Question # 1

one gram of carbohydrate yields energy:

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10kcal

100kcal

4kcal

9kcal

Choose the difference between natural and synthetic fertilizers:

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shapes

usage

crop application

raw material

Select the name of reedy plant from which word paper is derived:

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Sunflower

Water hyacinth

Papyrus

Rose

Benedict solution gives a positive test with

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Glucose

Fructose

Sucrose

Starch

The major binding force of diamond,silicon and quartz is

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Electostatic force

Electical attraction

Ceobalent bond force

Non convalent bond force

The heat of reaction depends upon

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Temperature of the reactants

Physical states of the reactants and the products

Both A) and B)

Path of the reaction and the temperature

α and β Glucose differs in orientation of hydroxyl group around

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C₁

C₂

C₃

C₄

A single chlorine free radical can destroy how many ozone molecules

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100

100000

10000

10

The basic difference between synthetic and natural fertilizer is in their

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raw material

crop application

usage

shapes

Boron, aluminium, gallium, indium and thallium belong to group lll-A of the periodic table show a decrease with increasing relative atomic mass:

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Ionic character of the compounds

The first ionization energy

The basic character of the oxides

The stability of +2 oxidation

Which of the following factors does not affect the SN1 rate is

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Nucleophilicity of the attacking nucleophile

Stability of the carbonium ion

Solvent system

The nature of leaving group

Alkyl halides react with Mg in dry ether to form

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Magnesium halide

Grignard's reagent

Alkene

Alkyne

The addition of HCN to carbonyl compounds is an example of

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Nucleopihlic substituion

Electrophilic addition

Nueleophilic addition

Electrophilic substitution

Among the elements given below, the one with highest electropositivity is

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Cu

Cs

Cr

Ba

A suitable solvent should dissolve maximum amount of solute at its boiling point and minimum amount at :

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Freezing point.

Room temperature.

Boiling point.

Sea level temperature.

Ketones are prepared by the oxidation of

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

Methyl alcohol is not used

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As a solvent

A an anti-freezing agent

As a substitute for petrol

For denaturing of ethyl alcohol

Organic synthetic or man made polymers are plastics, rubber and fibre. Which is not a synthetic polymer

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Silk

Polyester

Polyvinyl chloride

Nylon

Grignard's reagent on treatment with chloramine give

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Acetamide

Primary amice

Secondary amice

Urea

The catalytic activity of Pt is much higher when

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It is mixed with asbestos

It is mixed with Pd

It is mixed with arsenic

In is made colloidal platinum

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

Condensation of aldeydes withα-hydrogen gives:

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Acetal

Ketal

Aldol

Cannizzaro product

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