Question # 1

If a salt bridge is removed from two half cells the emf is

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Increased

Decreased

Dropped to zero

Electrodes will be reversed

The composition mixture of clay and lime stone in a raw material is:

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75% limestone & 25% clay

15% limestone & 55% clay

25 limestone & 75% clay

55% limestone & 15% clay

Plaster of Paris is obtained from

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marble

bauxite

gypsum

limestone

At higher temperature isotherm moves away from y-axis because of increase in

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Pressure

Number of moles

Volume

Mass

A gas has non-ideal behaviour at:

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high temperature and high pressure

low temperature and low pressure

high temperature and low pressure

low temperature and low pressure

The reduction potentials of non-metals are A =+0.54V, B=+1.08V, C=+1.36V. D= +2.87V Which non -metal can displace all other from aqucous solution of their salts

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A

C

B

D

Which of the following is basic amino acid

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Lysine

Histidne

Proline

Both a and b

Under which condition CO has the maximum molar volume.

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high T and P

Low T and High p

high T and low pressure

Low T and low P

Which of the following is not a macromolecule?

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diamond

graphite

iodine

silica

Which ion has maximum number of unpaired electrons in 3d subshell and shows maximum paramagnetic behavior?

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Cr+3

Ni+2

Co+2

Fe+3

Amount of ozone in atmosphere is expressed in units:

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Kilograms

cm

molarity

DU

Given below are some statements concerning formic acid, which of them is true?

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It is a weaker acid than acetic acid

It is a reducing agent

When its calcium salt is heated, it forms a ketone

It is an oxidizing agent

The osmotic pressure of solution increases if

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Temperature is decreased

Solution constant is increased

Number of solute molecules are increased

Volume is increased

A solution of two component is called

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Binary solution

Dilute solution

Original solution

Standard solution

Pick out the wrong statement. In electrochemical cell

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Electrons are released at anode

Cathode is regarded as negative electrode

Chemical energy is converted into electrical energy

Salt bridge maintains the electrical neutrality of the solution

The rate of reaction :

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Decreases as the reaction proceeds

Increases as the reaction proceeds

May decrease or increase reaction proceeds

Remains same as the reaction proceeds

The next homologue of C₁₀H₂₂will be

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C₉H₂₀

C₁₂H₂₆

C₁₁H₂₄

C₁₃H₂₈

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

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Static

Dynamic

Homogeneous

Heterogeneous

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

S-block elements consist of

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Alkali metals

Alkaline earth metals

Alkali and alkaline earth metals

None of these

Which of the following has zero depole-moment?

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CIF

PCl₃

SiF₄

CFCl₄

The valence shell of hydrogen is half filled like those of

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IV - A

VIA

V - A

VIIA

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