Question # 1

The value of oxidation number of chlorine in HCIOs is

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+7

+5

-1

+3

Inside every fluorescent lamp there is present a:

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Gas

Plasma

Liquid

Solid

Amount of cellulose produced by plants every year is _____ approximately

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100 billion tons

90billion tons

80 billion tons

70 billion tons

Steam causes more seers burns than boiling water. It is due to

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Latent heat of fusion

Latent heat of vaporization

Latent heat of sublimation

All of above

Factors affecting quality of water:

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D.O

BOD

COD

a,b,c

The nature of the attractive force in acetone and chloroform are

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dipole-induced dipole forces

dipole-dipole forces

ion-dipole forces

instantaneous forces

Three elements needed for the healthy growth of plants are

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N P K

N K C

N S P

N Ca P

Property due to which water acts as a universal solvent is

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Polarity

It's ability to make hydrogen bond

Both A and B

Strong dipole dipole interaction

The potential difference set up at 25 C and 1 atm when clectrode is dipped m Tis one molar ionic sohution is called

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Single electrode potential

electrode potential

Standard electrode potential

Standard hydrogen electrode

Photo chemical smog contains _________ as main reactants:

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nitrons oxide and unburnt hydrocarbons

niliric oxide and unburnt hydrocarbons

NO and burnt hydrocarbons

N₂O and burnt hydrocarbons

Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that causes contamination in fresh water

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Rain

Live stock waste

Oil leaks and spills

Disposal of industrial effluents

Polysaccharides are also called

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Crystals

Sugars

Liquids

None sugars

The carbon atom of a carbonyl group is

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Sp hybridized

Sp²hybridized

Sp³hybridized

None of these

Ammonium carbonate when heated to 200°C gives a mixture of NH₃and CO₂vapour with a density of 13.0. What is the degree of dissociation of ammonia carbonate?

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3/2

1/2

2

1

Which one of the following reaction rate is effected by the light

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In endothermic reactions, the heat content of the

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Products is more than that of reactants

Reactants is more than that of products

Both a and b

None of the above

The process in which one s and two p orbitals mix up with each other is called

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Sp-hybridization

Sp²-hybridization

Sp³-hybridization

Dsp²-hybridization

X-ray work has shown that the diameters of atom are of the order of

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8 x 10^-10m

2 x 10^-10m

8 x 10^-8m

2 x 10^-8m

The compound prepared by a substitution reaction of benzene is

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Acetophenone

Glyoxal

Cyclohexame

Hexabromo cyclohexane

The filtration process is used to separate solid from

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Liquid

Gas

Solid

All of above

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Hydrocarbons are divided into aliphatic, alicyclic and aromatic which structure among the following show an alicyclic hydrocarbon

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