Question # 1

The highest oxidation state of manganese is

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+7

-7

+6

+4

Common names of carboxylic acids are given by then:

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Source

Person discovered

Place

Habit

A complete food contains at least

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Three nutrients

Ten nutrients

Six nutrients

Ten nutrients

The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required

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To help plant to under go photosynthesis

To destroy nitrogen oxide from the atmosphere

To help to clean the atmosphere

To help in fixing of bacteria

Enzymes are catalysts which contain other than carbon and hydrogen one other element

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oxygen

sulphur

phosphorus

iodine

Formula of paltimic acid is:

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C₁₁H₂₂COOH

C₁₃H₂₇COOH

C₁₅H₃₁COOH

C₁₇H₃₅COOH

Acetone and chloroform are soluble in each other due to:

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intermolecular hydrogen bonding

dipole-dipole interaction

instantaneous dipoles

all of the above

The molecular mass of a polymer is obtained by multiplying mass of the monomer unit the degree of polymerization. The degree of polymerization of PVC is 1000. What is molecular mass

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65000

63000

62000

60000

Which pair of elements will have the same type of bonds between their atoms in the solid state?

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carbon and calcium

lithium and boron

aluminium and phosphorus

nitrogen and carbon

Ozone is effectively removed by

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TNT

CFCs

PVC

CNG

The temperature of in the incineration of industrial and hazardous waste process has range

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900 - 1000°C

250 - 500°C

950 - 1300°C

500 - 900°C

The fibre which is obtained from naturally occurring proteins is called

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Saran

Azlon

Rayon

Nylon

Hydrocarbans, SO₂, CO, NH₃, nitrogen oxides and compounds of fluorine are called

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Primary pollutant

Secondary pollutant

Tertiary pollutant

None of these

Which of the following is a transition element

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Sr

Sn

Cr

Pb

The human body can synthesize ______ amino acids

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1

10

20

19

The method in which alkanes prepared by alkyle halides in the presence of palladium - charcoal is

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Hydrolysis

Electrolysis

Hydrogenation

Hydrogenolysis

Which is the used as test for the presence of alkenes

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Reaction of cold dilute alkaline KMnO₄

Combustion

Polymerization

Catalytic hydrogenation

Orlon is a polymer of

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Tetrafluoroethylene

Acrylonitrile

Ethanoic acid

Benzene

Nylon, 6,6 is a condensation polymer of

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Adipic acid and glycol

Phthalic acid and glycol

Adipic acid and hexaethylene diamine

Pthalic acid and hexaethylene diamine

According to VSEPR theory, the shape of the water molecule is

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Octahedral

Distorted tetrahedral

Planar triangle

Linear

Number of sigma bonds in P₄O₁₀is

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6

7

17

16

Both E₁and E₂mechanism can be shown by

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1° - RX

2° - RX

3° - RX

None of these

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