Question # 1

The reaction C2H5CI + aqueous KOH---------C2H5OH+ KCI is

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Electrophilic addition

Nucleophilic addition

Electrophilic substitution

Nucleophilic substitution

The rigid rocky part of earth crust called lithosphere extends upto a depth of:

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10 km

100 km

1000 km

1500 km

The most complex strueture a single polypetide can assume is

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1° structure

2°structure

3° structure

4° structure

Which order of vapour pressure in the following liquids is correct

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water > ethanol > acetone > ether

ether > acetone > ethanol > water

ether > ethanol > acetone > water

water > ether > acetone > ethanol

Keratomalacia is caused due to the d3eficiency of vitamin:

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A

B

K

D

The trade name of polytereafluoroethylene (PTFE) is

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Teflon

PVC

terelene

polyester

Troposphere extends upto km:

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0-15 km

10-15 km

15-40 km

The amount of heat required to convert one mole of solid into liquid is called

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molar heat of fusion

heat of fusion

heat of vaporization

heat of liquefaction

Monosaccharides belong to the group

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lipids

fats

proteins

carbohydrates

The reaction between fat and NaOH is called

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Esterification

Hydrogenolysis

Fermentation

Sponification

The actual volume of gas molecules is considered negligible at following pressures

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2atm

4atm

6 atm

8 atm

Splitting of spectral lines of the hydrogen atom under the influence or magnetic field is called

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Stark effect

Zeeman effect

Compton effect

Photoelectric effect

Which of the following may affect the rate constant (k) fro a reaction :

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Change in concentration.

Change in pressure.

Change in pH.

Change in temperature.

In molecules kinetic and potential energies are:

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Definite

Moderate

Indefinite

None of above

Which of the following in incorrect?

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FelCl₃is used in the detection of phenols

Fehling solution is used in the detection of glucose

Tollen's reagent is used in detection of unsaturation

NaHSO₃is used in the detection of carbonyl compounds

Two vitamins absorbed from intestine along with fats are

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A, D

A, B

A, C

D, B

The energy of the first electron is helium will be

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-13.6 eV

-54.4 eV

-5.44 eV

zero

Hypo is used in photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Aspirin is

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Acetyl salicylic acid

Phenyl salicylic acid

Salicylic acid

Benzoic acid

When an aqueous solution of potassium salt of monocarboxylic acid is subjected to electrolysis, corresponding alkane is formed. This reation is known as

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Cannizaro reaction

Sabatier-secderens reaction

Alkylation

Kolbe's reaction

Which of the following is a steroid

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Vitamin A

Vitamin B

Vitamin C

Vitamin D

The normal amount of overhead ozone is about

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250 Du

300 DU

350 DU

400 DU

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