Question # 1

The boiling point of glycerin at 1 atmospheric pressure is:

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290°C

390°C

190C°

210°C

The change in enthalpy of a system when one mole of the substance is completely burnt in excess of air or oxygen is called

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Heat of reaction

Heat of formation

Heat of atomization

Heat of combustion

Number of moles present in 0.6 gram of silica is (Atomic mass Si = 28, O=16)

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0.01 mole

0.064 mole

0.044 mole

0.054 mole

Ethyl and methyl groups are equidistant in a chain, the preference is given to?

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Ethyl

methyl

both ethyl and methyl

methyl mostly

Albumin, globin and casein are

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Milk proteins

Plasma proteins

Egg proteins

Meat proteins

When a nitrogeneous base combine with a sugar it is called

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Ribose

Nucleotides

Nucleoside

None

Ozone is effectively removed by

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TNT

CFCs

PVC

CNG

Which of the following is not glyceride

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Soap

Phospholipids

Oil

Fat

The phenomenon in which sudden expansion of a gas causes cooling is called

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evaporation

cooling

Joule Thomson effect

sublimation

The enthalpy of formation of a compound is

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Positive

Either positive or negative

Negative

None

Polymer formed by the combining of three different monomers is called:

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Homopolymer

Copolymer

Ter polymer

Thermoplastic polymers

When SO₂is passed through acidified K₂Cr₂O₇solution

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The solution turns blue

The solution is decolourised

SO₂is reduced

Green Cr₂(SO₄)₃is formed

The unit of rate constant K ismole^-1 dm³for a chemical reaction, the order of reaction is :

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Order of reaction can determined by an experiment

Order of reaction can determined from a balance equation only.

Order of reaction can determined increases by increasing temperate.

Order of reaction must be in whole number and not in fraction.

Hydrolysis of alkyl nitriles is done to get carboxylic acids in the presence of

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Mineral acids

Mineral alkalies

Organics acids

Minerals acids & alkalies

The presence of a double bond in a compound in the sign of:

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Saturation

Unsaturation

Subsitution

None

The largest number of molecules are present in

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3.6 g of H₂O

4.8 g of C₂H₅OH

2.8 g of CO

5.4 g of N₂O₅

For which one of the following pairs of compounds can the members be distinguished by means of Tollen's test

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HCHO and CH₃CHO

CH₃CHO and CH₃COCH

CH₃COCH₃and C₆H₅COCH₃

CH₃COOH and CH₃COOCH₃

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

The temperature at which the vapour pressure of a liquid becomes equal to external pressure is

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Melting point

Sublimation point

Inversion point

Boiling point

Which is not a bidentate ligand

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What is the most common catalyst used in hydrogenation of oils

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Cobalt

Nickel

Tungsten

Copper

Ammonium nitrate fertilizer is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

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