Question # 1

Both E₁and E₂mechanism can be shown by

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1° - RX

2° - RX

3° - RX

None of these

At 25°C, the highest osmotic pressure is exhibited by 0.1 M solution of

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CaCl₂

KCl

Glucose

Urea

When SO₂is passed through acidified K₂Cr₂O₇solution

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The solution turns blue

The solution is decolourised

SO₂is reduced

Green Cr₂(SO₄)₃is formed

Select from the following which one is alcohol?

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CH₃-CH₂-OH

CH₃-O-CH₃

CH₃COOH

CH₂-CH₂-BR

The quantum number which determines the shape of the orbital is

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principal

azimuthal

magnetic

spin

Chemical equilibrium involving reactants and products in more than one phase is called

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Static

Dynamic

Homogeneous

Heterogeneous

The method involved for electrolysis of Na or K salts of carboxylic acids

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Sabatier's sendrens reaction

Kolbe's method

Clemmensen

Wolf kishner reduction

The branch of chemistry which deals with thermal energy changes in chemical reactions is called

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Chemical kinetic

Thermodynamics

Thermochemistry

Mechanics

Soil remediation means

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To make it suitable for cultivation of crops

To make it acidic

To make it alkeline

To add manure into it

Which of the following brings about the conversion of starch into maltose

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Maltase

Zymase

Diatase

Invertase

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K_p> K_c

K_c> K_p

K_p= K_c

None of these

A chemical reaction A---------->B is said to be in equilibrium when :

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Rate of transformation of A to B is equal to B to A.

50% reactant has been changed to B.

Conversion of A to B is 50% complete

Complete conversion of A to B has taken place.

A pair of elements in the same family in the periodic classification is

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Cl and C

Ca and Al

N and Ne

Na and K

What will be the weight of deposited silver on passing 965 coulombs of electricity in solution of AgNO₃?

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1.08 g

2.16 g

0.54 g

0.27 g

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Initial concentration of reaction

Initial concentration of products

Final concentration of products

Order of the reaction

In an exothermic reaction, a 10° rise in temperature will

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Decrease the value of equilibrium constant

Double the value of K_c

Not produce any change in K_c

Produce some increase in K_c

Ascorbic acid contains 40.92% carbon, 4.58%, hydrogen and 54.4% oxygen. The empirical formula is

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C₃H₄O₃

C₂H₄O₃

C₃H₅O₄

C₂H₃O₁

A compound X has all of the following properties: It is a liquid at room temperature and atmospheric pressure; It does not mix completely with water; It does not decolorise acidified potassium manganate

What could X be

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Ethane

Ethanoic acid

Ethanol

Ethyl ethanoate

The correct set of quantum numbers (n,l and m) respectively of the unpaired electron of chlorine atom is

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2,1,0

2,1,1

3,1,1

3,2,1

Glacial Acetic acid is

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Pure acetic acid at 100°C

Acetic acid mixed with methanol

Pure acetic acid at 0°C

Pure acetic acid above 16.6°C

In the atomic emission spectrum the lines which appear bright, appear dark in absorption spectrum because

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The radiations emitted in emission spectrum are absorbed in absorption spectrum

Atomic emission spectrum is continuous

Atomic absorption spectrum is continuous

Distance between the lines increases

Which is the chain isomer of n-pentane

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Isopentane

Neopentene

N-pentene

Isopentene

Same amount of electric current is passed through solutions of AgNO₃and HCl. If 1.08 g of silver is obtained in the first case, the amount of hydrogen liberated as S.T.P in the second case is

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112 cm³

22400 cm³

224 cm³

1.008 g

The chemical formula of chile salt peter is

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Na₂CO₃

KNO₃

NaNO₃

NaNO₂

A compound R has all of the following properties. It is neutral; It gives an orange precipitate with 2,4-dinitrophenythydrazine; it evolves hydrogen chloride when treated with PCI₅in the cold What could R be

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As the nuclear charge increases, the pull on the electrons is increased and size of an atom:

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Decreases.

Remain same.

Increases.

Is negligible.

Among the following the most reactive towards alcoholic KOH is

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CH₂= CHBr

CH₃COCH₂CH₂Br

CH₃CH₂Br

CH₃CH₂CH₂Br

Which of the following is a colligative property?

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Melting point

Osmotic pressure

Freezing point

Sublimation temperature

Number of isomers of butane are:

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One

Two

Three

Four

When electricity is passed through molten electrolyte consisting of alumina and cryolite, 13.5 g of Al are deposited. The number of faradays of electricity passed must be

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2.0

1.5

1.0

0.5

Which of the following is a non-typical transition elements

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Cr

Mn

Zn

Fe

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