Question # 1

Which of the following configurations corresponds to alkaline earth metals?

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[Ar] 3d10, 4s2

[Ne] 3d2, 3p2

[Ar] 4s2

[Ar], 3d10, 4s1

The arrangement ABC, ABC .... is referred as

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cubic close packing

octahedral close packing

hexagonal close packing

tetrahedral close packing

C-H bond length in the benzene is

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0.99A°

1.09A°

1.12A°

1.34A°

The standard electrode potential of hydrogen is arbitrarily taken at 298k is

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1.00volt

0.10 volt

0.00 volt

10.0 volt

Ozone is produced in regions:

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tropical

Polor

antaric

equator

Which one of the following elements is the strongest reducing agent?

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Chlorine

Sodium

Magnesium

Aluminium

Van der Waals equation explains the behaviour of

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Real gases

Mixture of gases

Ideal gas

Diatomic gases

Thrombin is locally used to stop

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Heart disease

Bleeding

Blood

None of these

In the body, carbohydrates are broken down into

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Glucose

Fatty acids

Amino acids

Nucleic acid

The kinetic energy of three moles of gas is:

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3/2 RT

3 RT

1/2 RT

2 RT

When calcium formate and calcium acetate are dry heated they form

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НCOOH

C2H5OH

CH3CHO

HCHO

Teflon, styron and neoprene are all

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Copolymers

Condensation polymers

Homopolymers

Monomers

In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled then the equilibrium constant will

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Also be doubled

Be halved

Becomes one fourth

Remains the same

Fungicides are the pesticides which

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Control the growth of fungus

Kill insects

Kill plants

Kill herbs

Which woody raw material is used for manufacture of paper pulp?

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Cotton

Bagasse

Popular

Rice straw

The colour of transition metal complexes is due to:

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d-d transitions of electorns

Paramagnetic nature of transition

Ionization

Loss of s-electrons

1 erg of energy corresponds to

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6.02 x 10²³J/mol

6.02 x 10¹⁶J/mol

1 erg/mol

10^-7J/mol

Carboxylic acid, ester, amide and amino groups are shown. Which is the correct description of these functional groups

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If the value of principal quantum number is 3. the total possible values for magnetic quantum number will be

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1

4

9

12

Enthalpy of neutralization of all the strong acids and strong bases has the same value because

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Neutralization leads to the formation of salt and water

Strong acids and bases are ionic substances

Acid always give rise to H⁺ions and bases always furnish OH^-ions

The net chemical change involve the combination of H⁺and OH^-ions to form water

Solution which distill without change in composition or temperature are called

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Amorphous

Azeotropic mixture

Ideal

Super saturated

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

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