Question # 1

Which following derivative cannot be prepared directly from acetic acid?

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Acetamide

Acetyl chloride

Acetic anhdride

Ethyl acetate

The acid showing salt like character in aqueous solution is

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Acetic acid

Benzoic acid

Formic acid

α - Aminoacetic acid

The solubility of a gas in water depends upon

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Nature of the gas

Temperature

Pressure of the gas

All of the above

The pressure of vapours when sent to the ionization chamber in mass spectrometer is

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10^-5to 10^-6torr

10^-6to 10^-7torr

10^-7to 10^-8torr

10^-3to 10^-4torr

Which are used as essences (flowers)?

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Aldehydes

Ketones

Alcohols

Esters

In the reaction of oxalic acid with KMnO₄and H₂SO₄is slow at the beginning but after sometimes the reaction becomes faster due to

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Formation of MnSO₄which acts as 'Auto catalyst

Formation of CO₂which acts as 'Auto catalyst

Formation of K₂SO₄which acts as 'Auto catalyst

Evolution of O₂gas which acts as 'Auto catalyst

According to Lewis concept ethers behave as:

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Acid

Base

Acid as well as a base

None of them

Drained sewage has B.O.D

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More than that of water

Less than that of water

Equal to that of water

None of the above

95% ethanol is called :

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Rectified ether.

Diesel.

Rectified spirit.

Petrol.

For every reaction occurring in the body three is at least one type of

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Enzyme

Vitamin

Protein

Amino acid

The hydration energy is the heat evolved when one mole of gaseous ion is dissolved in water. The hydration energy of an ion

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Increases with increase of charge to mass ratio

Decreases with increase of charge to mass ratio

Depends on sign of charge +ve or -ve

Depends upon the solvent

When 6d orbital is complete, the entering electron goes into:

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7f.

7s.

7p.

7d.

Which of the following aqueous solutions have the lowest freezing point

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5.85% NaCI

6% urea

34.2 sucrose

All of them have same freezing points

Phenol was discovered by:

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Hofmann

Runge

Henderson

Bakelite

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Iodine can oxidise iron

Bromine can oxidise iron

Iodine can oxidise bromine

Iron can oxidise bromine

When the electron jumps form third, fourth, fifth orbits to the second orbit, the transitions are known as

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Paschen

Pfund

Balmer

Brackett

The value of R(General Gas Constant) is

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8.3134 JK^-1mole^-1

1.987 Cal K^-1Mole^-1

Both a and b

1.987 JK^-1mole^-1

Aqueous solution of glucose C₆H₁₂O₆, boils at 100.052°C. The solution contains

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180 grams glucose in 1 kg water

18 grams glucose in 1 kg water

1.8 grams glucose in 1 kg water

3.6 grams glucose in 1 kg

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.

To calculate volume of the solvent, we need to know, the :

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Density of solute

Normality of solute

Mass of solute

Molarity of solute

When acetic acid and ethanol react together an ester is formed which is called

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Ethyl ester

Ethanoic acid

Ethyl acetate

Which statement is not correct

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Enzymes catalyst a specific reaction

Enzymes show catalytic activity at a specific temperature

The catalytic activity of enzymes is stopped if optimum pH is changed

The catalytic activity is poisoned by a co-enzymes

Which among the following species has the highest ionization energy?

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Ne

F

Li

B

Which of the following does not exhibit the periodicity in properties of the elements?

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Ionisation energy

N/P ratio

Electronegativity

Atomic radius

In a group, the ionization energy

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Increase

Decreases

Remain constant

First increases then decreases

What is wrong about transition metals?

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Diamagnetic

Paramagnetic

Form complexes

Shows variable oxidation state

Polyanion formation is maximum in

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Nitrogen

Oxygen

Sulphur

Boron

A nucleoside may be

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Ribonuleoside

Deoxyribonucleoside

Both a and b

None

Each of the following is true of white and red phosphours except that they

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Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

Potassium hexacyanoferrate (II) has the formula

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K₄[Fe(CN)₆]

K₃[Fe(CN)₆]

K₂[Fe(CN)₆]

K [Fe(CN)₆]

In Antarctica ozone depletion is due to the formation of following compound

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Acrolein

Peroxy acetyl nitrate

SO₂and SO₃

Chlorine nitrate

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