Question # 1

If the rate equation of a reaction 2A+B-------->Products is , Rate = K[A] [B], and A is present in large excess, then order of reaction is :

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1

2

3

Above

Osmotic pressure of a solution increases by

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Decreasing the temperature

Increasing the volume

Increasing the number of molecules of the solute

None of the above

If ionic product of a solution is greater than solubility product, the solution is

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Supersaturated

Saturated

Unsaturated

None of these

Pick up the correct statement

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CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog

Classical smog has an oxidizing character while the phtochemical smog is reducing in character

Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours

During formation of smog the level of ozone in the atmosphere goes down

The empirical formula of a liquid compound is known to be C₂H₄O. What other information is needed to work out its molecular formula?

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The percentage composition of the compound

The relative molecular mass of the compound

The density of the compound

The volume occupied by one mole of the compound

Factor which slows down the rate of reaction is

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Small size of the particles of the reactant

High temperature of reaction

More concentration of reactant

Lowering the temperature

When benzene is burnt in free supply of air, it is completely oxidized to

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CO

CO₂₊H₂O

H₂CO₃

None

Formic acid is obtained when

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Calcium acetate is heated with conc.H₂SO₄

Calcium formate is heated with calcium acetate

Glycerol is heated with oxalic acid

Acetaldehyde is oxidized with K₂Cr₂O₇and H₂SO₄

DNA has deoxyribose, a base and the third component is

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Phosphoric acid

Ribose

Adenine

Thymine

Ethylene combines with water in the presence of H₂SO₄+ HgSO₄and forms

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Ethyle chloride

Ethyle alcohol

Carboxylic acid

None of these

When fused PbBr₂is electrolyzed

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Bromine appears at he cathode

Lead is deposited at the cathode

Lead appears at the anode

None of these happens

A carbon atom carrying a postitive charge and attached to three other atoms of groups is called

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Caronium ion

Carbanion

Oconium ion

Carba ion

Fungicides are the pesticides which

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Control the growth of fungus

Kill insects

Kill plants

Kill herbs

Benzophenone can be converted into benzene using

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Fused alkali

Anhydrous AlCl₃

Sodium amalgam in water

Acidfied dichromate

If four moles of sulpur dioxide are oxidised to sulphur trioxide, how many moles of oxygen molecules are required

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0.5

1.0

1.5

2.0

Sintered glass is porous material used for:

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Absorption

Decoration

Filtration

All of above

Sintered glass is a porous material use for :

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Absorpton

Decoration.

Filtration.

All of above.

Smallest charge of electricity that has been measured so far is

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Charge on a-rays

Charge on electron (1.602 x 10^-19C)

Charge on x-rays

Charge on gamma rays

Enzymes catalyse all biological reactions occurring in the cell. What is true about an enzyme

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Enzyme is a small molecule

Enzyme is acidic in nature

Enzyme is a protein

Enzyme is a lipid

The fiber which is made from acrylonitrile as monomer:

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PVC

Rayon Fiber

Acrylic fiber

Polyester fiber

The color of ppts formed by Fehling's test is

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Brick red

Red

Yellow

Orange

Which set of hybrid orbitals has planar triangle shape?

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sp³

sp

sp²

dsp²

Heat,. work and internal energy of the system and surroundings are related into an equation which is called

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First law of thermodynamics

Hess's law

Henry's law

Born-haber cycle

In OF₂, number of bond pairs and Ione paris of electrons are respectively

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2,6

2,8

2,10

2,9

The term ebullioscopy is used for

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Depression of freezing point

Elevation in boiling point

Lower of vapour pressure

None of the above

Which one of the following will have the maximum dipole moment

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CH₃F

CH₃Cl

CH₃Br

CH₃l

Which of the following is not a property of cathode rays

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They can produce x-rays when they strike a heavy metal anode

They can cause reduction reaction

They produce fluorescence in rare earth and minerals

They comprise neutral particles

Aldehydes are reduced to :

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Pri-alcohol

Sec-alcohol

Ter-alcohol

All of these

Factors affecting denaturation of proteins:

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Change in temp and pH

Strong reducing agent

Strong oxidizing agent

All of these

The relative abundance of Pb isotopes is 1.5% Pb²⁰⁴, 23.6% Pb²⁰⁶, 22.6% Pb²⁰⁷, 52.3% Pb²⁰⁸The relative atomic mass of Pb is

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207.94

208.24

206.94

207.24

Mottling of teeth is due to presence of an element in drinking water

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Mercury

Fluorine

Boron

Chlorine

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