Question # 1

How many electrons have to be removed to ionize 1.0 x 10(-6) moles of Ne atoms to Ne+ ions in a neon advertising tube:

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6.02x10ê23/1.0x10ê-6

1.0x 10ê-6 x 6.02x 10ê23

1.0x10ê-6 x 6.02×10ê23/20.2

1.0x10ê-6 x 6.02x10ê23/9.65x10ê-1

Malt sugar is converted into glucose by an enzyme invertase present in yeast. The process is known as:

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dehydration

condensation

fermentation

oxidation

The incineration may reduce volume of wastes upto:

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1/4th

1/2nd

2/3rd

3/4th

Amorphous solids:

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have sharp melting point

undergo clean cleavage when cut with knife

have prefect arrangement of atoms

can possesses small regions of orderly arrangement

Air at sea level is dense.This is a practical application of

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Boyle's law

Charle's law

Avogadro's law

Dalton's law

Vegetables oils are:

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unsaturated fatty acids

glycerides of unsaturated fatty acids

glycerides of saturated fatty acids

essential oils obtained from plants

Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of

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2 day

6 day

5 day

7 day

The structure of sodium chloride is

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simple cube

body centered cubic

face centered cubic

depends upon conditions

Water soluble and cyrstalline carbohydrrates are:

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monosacharides

obiligoseacharides

polysacharides

a and b

According to Boyles law, at constant temperature the product of pressure and volume of a given mass of gas is

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whole number

a constant

fraction

a multiple

Cooling happens under the Joule Thomson Effect due to sudden:

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Contraction.

Absorption.

Expansion.

All of above.

Clemensen's reduction of ketones is carried out in

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H₂with Pd catalyst

Glycol with KOH

LiAIH₄in water

Zn-Hg with conc. HCl

In alkynes the bonds between carbon atoms are

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All sigma bonds

All pi(π) bonds

One is sigma and two areπ(pi) bonds

One isπ(pi) and two are sigma bonds

Carbon monoxide is harmful to human beings as it

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Is carcinogenic

Is antagonistic to CO₂

Has higher affinity for hemoglobin as compared to oxygen

Is destructive to O₃

Dehydration of allcohol gives:

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Alkane

Alkene

Aldehyde

ketone

The presence of a double bond in a compound in the sign of:

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Saturation

Unsaturation

Subsitution

None

General formula of carbocyclic acids is:

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RCOH

RCOR

RCOOR

R-OH

Gypsum is applied to the soil to provide calcium and

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Oxygen

Nitrogen

Phosphorous

Sulphur

Elimination bimolecular reactions usually obey

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First order kinetics

Second order kinetics

Third order kinetics

Zero order kinetics

The metal present in blood is

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Al

Hg

Cu

Fe

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di(4-bormophenyl) method

Methanol

Propan-1-ol

Propan-2-ol

Which of the following is a constituent of nylon?

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Adipic acid

Styrene

Teflon

None of these

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