Question # 1

The amount of heat required to convert one mole of solid directly into its vapour state at STP is called as

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Molar heat of vaporization

Standard heat of vaporization

Heat of reaction

Heat of neutralization

DNA has deoxyribose, a base and the third component is

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Phosphoric acid

Ribose

Adenine

Thymine

The substances that are added to the soil to provide nutrient or assential elements required for plant growth, are called

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Additives

Fertilizer

Manures

Posticides

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Aqueous bromine

Dilute HNO₃

Dilute HCI

CH₃COCI

The formula of ketone is

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None of these

Which is not the affect of polluted air on environment

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Acid rain

Smog

Ozone

Global warming

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

Out of Cu, Ag, Fe and Zn the metal which can displace all others from theri salt solution is

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Ag

Cu

Zn

Fe

Which of the following is present in the stings of bees and wasps

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Formic acid

Citric acid

Carbolic acid

Formalin

The atomic mass is measured in atomic mass unit (a.m.u.) which is equal to

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1.661 x 10^{-27- Kg}

1.661 x 10^-24Kg

1.661 x 10^{-27- g}

1.661 x 10^-24mg

When acetic acid and ethanol react together an ester is formed which is called

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Ethyl ester

Ethanoic acid

Ethyl acetate

Alkyle magnesium halides are known as

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Simon-smith reagent

Tollen's reagent

Grignard's reagent

Barford's reagent

A solution of glucose is of methanol in water has vapor pressure :

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Equal that of water.

Equal to that of methanol.

More than that of water.

Less than that f water.

Acetic acid is also named.

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Methanoic acid

Ethanoic acid

Propanic acid

Butanoic acid

In the hydrolysis of CH₃COOC₂H₅the acid produced is

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Inhibitor

Catalyst

Auto catalyst

None of above

The positive ion is always smaller than the neutral atom while the negative ion is always bigger than the neutral atom. The atomic and ionic radii of Na, F, Na⁺, F^-are in ppm

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Na F Na⁺ F^-

157 72 95 136

Na F Na⁺ F^-

157 95 172 136

Na F Na⁺ F^-

72 95 136 157

Na F Na⁺ F^-

157 136 95 72

5-d series is in the period :

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4th

5th

6th

7th

Ethyl alcohol prepared during fermentation is pure:

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20%

10%

11%

12%

Which of the following molecules have multiple bonds

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CH₄

C₂H₄

C₂H₆

CCI₄

96500 C of electricity liberates from CuSO₄solution

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63.5 g of Cu

31.75 g of Cu

96500 g of Cu

100 g of Cu

Ethanol can be converted into ethanoic acid by

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Hydrogenation

Hydration

oxidation

Frmentation

The cell in which a non-spontaneous redox reaction takes place as a result electricity is known as :

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Electrolytic cell.

Voltaic cell.

Daniel cell.

Dry cell.

Toluene can be oxidized to benzoic acid by

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KMnO₄(alk)

K₂Cr₂O₇(acidic)

Both

None

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

Which is not a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

Which one of the following enzymes brings about the hydrolysis of fats

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Urease

Maltase

Zymase

Lypase

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8

4

9

3

A chemical reaction A---------->B is said to be in equilibrium when :

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Rate of transformation of A to B is equal to B to A.

50% reactant has been changed to B.

Conversion of A to B is 50% complete

Complete conversion of A to B has taken place.

When sodium benzoate is treated with soda lime (NaOH) benzene is formed. What is the other product

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Na₂CO₃

NaHCO₃

Ca(OH)₂

CaCO₃

The formula of curprite is

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Cu₂S

Cus

Cu₂O

CuCO₃

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