Question # 1

A fat or oil is characterized for extent of unsaturation by one of the following number. Which one is

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Acid number

Saoilucfucation number

Rancidity number

Iodine number

1, 3, 5-Pentanetriol has secondary carbon

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3

1

2

Zero

The formation of ester from acetic aciad in presence of acid and ethanol is a

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Nucleophilic substitution reaction

Nucleophilic addition reaction

Electrophilic substituion reaction

Electrophilic addition reaction

Large molecules with high molecular mass formed due to smaller units ae called:

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polymer

macromolecule

micromolecule

a & b

Which one of the following is not air pollutant gas

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CO

CO₂

NO

SO₂

Ozone is present in layer around earth:

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atmosphere

tropospher

stratosphere

thermosphere

Which one of the following does not act as pollutant

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Carbon monoxide

Sulphur dioxide

Hydrocarbons

Carbon dioxide

A complete food contains at least:

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three nutrients

ten nutrients

six nutrients

eight nutrients

The crystal system are of

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7 types

10 types

5 types

8 types

Hydration of ethene is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Which one of the following is a water soluble vitamin?

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niacin

rioflavin

trypsin

ascorobic acid

In Lucas test primary alcohol make as oily layer

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Immediately

In 10 mins

On heating

Not

By applying Hess's law, we can calculate

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ΔH

ΔS

ΔF

K

The two half cells of a galvanic cell are connected by

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Ammeter

Salt bridge

Hydrogen electrode

Copper electrode

Which of the sub-atomic particles is not charged

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Electron

Proton

Neutron

All of them

The chemical formula of magnesite is

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MgCl₂

Mg(HCO₃)₂

MgCO₃

None of these

The number of antibonding electron pairs in O^2-molecular ion on the basis of MOT is

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4

3

2

5

The function of salt bridge is :

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To increase movement onions.

To increase the emf of cell.

To decrease the temperate

To maintain electrical neutrality

Which of the following elements is most electronegative?

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Oxygen

Chlorine

Nitrogen

Fluorine

Vegetables oil are:

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Unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

None of these

Incomplete oxidation of alkanes yields

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CO₂& carbon black

CO₂+ heat

CO and carbon black

CO + heat

Hydrolytic reaction of fats by causic soda is known as

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Acetylation

Carboxylation

Esterification

Saponification

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