Question # 1

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

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

In exothermic reaction decrease in potential energy of the products will result in

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Decreases in kinetic energy of the particles

Increases in kinetic energy of the particles

No change in kinetic energy

Decreases in activation energy

Coupling of Pb with its Pb⁺⁺/Pb = -0.13 V and Ag with Ag⁺/ Ag = +0.80 V, the cell reaction

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The chemist who synthesized urea from ammonium cyanate was

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Berzelius

Kolbe

Wholer

Lavoisier

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At equilibrium there is no further change in the concentration of Hl

At equilibrium concentration of l₂remains constant

At equilibrium concentration of H₂remains unaltered

At equilibrium the rate of formation of Hl is equal to the rate of decomposition of Hl

Enzymes are chemically

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Carbohydrates

Proteins

Fatty acids

Phospholipids

Among the elements given below, the one with highest electropositivity is

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Cu

Cs

Cr

Ba

Which is independent of temperature

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Molarity

Molality

Normality

Mole fraction

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Addition Elimination

Addition Reduction

Elimination Reduction

Substitution Elimination

By applying Hess's law, we can calculate

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ΔH

ΔS

ΔF

K

In which of the following cases, the reaction goes farthest to completion

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K = 10³

K = 10^-2

K = 10

K = 10⁰

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Ionization energies increase from left to right along the period due to

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Increase in nuclear charge

Repulsion of electron increases

Repulsion of protons increase

Atomic size increase along the period

The oxides of which of the following elements will be acidic in character

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Mg

Rb

Li

Cl

The simplest and the parent members of aromatic hydrocarbon is

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Benzene

Toluene

Biphenyis

Naphthalene

Ozone in most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

Reduction of aldehydes with HI and P gives

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Primary alcohols

Secondary alcohols

Alkanes

Tertiary alcohols

In ter-butyl alcohol, the tertiary carbon is bonded to

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Two hydrogen atoms

Three hydrogen atoms

One hydrogen atoms

No hydrogen atom

Aldehydes are reduced to :

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Pri-alcohol

Sec-alcohol

Ter-alcohol

All of these

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

All covalent bonds formed between the two atoms are non-polar when

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Covalent bond between two non-metal atoms

Covalent bond between metal and non-metal

Covalent bond between two atoms of same element

Covalent bond between metal atoms

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The value of K_pfalls with rise in temperature

The value of K_pfalls with increasing pressure

Addition of V₂O₅catalyst increase the concentration of SO₃

The value of K_pis equal to K_c

The method used only for the production of symmetrical alkanes

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Kolb's method

Clemmenen

Cannizzaro

Wolf kishner

If ionic product of a solution is greater than solubility product, the solution is

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Supersaturated

Saturated

Unsaturated

None of these

The number of subatomic particles in atoms sidcovered is more than:

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110

100

125

90

If pH of buffer of 1 mole dm^-3of HCOOH + 0.1 mole dm^-3HCOONa having pKa = 3.78 is

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1.78

2.78

3.78

4.78

In a solution of CuSO₄how much time will be required to precipitate 2g copper by 0.5 ampere current?

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12157.48 sec

102 sec

510 sec

642 sec

Which step is unnecessary for purification of water for drinking purposes

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Aeration

Coagulation

Treatment with chlorine

Treatment with iodine

Which of the following elements is most electronegative?

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Oxygen

Chlorine

Nitrogen

Fluorine

SnCI₂have ______ shape

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Planner

Tetrahedral

Angular

None

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