Question # 1

The symbol of the element whose atoms have the outer most electronic configuration 2s² 2p³ is

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N

Li

P

Na

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

The movement of solvent molecules through a semipermeable membrane is called

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Electrolysis

Electrophoresis

Osmosis

Cataphoresis

Which of the following method is most appropriate for the manufacture of methane?

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By reduction of CH2CL2

Wurtz reaction

Liquification of natural gas

None of these

Setting of cement is an

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Exothermic reaction

Endothermic reaction

Neither exothermic nor endothermic

None

When pressure is applied to the equilibrium system Ice Water Which of the following phenomenon will happen?

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More ice will be formed

Water will evaporate

More water will be formed

Equilibrium will not be formed

Variable valency is generally exhibited by

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Normal elements

Transition elements

Metallic elements

None of these

Ascorbic acid is a chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B₆

ΔH_{Neutralisation} is always

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Positive

Negative

Zero

Positive or negative

When KCIO₃ is heated it decomposes into KCI and O₂ if some MnO₂ is added the reaction goes much faster because

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MnO₂ decomposes to give O₂

MnO₂ provides heat by reacting

Better contact is provided by MnO₂

MnO₂ acts as a catalyst

The alkali metal which is liquid at 15°C is

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K

Cs

Na

None

Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

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11%

33%

44%

22%

The rate at which a substance reacts depends on its

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Atomic weight

Equivalent weight

Molecular weight

Active mass

Ascorbic acid is chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B6

The acid used in lead storage cells is

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Phosphoric acid

Nitric acid

Sulphuric acid

Hydrochloric acid

If the solvent is inflammable for heating purpose we use

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Ice bath

Water bath

Wire gauze

Thermostat

Fertililzer are made by

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Nature only

Artificial methods only

Both artificial and natural methods

None of the above

Cannizzaro reaction is not given by

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Trimethyl acetaldehyde

Acetaldehyde

Benzaldehyde

Formaldehyde.

The maximum number of electrons in a subshell for whichι = 3 is

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14

10

8

4

Hybridization explain the ----------- of orbitals

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Type of Bonding

Shapes

Shape and Type of bonding

None of above

Which of the following compounds has the lowest anion to cation size ratio?

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LiF

NaF

Csl

CsF

Which has maximum protein content?

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Ground nut

Cow milk

Egg

Wheat

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