Question # 1

How many isotopes are present in palladium

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Two

Four

Six

nine

Iodine number of an oil indicates its:

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molecular weight

purity

degree of unsaturation

acidic strength

The words smog is a combination of smoke and:

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fog

foke

fork

fizzy

Alkaline phosphatese is associated with ______ disease

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Heart disease

Rickets

Diabtese

None

The heat of reaction depends upon

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Temperature of the reactants

Physical states of the reactants and the products

Both A) and B)

Path of the reaction and the temperature

Which substances do nto react immediately with bromine water:

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ethane

benzene

ethene

phenol

Which one of the following statements about sodium chloride is incorrect?

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it has a high melting point

it conducts electricity at room temperature

it is soluble in water

it is brittle

Sponification number of a fat which requires 178,000 mg of KOH for saponification is (mol wt = 1240)

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120

143

208

210

What is the most common catalyst used in hydrogenation of oils?

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cobalt

nickel

tungsten

copper

A polymer of polyvinyl chloride with DP 1000 has molecular or molar mass:

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630

6300

63000

630000

Term ozone hole is used for depletion of ozone during months of:

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Jan-Feb

March - Sep

Sep- Nov

Dec-Feb

Hydrolytic reaction of fats by causic soda is known as

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Acetylation

Carboxylation

Esterification

Saponification

In H₂O molecule the bond angle is

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90°

109.5°

107°

104.5°

Which of the following acid can be used as a catalyst in Friedal Craft's reactions

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AlCl₃

HNO₃

BeCl₂

NaCl

The comparative rates at which the solutes move in paper chromatography, depend on:

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the size of per sued.

R_f values of solutes

temperature of the experiment

size of the chromatography tank used.

Cellulose does:

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Satisfy human appetite

Stimulates intestinal peristalsis

Gives fibre and bulk to the food

All of these

The sum of the exponents of the conc. terms in the rate equation is called

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Rate of reaction

Order of reaction

Specific rate constant

Average rate

Which is a reagent for Lucas test

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ZnCl₂+ Conc. HCl

Zn

Na

Br

Use of glycol as anti freeze in the automobile is an important application of

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Colligative property

Raoult's law

Fractional crystallization

Prrhenivs law

The gasoline with high octane No. has ______

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More knocking

Less knocking

No knocking

Only knocking

Which statement is incorrect for and ideal solution

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The forces of attractions between solute and solvent molecules are same

There is no evolution or absorption of heat

Volume of the solution is less than sum of volumes of individual components

Vapour pressure of solution is directly proportional to the mole fraction of solvent

pKb value of NH₄OH is 4.74. If the concentration of NH₄OH is 1 molar containing 0.1 molar NH₄Cl, then pH of this buffer will be

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3.74

10.26

4.74

9.26

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