Question # 1

Industrial materials and thermal power stations are coated by

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PVC

Polyester

Epoxy resin

PVA

Nylon, 6,6 is a condensation polymer of

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adipic acid and glycol

phthalic acid and glycol

adipic acid and hexaethylene diamine

phthalic acid and hexaethylene diamine

If internal energy of the system is increased

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Change in state of the system may occur

Temperature of the system may rise

Chemical reaction may take place

All of these

Dehydrogenase is an erample of

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Transferase

Hydrolase

Lyase

Oxido-reductase

Which of these polymers is a synthetic polymer

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Starch

Animal fat

Polyester in an addition polymer

Cellulose

What is true about an alcohol and phenol

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Both are more acidic than water

Both react with NaOH

Both produce CO2 with Na2CO3

Both, produce H2 with Na

What will be the pH of 1.0 mol dm -3 of H2X, which is only 50% dissociated

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1

0

2

Less than 0

Beryllium differs from other elements of group Il-A due to

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high charge density

comparatively high nuclear charge

small radius

all above

Molecular mass of PVC is (DP = 1200)

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63000

75000

75600

80,000

The slope of the graph is steepest at the beginning of reaction showing

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Rapid decrease in concentration of reactants

Rapid increase in concentration of reactants

Fast rate of reaction

All of the above

To which of the following mixtures Dalton's law of partial pressures is not applicable?

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CO and CO₂

CO₂ and N₂

CH₄ and C₂H₆

HCI and NH₃

Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?

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Carbon monoxide

Diamond

Ethane

Methane

Which one of the following gases is used for artificial ripening of fruits

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Ethene

Ethane

Methane

Propane

Orbitals having same energy are called

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Hybrid orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

The rate of which the reaction proceeds is directly proportional to the product of the active masses of the reactants is according to

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Law of mass action

Le Chateliers principle

Equilibrium law

Law of constant proportion

Carboxylic acid, ester, amide and amino groups are shown. Which is the correct description of these functional groups

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Which is the longest period of the periodic table

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5th

7th

6th

2nd

Sulphonation of benzoic acid produces mainly

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o-Sulphobenzoic acid

m-sulohobenzoic acid

p-Sulphobenzoic acid

o-and p-Sulphobenzoic acid

Purification of an impure copper is made by electrolytic cell, in which impure copper is anode and pure copper is cathode, and the electrolyte used is

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H₂SO₄

CuSO₄

ZnSO₄

Na₂SO₄

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Complete conversion of A to B has taken place

Conversion of A to B is only 50% complete

Only 10% conversion of A to B has taken place

The rate of transformation of A to B is just equal to rate of transformation of B to A in the system

Chief source of water and soil pollution is

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Mining

Thermal power plant

Agro-industry

All the above

The lA elements are called

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Alkaline earth metal

Alkaline metals

The halogens

The inert gases

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