Question # 1

The energy of the system and surrounding is conserved. This is a statement of

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Law of mass action

Law of definite proportion

Law of conservation of energy

Second law of thermodynamics

The unit of rate constant k is the same as that of the rate of reaction in

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First order reaction

Second order reaction

Third order reaction

Zero order reaction

A salt producing hydrocarbon among these compounds is

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Ehyne

Ethene

Methane

Ethane

Enzymes are chemically

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Carbohydrates

Proteins

Fatty acids

Phospholipids

Grignad reagent is reactive due to

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of above

Water H₂O is liquid while hydrogen sulphide H₂S is a gas beause

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphure has high electronegativity than oxyhe

Water molecules associate through hydrogen bonding

Which one of the following is not a nuclelphile

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H₂O

H₂S

BF₃

NH₃

The concentration units independent of temperature would be

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Normality

Mass-volume precent

Molality

Molarity

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

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A ketone

An aldehyde

An ether

Water

The tip of funnel should be 1 or 2cm larger than the circle of the

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Beaker

Solid

Filter paper

Liquid

Which of these polymers is an addition polymer

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Nylon 6,6

Polystyrene

Terylene

Epoxy resin

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 compound contains - OH in their molecule

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Alcohol

Phenol

Alcohol and phenol

Ether

The number of unpaired electrons in Mn²⁺is

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5

4

3

2

When aluminium electrode is coupled with copper electrode in a galvanic cell :

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Reduction takes place at aluminium electrode.

Oxidation takes place at copper electrode.

Reduction takes place at copper electrode.

Both (a) and (c)

The element caesium bears resemblance with

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Ca

Cr

Rubidium

None of the above

Which enzyme is not involved in fermentation of strach

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Diastase

Zymase

Urease

Invertase

What is the structure of the ester formed from propanoic acid and ethanol

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The function of salt bridge in the galvanic or voltaic cell is to

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Carry out oxidation at anode

To carry out reduction at cathode

Carry out electrolysis

To prevent the net charge accumulation in either of the half cells

Action of Zn with alkyl halides in the presence of an inert solvent forms higher alkanes. This reaction is known as

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Wurtz reaction

Frankland's reaction

Cannizaro reaction

Kalobe's reaction

The bond order of individual C - C bond is benzene is

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One

Two

Between one and two

One and two alternately

Absolute alcohol is obtained by adding rectified apirit in alcohol:

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Water

Na₂CO₃

NaOH

CaO

The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

Rectified spirit contains alcohol about:

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80%

85%

90%

95%

In a reversible reaction, two substances are in equilibrium. If the concentration of each one is reduced to half, the equilibrium constant will be

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Reduced to half of its original value

Doubled

Same

Reduced to one fourth its original value

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

The entropy of the universe

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Constant

Is equal to zero

Decreasing

Increasing

Ethyl alcohol is industrially prepared from ethylene by

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permanganate oxidation

Catalytic reduction

Absorbing in H₂SO₄followed by hydrolysis

Fermentation

Potassium superoxide has a use in breathing equipment in space crafts. The balanced equation for the reaction is

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Which compound was recognized the parent member of aromatic compounds

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Aniline

Phenol

Benzene

Toluene

Sodium is manufacture by the electrolysis of fused sodium chloride and not from an aqueous solution of sodium chloride because

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Sodium chloride does not ionize in the water solution

Sodium chloride is not soluble in water

Sodium deposited at the cathode may react with water to form sodium hydroxide

Electricity does not pass through aqueous NaCl

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