Question # 1

Which one of the following is an appropriate indication of positive iodoform test?

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Formation of H2O

Brick red precipitate

Release of H2 gas

Yellow precipitate

The units of ionic product of H2O is

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Mole dm-3

Mole2 dm-6

Mole-1 dm-3

Mole-2 dm-6

An electron with drawing group attached to e-position in phenol

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makes it basic

Stabilises the phenoxide ion

decreases its basicity

allows it to precipitate in aqueous solution

Low IE is a symbol of

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high electronegativity

small size

High electron affinity

Metallic character

For a chemical reaction which can never be a fractional no

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order

molecularity

half-life

rate constant

Which property of liquid is measured by polarimeter

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Conductance

Optical activity

Refractiye Indéx

Change in volume

Which one of following property is not true about alkali metals?

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Strongest bases due to their hydrides

Low ionization energy

Oxidation number more than +1

Form acidic oxides

Which of these is a synthetic polymer

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Polypeptide

Cellulose

Polyester

Starch

If empirical formula of a compound is CH2 and its molecular mass is 56amu. What will beits molecular formula

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CH2

C3H6

C2H4

C4H8

Which woody raw material is used for the manufacture of paper pulp?

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cotton

bagasse

poplar

rice staw

Which of the following substance is not present in acid rain?

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Sulphuric acid

Nitric acid

Sulphurous acid

Acetic acid

Which of the following correctly describes the process occurring at the electrodes when molten NaCl is electrolyzed:

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No reaction at anode, reduction at cathode.

No reaction at cathode, oxidation at anode.

Oxidation at anodes, reduction at cathode.

Oxidation at cathode, reduction at anode.

Molecular orbitals are filled with the available electrons according to:

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Hund's of rule.

Pauli's exclusion principle.

Aufbau principle.

All of above.

Which has maximum protein content?

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Ground nut

Cow milk

Egg

Wheat

The depression of freezing point is directly proportional to

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Mole fraction of the solution

Molarity of the solution

Molality of the solution

Molarity of the solvent

Alcohols are named by replacing 'e' of alkane with:

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al

ene

ol

one

Direct conversion of solid into vapors is called :

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Crystallization

Sublimation

Obligation

Vaporization.

1-butene an 2-butene are an example of

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Chian isomerism

Positional isomerism

Metamerism

Functional group isomerism

When a carbon atom forms single bonds with other carbon atoms, these hybrid orbitals overlap with the orbitals of hydrogen to form four bonds which are

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Three sigma and one P_i

Two sigma and two P_i

One sigma and three P_i

sigma

When ethyl iodide and n-propyl iodide are allowed to react with sodium metal in ether, the number of alkanes that could be produced is

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Only one

Two alkanes

Three alkanes

Four alkanes

The reaction of acetaldehyde with HCN followed by hydrolysis gives a product which exhibits

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Metamerism

Tautomerism

Enatiomerism

Geometrical isomerism

Ammonia like water also reacts with Grignard's reagent to give

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Alkane

Alkene

Alkyne

Amide

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