Question # 1

The vapour density of a gas is 11.2 The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 liters

11.2 liters

1 liter

2.24 liters

Chile salt petre is

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NaNO₃

Na₂SO₄

KNO₃

Na₂S₂O₃

When KCIO₃ is heated it decomposes into KCI and O₂ if some MnO₂ is added the reaction goes much faster because

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MnO₂ decomposes to give O₂

MnO₂ provides heat by reacting

Better contact is provided by MnO₂

MnO₂ acts as a catalyst

Which of the following is a molecular disease?

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Allergy

Cancer

German measles

Sickle cell anemia

The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends on

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Pressure of the gas

Temperature of the gas

Volume of the gas

Pressure temperature and volume of the gas

The order of reactivity of halogens in aliphatic substitution reactions is

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Br2 > CI2 > F2

CI2 > Br2 > F2

CI2 CI2 > Br2

F2 > Br2 > CI2

The unit of rate constant for a zero order reaction is

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Liter sec^-1

Liter mol^-1sec^-1

Mol liter^-1sec^-1

Mol sec^-1

In which molecule carbon atom is sp² hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

Which of the following belongs to the halogen family?

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Francium

Polonium

Radium

Astatine

Which has largest first ionization energy?

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Li

Na

K

Rb

The addition of HBr is easiest with

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CH2 = CHCI

CICH = CHCI

CH3 - CH = CH2

(CH3)2 C = CH2

What happens when isotonic solution of a (mol. wt. 342) and B (mol. wt 60) are put in to communication through semiperme-able membrane?

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Transference of solvent from solution A to that of B take place

Transference of solvent from solution B to that of A takes place

No transference of solvent from solution A to that of B takes place

Change in temperature of solutions takes place.

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysis

Which of the following is acidic?

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SO₃

N₂O

BeO

HgO

Which one of the following elements occurs free in nature?

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N

P

As

Sb

Acetylene gives

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White ppt. with ammonical AgNO₃and red ppt. with ammonical Cu(NO₃)₂

White ppt. with ammonical AgNo_{3 and red ppt. with ammonical}Cu₂Cl₂

White ppt. with both

Red ppt. with both

The pure crystalline substance on being heated gradually first forms turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears. The behaviour is a characteristic of substance forming

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Allotropic crystal

Liquid crystals

Isomeric crystals

Isomorphous crystals

An electrolyte

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Forms complex ions in solution

Gives ions only when electricity is passed

Possesses ions even in solid state

Gives ions only when dissolved in water

Setting of Plaster of Paris involves

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Oxidation with atmospheric

Combination with atmospheric CO₂

Dehydration

Hydration to yield another hydrate

Rusting of iron is catalysed by

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Fe

O₂

Zn

H⁺

Which of the following compounds has the lowest anion to cation size ratio?

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LiF

NaF

Csl

CsF

Which of the following is directly related to Qualitative analysis?

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Identification

Separation

Measurement

Calculation

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