Question # 1

Bitumen is used in

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Electric generators

Road surfacing

Coal tar

All of above

A diameter of human hair is approximately ________________ m

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75000

75

7.5 x 10^-5

7.5 x 10^-9

The juice is allowed to boil at lower temperatures to protect the sugar from

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Hardening

Solubility in water

Caramelization

Dwatering

The point at which the reaction is observed to be complete is called.

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The equivalence point

The end point

The triplet point

The equilibrium point

Biomass refers to all the organic material derived from

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Photolysis

Photosynthesis

Electrolysis

Oxidation

Which of the following case of acid or base strength is not explained by inductive effect.

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Formic acid> acetic acid

Dimethyl amine > trimethyl amine

Dimethyl amine > methyl amine

Chloroacetic acid > acetic acid

At the some temperature 0.1 M solution of urea is isotonic with.

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0.1 M glucose solution

0.1 M NaCl solution

0.1 M urea solution

0.1 M BaCl2 solution

Natural gas can be transported through

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Cylinders

Pipes

Barriers

All of above

A compound with an congruent melting point decomposes on heating into.

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A liquid of the same composition as the solid

A new solid phase and a solution with a compositional from that of the solid phase

A new solid phase and a solution with the same composition as that of the solid phase

A solution of fixed composition

Which of the following is the statement of third law of thermodynamics.

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Entroy of perfectly crystalline substance is zero at T = 0

Entropy of a perfectly crystaline substance is zero at standard state conditions

Entropy and enthalpy of a substance become equal at T = 0

Free energy of a crystalline substance is zero at T = 0

Urea an enzyme used to estimate urea is a

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Hydrolytic enzyme

Oxidative enzyme

Reductive enzyme

Iso me rising enzyme

Which of the following molecule does not contain the covalent bond between similar atoms.

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N2H4

F2O2

H2F2

H2O2

Retarded reaction are those

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In which the rate of the reaction is independent of pressure

In which products are strongly adsorbed on the surface of the solid catalyst

Which are reversible under all conditions

For which G is positive

Which of the following is most acidic.

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Phenol

p-nitrophenol

o-Nitrophenol

m-Nitrophenol

The pKa of acetic acid is 4.74 which implies that.

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pH of 1N solution is 4.74

At pH 4.74 the dissociation of acetic acid is maximum

At pH 4.74 half of the acetic acid molecules are dissociated in the solution.

At pH 4.74 the dissociation of acetic acid is minimum.

Metal are generally elements

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Electronegative

Electropositive

Neutral

None of the above

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

Which of the following compounds would be most ionic to charcter.

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PbCl4

PbCl2

SnCl4

SnCl2

Which one of the following has the highest boiling point.

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H2O

H2S

H2Se

H2Te

The bromine produced on commercial scale may contain impurities of.

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Water

Chloride

iodine

All above

Electron gas theory fails to explain

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Specific heat of metals

Electrical and thermal conductivity

Paramagnetic behavior of metals

All of the above

The terpenoid responsible fo the smell

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Camphor

Genenial

Citral

Carvone

The electrolytic method super passes all other methods due to.

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Furity

Cheapness

Easy available

All above

The angle between corresponding planes forming the external surfaces of the crystal remains constant for a given substances This is known as.

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Steno's law

Henry's law

Bragg law

Pascal law

Which of the following is not a component of HPLC system.

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Pumps

Columns

Particle collector

Injection system.

The order in O2+ is

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1.0

1.5

2.0

2.5

a -amino acids when heated alone form

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Cyclic lactum

a-b-unsaturated acid

Fatty acids

Diketopiperzines

Ionic bond are also forces called as.

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Polar bond

Electrovalent bond

None polar bond

Both A and B

The wire of flash bulb is made up of.

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Cu

Ag

Mg

Ba

How much amount of NaOH is required to prepare 100 mL of 1 N solution.

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80 g

4 g

40 g

zero

The sugar present in DNA is

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D- Ribose

D-Glucose

2- Doxy D-Ribose

3-Deoxy D-ribose

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