Question # 1

The ionization energy of hydrogen atom is

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Zero

131.3kJmole

13.13kJ/mole

1313kJ/mole

Glucose is a:

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ketohexose

aldohexose

meonosacharide

'b' and 'c'

Lonic solids are characterized by:

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low melting points

_{good conductivety in solid state}

high vapour pressures

solubility in polar solvents

When water freezes at 0°C, its density decreases due to

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cubic structure of ice

empty spaces present in the structure of ice

change of bond lengths

change of bond angles

When chlorofluoro carbon are subjected to U.V they form

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Cations

Aninons

Free radicals

None of these

In which of the following processes the liquids are made to boil at low temperature

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Vacuum distillation

Destructive distillation

Distillation

Vacuum destructive distillation

Which of the following statement is correct if the intermolecular forces in liquids A,B and C are in the order A < B < C?

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B evaporates more readily than A

B evaporates less readily than C

A and B evaporates at the same rate

A evaporates more readily than C

Monosacharides belong to the group:

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fats

lipids

carbhohydrates

proteins

C₆H₁₂O₆is molecular formula of:

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Glucose

Dextrose

Fructose

All of these

Which pair of elements will have the same type of bonds between their atoms in the solid state?

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carbon and calcium

lithium and boron

aluminium and phosphorus

nitrogen and carbon

CFCs are mainly used in industries due to

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Low cost

Gaseous nature

High reactivity

Un stability

The reference calomel electrode is made from which of the following?

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ZnCl₂

CuSO₄

Hg₂Cl₂

HgCl₂

Most reactive halide towards S_N1 reaction is

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n-Butyl chloride

sec-Butyl chloride

tert-Butyl choride

Allyl chloride

The difference of potential of two electrodes when concentration of solution is 1M each at 25°C and1 atm is called :

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Cell reaction.

Electrode potential.

Cell voltage.

Standard cell potential.

Which compound is called a universal solvent?

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H₂O

CH₃OH

C₂H₅OH

CH₃----O---CH₃

The fourth period contains elements

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8

16

18

32

Who one mole of each of the following is completely burned in oxygen, which gives the largest mass of carbon dioxide?

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Carbon monoxide

Diamond

Ethane

Methane

The equilibrium constant in a reversible chemical reaction at a given temperature

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Depends on the initial concentration of the reactants

Depends on the concentration of one of the products at equilibrium

Does not depend on the initial concentration of rectants

It is characteristic of the reaction

Reaction of Griganard's reagent with CO₂gives:

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Aldehyde

Pri-alcohol

Sec-alcohal

Carboxylic acid

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[A] = [B]

[A] < [B]

[B] = [C]

[A] > [B]

The rate at which a substance reacts is directly proportional to its active mass and the rate of reaction is directly proportional to the product of the active masses of reacting substances, is called

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Law of conservation of energy

Le-Chateliers principle

Law of mass action

None of these

The relative lowering of vapour pressure is equal to the mole fraction of the solute, This law is called

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Henry's law

Raoult's law

Ostwald's law

Arrhenius law

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