Question # 1

In the atmosphere, O₂is about

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10%

15%

21%

25%

Charge to mass ratio of electron was discovered by:

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Millika.

Rutherford.

J.J. Thomson.

Chadwick.

The largest number of molecules are present in

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3.6 g of H₂O

4.8 g of C₂H₅OH

2.8 g of CO

5.4 g of N₂O₅

Write the name of following compound

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5 - methyle - 2- hexene

2 - methyle hexene

4 - ethyle - 2 - methyle hexene

3 - ethyle - 3 - methyl hexene

Amino acids contain functional groups in it:

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--CO--

--OH

---NH₂

All of these

It is common observation that rates of chemical reactions differ :

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Greatly.

A little bit.

Moderately.

Which of the following is not fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

A six membered ring containing one double bond called

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Cyclohexene

Cyclohexane

Cyclohexadiene

None

The amount of heat evolved or absorbed in a chemical reaction indicated by balanced chemical equation at 25° and one atmospheric pressure is called

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Enthalpy of formation

Enthalpy of neutralization

Enthaply of combustion

Enthaply of reaction

Which of the substances Na, Hg, S Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

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Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

Gypsum is a common mineral of

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Magnesium

Strontium

Calcium

Barium

DNA is a polynucleic acid. The monomer is known as a nucleotide. What is not the component of the nucleoptide

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Phosphate group

Deoxy ribose sugar

Uracil base

Adenine base

Tetraethyle lead causes disease:

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Typhoid

Respiratory

Stomach

Muscular

During redox reaction an oxidizing agent

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Gains electrons

Is oxidized

Loses electrons

Hydrolysed

The atom of an element is

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The smallest particle

The fundamental particle

The independent particle

The charged particle

pH of the human blood which is essentially maintained constant due to carbonates, biocarbonates, phosphates etc., is

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7.00

7.25

7.35

7.47

Which statement is incorrect about standard hydrogen electrode

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Its oxidation and reduction potential is zero

It consists of Pt wire dipped on 1 molar HCI solution

The electrolyte is 1 molar NaOH solution

H₂gas is passes in it at 1 atmospheric pressure

The ph of 10-3 mole dm-3 of an aqueous solution of H₂SO₄ is :

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3.0

2.7

2.0

1.5

The quantum number which determines the shape of the orbital is

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principal

azimuthal

magnetic

spin

Statement enthalpy of combustion of H₂is -285.8 KJ mole^-1then which is the standard enthalpy of formation of water

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+285.8 KH mole^-1

-285.5 KJ mole^-1

Zero

-218 KJ mole^-1

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

The factor which effect the rate of reaction

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Nature of reactants

Surface area

Light

All of the above

A solution is a homogeneous mixture of two or more kinds different :

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Molecular.

Covalent substance

Ionic Substances

Both (a) and (c)

The number of coulombs required for the deposition of 107.870 g of silver is

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96500

48250

193000

10000

Which woody raw material is used of the manufacture of paper pulp

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Cotton

Bagasse

Poplar

Rice straw

For which system does the equilibrium constant. K_chas units of

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The use of tetra ethyl lead in petrol as an efficient antiknock agent is being discouraged. Which reason is correct

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It is costly

It damages the engine

Pb is difficult to obtain in bulk quantities

The combustion product, lead, causes air pollutions

The geometry of 4 sp³hybrid orbitals on an atom is

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Square planar

Tetrahedral

Trigonal planar

Linear

The oxidation number of free element is always taken to be

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0

1

2

-1

Picric acid is

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2, 4, 6-Trinitrotoluene

2, 4, 6-Tribomoethanol

2, 4,6-Trinitrophenol

Para-Nitrophenol

Alkaline earth metals posses two electrons in their outermost

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F-orbital

D-orbital

S-orbital

P-orbital

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