Question # 1

Each of 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 is kept in

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Water

Ammonia

Alcohol

Kerosene.

Gooch Crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

Which has maximum protein content?

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Ground nut

Cow milk

Egg

Wheat

Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

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11%

33%

44%

22%

Cyclone collector is used for minimizing

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Radioactive pollution

Air pollution

Noise pollution

Water pollution

In which molecule carbon atom is sp²hybridized

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CH₄

C2H₄

C₂H₂

None of the above

Heating a mixture of sodium benzoate and soda lime gives

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Methane

Benzene

Sodium benzoate

Calcium benzoate

Which of the following is not present in RNA?

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Uracil

Thymine

Ribose

Phosphate

Causticisation process is used for the preparation of

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Caustic soda

Caustic potash

Baryata solution

Slaked lime

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

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It is a weaker acid than acetic

it is a reducing agent

When its calcium salt is heated, it forms a ketone

It is an oxidizing agent

Which one is not usually used for the crystallization?

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Acetone

Acetic acid

Sulphuric acid

Chloroform

The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepare by a chemical reaction form a compound of nitrogen due to the presence of the following in aerial nitrogen.

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Argon

CO₂

Some nitrogen molecules analogous to O2

Greater amount of nitrogen molecules derived from N¹⁵isotope.

Which one of the halogen acid is a liquid?

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HF

HCl

HBr

Hl

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 K2Cr₂O₇ and H₂SO₄

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

The rate of reaction between A and B increases by a factor of 100, and when the concentration with respect to A is increased 10 folds, the order of reaction w.r.t. A is

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10

1

4

2

When a carbon atom forms single bonds with other carbon atoms, these hybird orbitals overlap with the orbitals of hydrogen to form four bonds which are

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Three sigma and one P_i

Two sigma andtwo P_i

One sigma and three P_i

Sigma

An electrolyte

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Forms complex ions in solution

Gives ions only when electricity is passed

Possesses ions even in solid state

Gives ions only when dissolved in water

The number of electrons in the M shell of the element with atomic number 24 is

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24

12

13

8

Maximum number of active hydrogens

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Acetic acid

Glycerol

Methane

Methanol

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