Question # 1

The law of distribution of energy is given by

Choose an answer

Clausius

Maxwell

Bernoulli

Boltzmann

Denaturation of proteins is often characterised by

Choose an answer

Loss of biological activity

Aiways being irreversible

Being ereater the lower the temperature

Changes in primary structure

At present the number or cement factories in Pakistan are:

Choose an answer

20

22

25

30

Chemicals used to kill insects are:

Choose an answer

Herbicides

Insecticides

Pesticides

Fungicides

Sugar are polyhydroxy compounds of

Choose an answer

Carboxylic acid

Ketones

Aldehyde

Both B and C

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

Choose an answer

silk

polyester

polyvinyl chloride (PVC)

nylon

Which is not present as heteroatom in heteroeyclie compounds?

Choose an answer

Sulphur

Nitrogen

Oxygen

Chlorine

With increase in temperature, ionic product of H2O

Choose an answer

Decreases

Remains same

Increases

May increase or decrease

In crystal structure of sodium chloride,the arrangement of CI^- ions is

Choose an answer

Fcc

Both fcc and bcc

Bcc

None of these

The energy produced by a carbohydrate is:

Choose an answer

3 kcal/gm

2kcal/gm

6kcal/gm

4kcal/gm

Which of the following is basic amino acid

Choose an answer

Lysine

Histidne

Proline

Both a and b

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Choose an answer

Blow air

Add Na₂CO₃

Use a specially made sorbent having flouring trapped in it

Use a sorbent having Al₂O₃trapped in it

C- X bond is strong in

Choose an answer

CH₃Cl

CH₃Br

CH₃F

CH₃I

Which one of the following statements about glucose and sucrose is incorrect?

Choose an answer

Both are soluble in water

Both are naturally occuring

Both are carbohydrates

Both are disaccharides

In Friedal-Craft's alkylation besides AlCl3 the other reactants are

Choose an answer

C6H6 + NH3

C6H6 + NH4

C6H6 + CH3Cl

C6H6 + CH3COCl

The amount of heat evolved or absorbed by keeping reactants and products at one atmospheric pressure at room temperature is called

Choose an answer

Heat of formation

Standard heat of formation

Standard enthaply change

None

Choose an answer

0.02

0.2

50

25

In OF₂, number of bond pairs and Ione paris of electrons are respectively

Choose an answer

2,6

2,8

2,10

2,9

Ketones are reduced to

Choose an answer

Primary alcohol

Secondary alcohol

Tertiary alcohol

All of these

Which of the following does not exhibit the periodicity in properties of the elements?

Choose an answer

Ionisation energy

N/P ratio

Electronegativity

Atomic radius

Li has the lowest reduction potential while the element with highest reduction potential is

Choose an answer

H

F

O

N

When chloroform is boiled with NaOH, it gives

Choose an answer

Formic acid

Trihydroxymethane

Acetylene

Sodium formate

More Classes

Other Links

Chemistry General Science Test Medium Mode MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer