Question # 1

Which of the following activates phosphatase enzyme

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Ca²⁺

K⁺¹

Mg²⁺

Zn²⁺

In Boyle's law which of the following pair remains constant:

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Temperature and quality of a gas.

Pressure and quality of a gas.

Temperature and pressure.

Temperature and quantity of a gas.

Exhaust fumes of cars contain which poisonous gas

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CH₄

C₂H₆

CO

All of these

Chlorofluorocarbons and aerosols are inert in sphere:

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troposphere

stratosphere

lithosphere

hydrosphere

Grey tin crystals belong to

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tetragonal

cubic

orthorhombic

rhomtrohedral

Smell of cooking gas during leakage from gas cylinder is detected because of the property of:

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Effusion

Evapotration

Diffusion

Conduction

The number of unpaired electrons present in Fe ions is

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1

2

5

0

AgNO₃ is a polymorphic having two different crystalline forms which are

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cubic, tetragonal

monoclinic, hexagonal

cubic, orthorhombic

orthorhombic, rhombohedral

What is the cause of water pollution

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Chemical and bacterial constants in live stock

The spilled oil in rivers and ponds

Wide spreads used of pesticides

All of these

The stoichiometric calculations for a chemical reaction results in

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Actual yield

Percentage yield

Theoretical yield

Selectivity

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

The volume of 0.1 M H₂SO₄required to neutralize completely 40 ml of 0.2 M NaOH solution is

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10 ml

40 ml

20 ml

50 ml

What is the name of the comlex [Ni(CO)₄]

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Tetracarbonylnickel (o)

Tetracabonylnickel

Tetracabonylnickel (II)

Tetracabonylnickel (IV)

A carboxylic acid with one caboxyl group:

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Monocarboxylic acid

Dicarboxylic acid

Tricarboxylic acid

Polycarboxylic acid

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Condensation

Electrophilic substitution

Free radical substitution

Nucleophilic substitution

Aromatic hydrocarbons are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane

In which type of following solutions we don't know the total volume of the solutions :

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Percentage weight/weight

Percentage weight/volume

Percentage volume/volume

Percentage volume/weight

C₁₈and onward hydrocarbons are normally

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Gases

Liquids

Solids

Plasma

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

Which is not a steroid

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Cholesterol

Ergosterol

Phospholipids

None of these

Decreases om concentration of reactant is denoted by

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dc/dt

-dc/dt

+dc/dt

None

An organic compound will decolorise dill acidified (aq) KMnO₄on warming, but will not decolorise bromine water. What is the compound

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KMnO₄

Ethanol

Ethane

CH₃CH₂Cl

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