Question # 1

The variable valency is generally observed in case of.

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Transition elements

Inert gases

Normal elements

Non- metallic elements

For a chemical reaction A ___________ produce, the rat of the reaction doubles when the concentration of A is increased by 4 times the order of the reaction is.

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0

1

1/2

4

The size of nanoparticles is between __________ nm

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100 to 1000

1 to 100

0.1 to 10

0.01 to 1

An example of acyclic polytropenoid is

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Myrcone

Buna -S

Synthetic rubber

Natural rubber

The phase rule was deduced by

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Gibbs

Thomson

Troution

Henry

What is the ASTM tension testing designation for standard method for steel products.

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A 370

E 345

E8

E 9

Which of the following pollutants does not a leave a residue.

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Air pollutant

Chemical pollutant

Soil pollutant

Noise pollutant

The relative lowering of vapour pressure of a solution on the addition of non -volatile solute.

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Is equal to the mole fraction of solute

Is equal to the sum of the mole fraction of the solute and solvent

Depends upon the nature of the solute

Depends upon the mole fraction of the solvent

Which of the following statements false about transition metals.

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They form complexes

They show variable valency

All transiting metal compounds are paramagnetic

They form coloured ions

In reverse phase chromatography which of the analyte will be retained more on the stationary phase.

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Semi polar

Non polar

Polar

None of the above

CNG is stored under

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Power genertion

Electric Generators

Solvent

All of above

With which one of the following configurations, the lowest value of first IE is associated.

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Is2, 2s2, 2p6, 3s1

1s2, 2s2, 2p5

1s2, 2s2, 2p6

1s2, 2s2, 2p6, 3s2, 3p2

Which of the following statements is correct.

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A sigma bond is weaker than a pi pond

There are four coordinate bonds in the Lewis structure of NH4+ ion.

The 1 covalent bond is directional in nature

A single bond between the two atoms cannot be re bond.

The rate constant of a reaction depends on

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Concentration of reactants

Concentration of products

Temperature

Time

Zero group of the periodic table consists of.

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Four elements

Five elements

Six elements

Eight elements

Select a basic amino acid.

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Glycine

Cystine

Alanine

Lysine

Which librates H2 with NaOH

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B

AI

Zn

All

Which of the following is the active ingredient in ordinary household bleach.

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HCl

Cl2

NaCl

NaCIO

The compounds whose formation require a host compound and a guest compound are called.

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Exclusion compounds

Inclusion compounds

Crystal compounds

None of the above

The vitamin which is related to monossaccharides is.

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Vitamin A

Vitamin C

Vitamin D

Vitamin E

Which element out of the following can ehibit a maximum con valency of seven.

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Chlorine

Sulphur

Fluorine

both Cl and F

The thermal conductivity of an SWNT along length is _____ watt/(m.k)

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35

330

386

3500

The bond order gives the following valuable information.

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Stability of the molecules of ions

Bond dissociation energy and bond length

Magnetic properties

All of the above

Which of the following statement is not related to applications and limitations of first law of thermodynamics.

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This law explains why chemical reactions proceed to completion

It is silent about the source of heat

It is silent about the direction of heat

It does not tell us about the reversible process.

The secondary valency of Conc. CoCl3. 6NH3.

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2

4

6

8

Which of the following is a non degradable pollutant.

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Long chain phenoiics

DDT

Mercuric salts

All above

At constant temperature , the decrease in Halmholts free energy is equal to.

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Decrease in entropy

Increase in entropy

Reversible work done by the system

All types of work done

Shows a regular increase on moving down the group form carbon to lead

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Atomic volume

Atomic radius

Density

All above

Which of the following solutions of sulphuric acid will exactly neutralize 25 mL. of 0.2 M NaOH

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12.5 mL of 0.1 M solution

24 mL OF 0.1 m Solution

50 mL of 0.1 M solution

None of the above

The element Uuu has atomic numebr

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102

111

101

110

The one which is not a purine base

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Cytosine

Guanine

None of these

Adenine

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