Question # 1

Each fat or oil in made up of

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A distinctive mixture of several different triglycorides

A distinctive mixture of several aldehydes

Mixture of above both

None of above

What is the approximate chromium range of a ferritic stainless steel.

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12% to 18%

16% to 20%

20% to 24%

12% to 16%

The number of formula weight of the solute dissolved per dm3 of the solution is called.

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Mole fraction

Normality

Formality

Molaiity

Colloids can be purified by

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Peptization

Coagulation

The Breeding are method

Dialysis

The following statements are true except one which one.

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Carburizing does not harden a steel

Flame and induction hardening require the use of hard enable steels.

Quench –hardened steel does not require tempering to present brittleness

None of these

Which among the following hydride is ionic in nature.

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Ammonia

Protium oxide

Calcium hydride

Sulphane

Transition metal possess

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Definite color

Catalytic power

Both A and B

None of above

The decomposition of dimethyl ether at 504 oC is first order with a half -life of 1570 second. What fraction of an initial amount of dimethyl ether remain after 47-10 seconds.

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1/3

1/6

1/8

1/16

Elements of group 14

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Exhibit oxidation state of -4

Exhibit oxidation state of +4

From M3+ and M4+ ions

Form M4- and M4+ iona

CO belong to which group.

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C_2v

D_2h

C_av

D_ah

Which of tetra chloride is resistant to hydrolysis.

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CCl4

SiCl4

GeCl4

SnCl4

On the basic of CFT the bonding between the metal and ligand is totally

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Ionic

Covalent

Coordinate

Metallic

The most important problem regarding nano chemistry

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Elucidation of relationship between also and chemical reactivity of particle

Determination of size of particle

Determination of reactivity of particle

Determination of physical properties of nano particles.

The valence shell electronic configuration of group III A is.

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ns1 p2

ns2 p1

ns3p2

ns2p2

The isotonic nucleotide X and Y have mass numbers 35 and 37 respectively if the atomic number of X is 17 the atomic number of Y will be.

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15

17

19

18

If reaction A has an activation energy of 250 kj and reaction activation energy of 100 kj, which of the following statements must be correct.

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If reaction A is exothermic and reaction B is endothermic then reaction A is favored kinetically

At the same temperature the rate of reaction B is greater than the rate of reaction A

The energy of reaction A must be greater than the energy of reaction B.

The energy of reaction B must be greater than the energy of reaction A

Presence of nitrogen in organic compound to tested as.

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Nitrogen gas

NH3

NO

Amide

All naturally occurring processes spontaneously in a direction leads to.

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Decrease of entropy

Increase of entropy

Decrease in free energy

Increase in free energy

When propyne is treated with equeous H2SO4 in the presence of HgSO4 the functional isomer of the major product obtained in.

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Propanal

Acetone

Propane 2 -nl

Propanol

The addition of HCl in the presence of poroxule does not follow anti Markovnikov's rule because.

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HCl bond is too strong to be broken homolytically

Cl atom is not reative enough to add on to a double bond

Cl combines with H to give back HCl

HCl is a reducing agent.

Consider to violet colored compund.[Cr(OH)2)6 Cl3 and the yellow compound. [Cr(NH3)6]C;2 which of the following statements is false.

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Both chromium metal ions are paramagnetic with 3 unpaired electrons.

[Cr(NH3)6)3+ is calculated directly form the energy of yellow light

For [Cr(OH)2)6]3+ is less than for [Cr(NH3)6]3+

The two complexes absorb their complementary colors.

Which of the following substance is released into environment in the nuclear power plants.

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Iodine -131

Argon - 41

Sr-90

Cs- 137

All above

Borax exist in the form

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Ordinary borax

Octahdral borax

Borax glass

All above

The important condition for the formation of chemical bond is that.

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Their electron clouds should not diffuse

Both atoms should have high electron affinites.

Both atoms should have same electronegativities

The process should be accompanied by the lowering in potential energy.

_______ is heat treatment cycle that prevents glass from harmful stress.

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Forming

Annealing

Batching

None of these

Which of the following process is involved in the purification of crude metals.

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Liquation process

Oxidation process

Distillation process

Electro refining

In a system of designating wrought aluminum alloys. what does the second digit represents.

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The purity of aluminum

The identity of the alloy

The modification of the alloy group or impurity limits

None of above

Colour in transition metal compounds in attributed to

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Small sized metal ions

Absorption of light in UV region

Complete ns sub shell

incomplete (n-1) sub shell

The concentration of OH- ions in a certain household ammonia solution is 0.0025. This ammonia solution is.

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Basic

Acidic

Neutral

None of above

The maximum degree of freedom for a pure substance under equilibrium constitutions is

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1

2

3

zero

Reaction in which molecules absorbing light do not themselves react but induce other moleculaes to react are called.

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Chain reactions

Photosenaitized reactions

Reversible reactions

Free radical reactions

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