Question # 1

Force per unit area is called:

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volume

pressure

weight

density

In ionic bond complete ________________ of electrons occurs.

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Paring

Sharing

Transfer

None

Which is kept constant in the Charle's law:

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Pressure

Temperature

Volume

Mass

The other name of modern periodic table is ________________ of periodic table.

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Long form

Simplified

Simplest

Nil

The reverse of evaporation is:

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Boiling

Diffusion

Condensation

Freezing

________________ orbital is more complex in shape.

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s

p

f

d

One mole of sodium = ______ .

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24 g

25 g

26 g

23 g

Atoms form chemical bonds to attain the electronic configuration of

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Halogens

Noble gases

Alkali metals

Alkaline earthmetals

Sort out a compound from the following

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Air

Salt

Ice-cream

Iron

The bound between ionic compound is ............ .

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Covalent

Co-ordinate

Ionic

Nil

The study of hydrocarbons and their derived compounds is called

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Physical chemistry

Inorganic chemistry

Organic chemistry

Biochemistry

At equilibrium state, when reaction cases to proceed, it is called:

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equilibrium constant

dynamic equilibrium

static equilibrium

simple equilibrium

Which one of the following is not air pollutant.

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CO₂

CO

NO₂

O₂

Which acid is present in our stomach.

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Nitric acid

Hydrochloric acid

Sulphuric acid

All of these

Which of the following is a poisonous gas.

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Oxygen

Ozone

Nitrogen

Carbon dioxide

How many percentage of sunlight is absorbed by atmosphere gases.

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12%

18%

24%

30%

The strone heating of coal in retorts in the absence of air is called.

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Fractional distillation

sublimation

Roasting

Destructive distillation

The lives of aquatic plants and animals are indirectly related to concentration of dissolved gas in water.

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Nitrogen

Hydrogen

Oxygen

Carbon

Which one of the following is not a greenhouse Effect?

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Increasing atmosphere temperature.

Increasing food chains

increasing flood risks

Increasing sea-level

Example of pest is

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Weeds

Herbs

Insect

All of them

General formula of Alkyl radical is..

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C₆H_2n-2

C_nH_2n+2

C₁₁H_2n-1

C_nH_2n-2

Which one of the following does not contain proteins.

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In pulses

In Potatoes

In fruits

In eggs

The unit of rate constant is same as that of rate of reaction in

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first order reaction

Second order reaction

Third order reaction

Zero order reaction

After 3 half lives of a chemical reaction, the % fraction of the amount left is

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6.25

75

12.5

50

Rate of diffusion of CO and N₂are same at room temperature due to the reason, that

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Both are diatomic molecules

Both have same multiple bond in them

Both have lone pairs in them

Both have same molar masses

The heat contents of the system of known as.

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Entropy

Enthalpy

Work

Free energy

Solvent extraction method is particularly useful technique for separation when the product to be separated is

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Non-volatile or thermally unstable

Volatile or thermally unstable

Non-volatile or thermally stable

Volatile or unstable

The charge on electron was determined by millikan in his oil drop experiment and its value is

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6.023 x 10^-23C

1.602 x 10^-23C

1.602 x 10^-19C

6.625 x 10^-34C

Diamond is a bad conductor of electricity because

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It has a tight structure

It has a high density

There are no free electrons present in the crystal of diamond to conduct electronics

None of these

The pH of 10^-3mol dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

The born Haber cycle is the best application of law.

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Boyle's

Dalton's

Hess's

Graham's

During combustion analysis, CO2 produced is absorbed in

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Mg (CLO4)2

50% KOH

CaCl2

P2O5

Whenever a reaction is endothermic, then it means that

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Heat is transferred from surrounding to the system

Heat is transferred system to the surrounding

Heat content of the product is greater than that of reactants

Heat content of the reactants is greater than the products

Which substance reacts with sodium nitroprusside.

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Ethanol

Acetaldehyde

Dimethyl ketone

Methanol

Micronutrients are required in quantity ranging from

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4g-40g

6g-200g

6kg-200kg

4kg-40kg

Woody raw material for paper pulp is obtained from

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Cotton

Bagasse

Poplar

Rice straw

Sodium is collected over molten sodium chloride in Down's cell, because.

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It does not react with NaCl

It is lighter in weight and floats on molten NaCl

Its reactivity is greater than NaCl

None of these

Formalin is

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10% solution of formaldehyde in water

20% solution of formaldehyde in water

40% solution of formaldehyde in water

60% solution of formaldehyde in water

Which of the following compounds is used to make spray, which has fungicidal action.

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BaSO4

Na2CO3

CaO

CaSO4.2H2O

Refrigeration capacity of liquid neon is greater than liquid helium by

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80 times

50 times

40 times

10 times

What type of reaction occurs between ethene and hydrogen.

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Addition

Substitution

Oxidation

Dehydration

Which halogen occurs naturally in a positive oxidation state

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Fluorine

Chlorine

Bromine

Iodine

The conversion of benzene to chlorobenzene is a

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Addition reaction

Elimination reaction

Substitution reaction

Dehydration process

Which one of the following elements shows variable valency, can act as a catalyst and form coloured compounds.

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Carbon

Chlorine

Sulpur

Iron