Question # 1

Which of the following half molar solutions will have lowest freezing point

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Solution of non-volatile, none electrolyte

Solution of non volatile, weak electrolyte

Solution of non volatile strong electrolyte

Solution of volatile, non electrolyte

Calculate the amount of charge flowing in 2 minute in a wire of resistance 10Ωwhen a potential difference of 20 V is applied

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120 C

240 C

20 C

4 C

A compound used as eye wash:

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Borax

Boric acid

Metabolic acid

Pyroboric acid

The driving force for making a bond is

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To attain noble gas electronic configuration

To make soled compounds

To make different compounds

To make gaseous substances

Organic synthetic or man made polymers are plastics, rubber and fibre. Which is not a synthetic polymer

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Silk

Polyester

Polyvinyl chloride

Nylon

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Condensation

Electrophilic substitution

Free radical substitution

Nucleophilic substitution

What is the shape of Fe(CO)₅molecule?

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Tetrahedral

Octahedral

Trigonal bipyramidal

Square pyramidal

Which of the following isoelectronic ions has the lowest ionization energy?

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K⁺

Ca²⁺

Cl^-

S^2-

Which of the following has highest oxidation potential

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Be

Li

Na

Ca

The vapour pressure of two liquids 'p' and 'Q' are 80 and 60 torr respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mol of Q would be

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140 torr

20 torr

68 torr

72 torr

If half life period of a reaction is independent of the concentration of the reactants, then the reaction is

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Zero order

First order

Second order

Order is in fraction

CO+ is an example of

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Stable molecule

Anionic molecule ion

Cationic molecular ion

Free radical

Standard reduction electrode potential of three metals A, B and C are erespectively + 0.05 V, -3.0 and -1.2V. The reducting power of

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B > C > A

A > B > C

C > B > A

A > C > B

An azeotropic mixture of two liquids boils at a lower temperature than either of them when :

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It is saturated.

It shows positive deviation from Raoult's law.

It show negative deviation from Raoult's law.

It is metastable.

For a chemical reaction to take place the particles must have sufficient energy for the effective collisions, the energy is called

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Average energy

Activation energy

Potential energy

Collision energy

The raw material to form nylon is

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Adipic acid

Butadiene

Isoprene

Ethylene

Formalin is an aqueous solution of

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Furfural

Fluorescein

Formaldehyde

Formic acid

The tip of the funnel should touch the side of the beaker in order to avoid

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Splashing

Leakage

Mixing

Contamination

An azeotropic mixture showing it's positive deviation from Raoult's law, the volume of the mixture is :

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Slightly more than the total volume of the components.

Slightly less than the total volume of the components.

Equal to the total volume of the components.

None of these.

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

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Two

Three

One

Four

The radius of first orbit of H-atom is

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4.75 A°

3.84 A°

8.4 A°

0.529 A°

Vegetable oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

Which of the following compounds on oxidation gives benzoic acid?

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Chlorophenol

Chlorotoluene

Chlorobenzene

Benzyl chloride

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Moles^-2dm⁺⁶

No units

Mole dm^-3

Mole^-1dm^-3

The elements of group lA are called

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Chalocogens

Halogens

Alkali metals

Alkaline earth metals

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

Kinetic energy of the molecules is due to

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Transnational motion

Rotational motion

Vibrational motion

All of these

Where lime is not used

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In refining or metals

In paper industry

In glass industry

In the preparation of NaOH

Proton was discovered by:

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Chadwick

J.J. Rhomson

Millikan.

Goldstein.

The process in which the solvent molecules are surrounded and interact with solute ions or molecules is called

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Solvation

Hydration

Hydrogenation

None

In the particular reaction for the valueK_{c 1 x}10^-25which statement is correct :

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Almost forward reaction is completed.

Amount of reactant is negligible as compared to product.

Amount of product is negligible as compared to reactant.

Amount of product is equal to amount of reactant.

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