Question # 1

Equal masses of CH₄and O₂are mixed in a 10 dm³container at 25°C. The partial pressures of CH₄and O₂are in the ratio of

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1 : 2

2 : 1

1 : 1

2 : 3

The relative rate of diffusion of a gas (molecular weight = 128) as compared to oxygen is

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2 times

1/4

1/8

1/2

The highest temperature above which a gas cannot be liquified no matter how much pressure is applied, is called as

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critical temperature

absolute zero

liquefaction temperature

boiling point

Calorie is equivalent to

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0.4184J

4.184J

418.4J

40.18J

Proxy acetyl nitrat5e (PAN) is an irritant to human beings and it affects:

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nose

stomach

eyes

ears

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

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Acetaldehyde

Formalin

prorionaldehyde

Acetone

The number of moles of H2 in 0.224 L of hydrogen gas at STP (273 K, 1 atm) assuming ideal gas behaviour is

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1

0.1

0.01

0.001

The fibre which is made from vinylidine chloride polymer is called

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rayon fibre

azlon fibre

acetate fibre

all of the above

Vegetables oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

Which factor is helping to reduce the environmental pollution

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Urbanization

Industrialization

Increase of plantation

Rapid growth of population

In aldehydes and ketones carbon of carbonyl group is;

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sp³ hyhridized

sp² hybridized

sp hybridized

un hybridized

A solution having pH = 4 its OH^-ion concentration in mole dm^-3is

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1.0 x 10^-4

1.0 x 10^-10

1.0 x 10^-14

1 x 10⁰

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2, 3-dimethylbutane

2, 3-methylbutane

2-dimethylbutane

Dimethylbutane

Corrosion may be prevented by

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Allcying

Paints

Metallic coatings

All

The color of Cr³⁺ion is

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Violet

Blue

Pink

Green

Polysaccharides are also called

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Crystals

Sugars

Liquids

None sugars

When elements of group I react with the elements of group VIA theory form

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Ionic bond

Covalent bond

Polar bond

None

The range of visible spectrum is

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300 - 600 nm

600 - 900 nm

400 - 750 nm

100 - 300 nm

Cyanoform is ________ acid in nature than the chloroform. The missing word is

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Stronger

Weaker

Amphoteric

Neutral

When a colourless gas is passed through bromine water only decolourisation takes place the gas is

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SO₂

HBR

HCl

H₂S

Which of the following statement about electron affinity of two elements is correct

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Carbon has greater than oxygen

Sulphur has less than oxygen

Iodine has greater than bromine

Bromine has less than chlorine

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2-bromonitrobenzene

2-nitrobromobenzene

1-bromonitrobenzene

1-nitrobromobenzene

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