Question # 1

Example of essential aromatic amino acids

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Theronine

Alanine

Phenyl alanine

Glycine

The semi solid wastes in landfills is called:

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Landfill

effluents

Leachate

Incineration

Number of electrons involved in d-d transition of [Ti(H2O)6]+3

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1

3

2

4

Simplest Structure of a protein that has only covalent bonding between amino acids is

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2° structure

3°structure

1° structure

4° structure

Heat balance of earth is maintained by sphere:

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Hydrosphere

atmosphers

lithosphere

biosphere

About 25% of earth crust mass is made up of element

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Oxygen

Silicon

Aluminium

Aluminates

A line parallel to x-axis is obtained when graph is drawn between

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Volume on abscissa & pressure on ordinate

Volume on abscissa & PV on ordinate at all conditions

Pressure on abscissa & PV on ordinate at constant temperature

None of these

The change in enthalpy of a system when one mole of the substance is completely burnt in excess of air or oxygen is called

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Heat of reaction

Heat of formation

Heat of atomization

Heat of combustion

Substances that tend to decrease the activity of enzymes are called

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coenzyme

activators

inhibitors

apoenzyme

A fat or oil is characterized for extent of unsaturation by one of the following number. Which one is:

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acid number

saoilucfucation umber

rancidity number

iodine number

Saturated hydrocarbons having carbon atoms more than 20 in a molecule are solids due to

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higher densities

higher molar masses

the chain, are more zig-zag

all are correct

The formula of curprite is

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Cu₂S

Cus

Cu₂O

CuCO₃

Acetamide and NaOBr/OH^-produce

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Ethanamine

Methanamide

CH₃CN

NH₃

Which of the following favours the reverse reaction in chemical equilibrium?

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Increasing the concentration of the reactant

Removal of the least one of the products at regular intervals

Increasing the concentration of one or more of the products

None of these

In passage of electricity through aqueous solution of AgNO₃silver dissolves at anode to form Ag⁺, the electrodes are

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Silver metal

Pt metal

Graphite

Copper metal

Ammonia is injected under the soil surface:

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1 Feet

6 inches

6 Feet

9 inches

The element with atomic number 55 belongs to which block of the periodic table

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s-block

p-block

d-block

f-block

[Zn(NH₃)₄]³⁺possess geometry

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Square plannar

Hexagonal

Tetrahedral

None of these

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

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Lowering in b.pt

Reducing viscosity

Reducing specific heat

Lowering in freezing pt

The active part in a molecule is called

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Homologous series

Functional group

Chemical bonding

Ionic complex

Benzene was discovered by Michael Faraday's in

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1824

1825

1826

1827

BiCl₃on hydrolysis forms a white precipitate of

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Bismuthio acid

Bismuth oxychloride

Bismuth pentachloride

Bismuth hydroxide

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