Question # 1

In big/metropolitan cities, atmosphere is mostly polluted due to:

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radioactive fall out

household waste

pesticide residue

automobile exhausts

Pressure remain constant at which temperature the volume of gas becomes twice of what it is at 0°C

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546 °C

546K

200°C

273K

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

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Atmosphere

Lithosphere

Hydrosphere

Biosphere

The rate of diffusion of a gas of molar mass 72 as compared to H₂will be:

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Same

6 times

1.4 times

1/6 times

An example of ion-dipole force is the solution of:

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bromine inbenzene

ethanol is water

NaCl in water

glucose in water

In aldehydes and ketones carbon of carbonyl group is;

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sp³ hyhridized

sp² hybridized

sp hybridized

un hybridized

Soap is formed when triglyceride reacts with

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Caustic soda

Soda lime

Lime

Caustic potash

Hardness of diamond is attributed to the

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strength of the ionic bonds in the structure

three-dimensional network of covalent bonds

absence of valence electrons in carbon atoms

What is the formula of silica?

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Si2O3

SiO2

Si3O4

SiO-

Which one of the following gases has lowest density at room temperature:

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NH₃

Ne

N₂

CO

Choose the chief air pollutant among the following which depletes ozone layer:

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carbon monoxide

carbon dioxide

chloroflurocarbons and nitrogen oxides

sulphur dioxide

When the rate of formation of reactants is equal to the rate of formation of products, this is known as

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Chemical reaction

Chemical equilibrium

Chemical kinetics

None

Which of the following fertilizers is useful for paddy rice

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Ammonium nitrate

Ammonium sulphate

Urea

Ammonium chloride

Isopropyl alcohol on oxidation gives

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Acetone

Ether

Ethylene

Acetaldehyde

The electron releasing effect of methyl group is significant and it makes ring a good

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Electrophilic

Nucleophilic

Nucleophobic

Hydrophobic

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Homogeneous

Heterogeneous

Isogeneous

None

Nylon 6, 6 is prepared by the reaction of nexamethylene with

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Formic acid

Acetic acid

Adipic acid

None of these

Enzymes are

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Proteins

Minerals

Oils

Fatty acids

Effective magnetic moment of Sc³⁺ion is

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1.73

0

5.92

2.83

Which one of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lypase

Kinetic energy of the molecules is due to

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Transnational motion

Rotational motion

Vibrational motion

All of these

It rate law of an equation is written asdx/dt=K[A][B] ?

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Reaction is independent of the concentration of A and B.

Product is decreasing with passage of time.

Reactant in increasing with passage of time.

Reactant is increasing with passage of time.

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