thermoplastic materials?

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PVC

polystyrenes

polyethylene

all these

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Electrophilic substitution

Free radical reduction

Isomerisation

Nucleophilic substitution

Which of the following does not exhibit the periodicity in properties of the elements?

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Ionisation energy

N/P ratio

Electronegativity

Atomic radius

The relative abundance of Pb isotopes is 1.5% Pb²⁰⁴, 23.6% Pb²⁰⁶, 22.6% Pb²⁰⁷, 52.3% Pb²⁰⁸The relative atomic mass of Pb is

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207.94

208.24

206.94

207.24

Synthetic polymer prepared from caprolactum is known is

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Nylon 610

Teflon

Terylene

Nylon-6

A catalyst is a substance which increase the rate of a chemical reaction, but remains unchanged at the end of reaction, nut remains unchanged at the end of reaction, because

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It increases the temperature

It increase the surface area

It increases the rate constant

It decrease the energy energy of activation

Acetone is oxidized with

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Tollen's reagent

Fehling solution

Acidic dichromate solution

Benedicts solution

Which statement in not correct about alcohol?

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Ethyl alcohol is heavier than water

Ethyl alcohol ecaporates more quickly

Alcohol with less number of carbon atoms is more soluble in water than alcohol with more number of carbons atoms

Alcohol produces H₂by reaction with sodium metal

Which among the following elements have lowest value of IE₁?

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Pb

Sn

Si

C

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

Identify the heterocyclic compound

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Toluene

Pyridine

Butanoic acid

Propenol

Which is not a calcarious material?

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Lime

Clay

Marble

Marine shell

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