Question # 1

The ratio of volume to temperature on Kelvin scale is constant according to:

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Charle's law

Newton's law

Coulomb's law

Boyle's law

The number of resonating structures of phenoxide ion are

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3

5

6

4

The stoichiometric calculations for a chemical reaction results in

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Actual yield

Percentage yield

Theoretical yield

Selectivity

The values of ∆H for the process l(g)+e-1--------->
I-1(g) is:

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>0

<0

0

None

The major binding force of diamond,silicon and quartz is

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Electostatic force

Electical attraction

Ceobalent bond force

Non convalent bond force

H-bonding is maximum in:

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ethanol

benzene

diethyl ether

water

In s solution 7.8 g of benzene ( C6H6 ) and 46g of toluene (C6H5CH3) is present. The mole fraction of toluene is

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1/3

1/5

2/3

5/6

Which one of the following statements about glucose and sucrose is incorrect:

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both are soluble in water

both are naturally occurring

both are carbohydrates

both are disacharides

Among the following the polycyclic aromatic compound is

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Styrene

Naphthalene

Toluene

Acetophenone

Vegetables oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

Carboxylic acid is more acidic than phenol because of the greater stability of

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Carboxylic acid

Phenoxide ion

proton

Carboxylate ion

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

Which compound is more soluble in water?

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C₂H₅OH

C₅H₅OH

CH₃OCH₃

n-Hexanol

CH₃CH₂COOH is also named as:

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Propionic acid

Propanoic acid

Acetic Acid

Both (a) and (b)

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

Transition elements form which type of bond

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Ionic bonds only

Covalent bonds only

Ionic and covalent bonds

Polar bonds

A zero order reaction is one in which :

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Rate is not affected by changing concentration of reactants.

concentration of reactants do not change with the passage of time.

Reactants do not react.

One reactants in large excess.

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

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Uninfluenced by occurrence of thuderstorm

Which depends on the amount of dust in air

Slightly lower than that of rain water without thunderstorm

Slighlty higher than that when the thunderstom is not there

Which one of the following reaction takes place spontaneously

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How many moles of oxygen, O₂are needed for the complete combustion of two moles of butane C₄H₁₀?

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2

8

10

13

Product of concentration of ions raised to the power equal to the co-efficient of ions in balanced equation for saturated solution of a salt is called

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Ionic product

Equilibrium constant K_c

K_w

Solubility product (K_sp)

Cotton has cellulose in it:

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96%

97%

98%

99%

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