Question # 1

A molecule of polysaccharide on hydrolysis produces _________ molecules of monosacharides:

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many

Few

2-10

100

The value of Kc for H2O at 25C° is

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1x10 (-14)mole dm-3

14 mol dm-3

1.86×10(-16) mol dm-3

1.0x10 (-7)moldm-3

Which of the following equations represents the 2nd ionization energy of Na?

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Na(g) ---> Na²⁺ (g) + 2e^-

Na(s) ---> Na²⁺ (g) + 2e^-

Na⁺(s) ---> Na²⁺ (g) + e^-

Na⁺(g) ---> Na²⁺ (g) + e^-

Coordination number of Zn and ZnS (Zinc blends) is

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4

6

2

None of these

By increasing the concentration of reactants, the rate of reaction

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Decreases

Increases

Remains constant

Not predicted

A molecule of polysacharide on hydrolysis produces __________of molecules of monosacharide,

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2 - 10

3

>10

2

This is known fact that the molar volumes of different gases at S.T.P. are

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much larger than the molar volumes of liquids and solids

little bit less than the molar volumes of solids

about the same as the molar volumes of liquids

little bit greeter than the molar volumes of liquids

The volume of 2.8 g of carbon monoxide at 27°C and 0.821 atm pressure is (R = 0.0821 lit.atm.Mol^-1 K^-1)

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30 L

3 L

0.3 L

1.5 L

All of the following are hydroxy containing amino acids except

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Serine

Threonine

Valine

Tyrosine

Ethene can give all of the following reactions except

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Addition

Free radical substitution

Hydrohalogenation

Hydration

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

Ketones are prepared by the oxidation of:

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

Which statement is correct for the fuel cells

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These cells operate at low temperature

No catalyst used for the formation of water

MnO₂is used as electrolyte

Which one of following is not monocyclic aromatic hydrocarbon

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Benzaldehyde

Benzoic acid

Benzene sulfonic acid

Biphenyl

Saturated solution of a solid is prepared at a constant temperature. 100 cm³of this saturated solution is evaporated in a china dish. The mass of the residue is called

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Azetropic mixture

Solubility

Solubility product

Equilibrium constant

Which of these polymers is an addition polymer?

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Nylon-6,6

Polystyrene

Terylene

Epoxy resin

When alkyl halides are heated with aqueous solution of ammonia at about 100°C, amines are formed. This reaction is known as

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Williamsons synthesis

GHoffmans reaction

Wurtz reaction

Clemensen reaction

Corrosion reaction are

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Spontaneous redox reaction

Non-spontaneous acid-base reactions

Spontaneous acid-base reactions

None of these

The prosthetic group in glycoprotein is

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Carbohydrate

Fat

Vitamin

Nucleic acid

Alkyl halides ae considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

In the presence of high temperature and pressure peat is converted to:

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Lignite

Polymorphism

Polymerization

Catenation

Which has greater number of moles

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0.1 g sodium

6.02 x 10²⁰atoms of magnesium

20 cm³0.1mole per dm³of NaOH

12.2 dm³of nitrogen at standard

[A_rNa = 23, Mg = 24, O = 16]

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