Question # 1

Solution which distill without change in composition or temperature are called

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Amorphous

Azeotropic mixture

Ideal

Super saturated

Which of the following factors does not influenced the rate of reaction

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Concentration of the reaction

Nature of the reactants

Molecularity of the reaction

Temperature

Organic compounds containing halogen atom are called:

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R---OH

R----X

R----NH₂

R----COH

Mercury is the only metal which is liquid at 0°C. this is due to its

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Very high ionization energy and weak metallic bond

Low ionization potential

High atomic weight

High vapour pressure

A cell in which electric current is produced as a result spontaneous redox reaction is called :

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Dry cell

Electrolytic cell

Galvanic cell

Standard cell

Which statement is incorrect for balancing of redox reactions by ion-electron method

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The reaction is splitted into two half reactions

H₂O and H⁺ions are added for acidic or neutral reaction to balance O and H atoms

To balance H, HCi, is added

To balance O and H in the alkaline reaction OH^-added

Which is not a steroid

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Cholesterol

Ergosterol

Phospholipids

None of these

The active part in a molecule is called

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Homologous series

Functional group

Chemical bonding

Ionic complex

Ethanol can be converted into ethanoic acid by

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Hydrogenation

Hydration

oxidation

Frmentation

Saturated solution of a solid is prepared at a constant temperature. 100 cm³of this saturated solution is evaporated in a china dish. The mass of the residue is called

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Azetropic mixture

Solubility

Solubility product

Equilibrium constant

Fatty acids are:

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Allphatic monocarboxylic acids

Dicaroxylic acids

Tricarboxylic acids

Tetracarboxylic acids

Poly carboxylic acids

Macromolecules are

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organic molecules

High molecular mass molecules

Natural compounds

Rarely occurring molecules

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

______ gives peroxide

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Li

Ba

Sr

Be

Monosaccharides belong to the group

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Lipids

Fats

Proteins

Carbohydrates

A common industrial solvent is a mixture of propanone; CH₃COCH₃, and pentyl ethanoate CH₃CO₂(CH₂)₄CH₃. Which reagent would have no effect on this solvent

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Na_(s)

NaBH₄

NaOH_(aq)

2,4-dinitrophenylhydrazine reagent

Energy of electron in an orbit according to Bohr theory is negative due to

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Repulsion of electrons in the same orb

At infinity energy is zero ad a traction towards nucleus decreases energy

Electron has negative charge

Product of positive nuclear charge and negative charge is negative

Gypsum is applied to the soil to provide calcium and

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Oxygen

Nitrogen

Phosphorous

Sulphur

Which of the following does not turn Schiff's reagent to pink?

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Formaldehyde

Bezaldehyde

Aceton

Methyl chloride

The addition of a catalyst to a reaction changes the

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Enthalpy

Entropy

Nature of reactants

Energy of activation

Which of the following compounds will not give iodoform test on treatment with I₂/ NaOH?

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Acetaldehyde

Acetone

Butane

3-pentanone

Naphthalene, iodine and NH_{4 can :}

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Sublime.

Both (a) and (c).

Crystallize.

None of above.

Toluene can be oxidized to benzoic acid by

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KMnO₄(alk)

K₂Cr₂O₇(acidic)

Both

None

Mustard gas is a :

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Gas

Liquid

Solid

High boiling point

The electrolysis of CuSO₄aqueous solution using copper as cathode as well an anode the substance which deposits at cathode is

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H₂SO₄

Oxygen

Copper

Hydrogen

According to Le-Chatelier's principal, adding heat to a solid and liquid in equilibrium will cause the

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Amount of solid to decrease

Amount of liquid to decrease

Temperature to rise

Temperature to fall

A food chemist wants to create the odour of pineapples for a product. An ester with this odour has the formula C₃H₇COOC₂H_5.Which pair of reagents would produce this ester

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C₂H₅CI and C₃H₇COOH

C₂H₅OH and C₃H₇CONH₂

C₂H₅OH and C₃H₇COOH

C₃H₇OH and C₂H₅COCI

The order of reactivity of halogen acids for reaction with C₂H₅OH is

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HCl > HBr > HI

HI > HBr > HCl

HBr > HI > HCl

HBr > HCl > HI

Phenol was discovered by:

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Hofmann

Runge

Henderson

Bakelite

Amiino acids are building blocks of:

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Protein

Carbohydrates

Lipids

Fats

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