Question # 1

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution

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live stock waste

agricultural pesticides

oil beaks and spills

all of the above

Ethane when completely halogenated in excess of chiorine can form

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Hexachloroethane

Dichloroethane

Pentachloroethane

1.1.2.2-terachloroethane

Compressibility factor for an ideal gas is

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1.5

1.0

2.0

0.5

An ester is prepared by:

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two alcohols

carboxylic acid and alcohol

ketone and alcohol

aldehyde and alcohol

Site of land for landfill is selected based upon.

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topography

location of ground

water table

All of these

Which of the follwing dnes not give brick red precispitate wits Fehling's solution

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Acetaldehyde

Formalin

prorionaldehyde

Acetone

In the body fats are hydrolysed into:

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fatty acid and water

fatty acid

glycerol and water

acid and glycerol

Pressure remaining constant at which temperature the volume of a gas will become twince of what it is at 0∘C.

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546∘C

200∘C

546K

273K

The strength of dipole-dipole forces depends upon

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Electro negativity difference

Distance between atoms

Electropositivity difference

Both A & B

What is not true about DNA?

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it preserves genetic information

Synthesizes protein

it has a linear structure

To replicates

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

Which is not nitrogeneous fertilizers?

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(NH₄)₂HPO₄

NH₄NO₃

Urea

Calcium phosphate

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When ethyl iodide and n-propyl iodide are allowed to react with sodium metal in ether, the number of alkanes that could be produced is

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Only one

Two alkanes

Three alkanes

Four alkanes

Which is an essential constituent of chlorophyll

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Be

Fe

Mg

Ca

Phenol is also known as

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Acetic acid

Carbolic acid

Tararic acid

Trichloroacetic acid

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

Sulphur dioxide affects

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Cell wall

Plasmodesmata

All membrane systems

Nucleus

The pH range of the acid rain is

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8 - 7

7 - 6.5

6.5 - 6

Less than 5

Which of the following is not related to transition metals

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They have a high tensile strength

They are ductile

They are malleable

They have low melting points

For principle quantum number n=4, the total number of orbitals having l = 3 is

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3

7

5

9

Heat,. work and internal energy of the system and surroundings are related into an equation which is called

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First law of thermodynamics

Hess's law

Henry's law

Born-haber cycle

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