Question # 1

1 mole of CH₄ contains

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6.02 x 10²³ atoms of H

4 g-atom of hydrogen

1.81 x 1023 molecules of CH₄

3.0 g of carbon

Which of the following with aqueous KOH will give acetaldehyde?

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1,2-Dichloroethane

1, 1-Dichloroethane

Chloroacetic acid

Ethyl chloride

Potassium crystallizes with a

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Orthogonal lattice

Cubic lattice

Triclinic

Ortho rhombic lattice

Which of the following statements is most appropriate about effective nuclear charge? It depends upon

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The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding constant

Cyclone collector is used for minimizing

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Radioactive pollution

Air pollution

Noise pollution

Water pollution

For the carbylamine reaction we need hot alc.KOH and

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Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

Which has the largest radius?

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CO³⁺

Mn³⁺

Fe³⁺

Cr³⁺

Which of the following compounds has the lowest anion to cation size ratio?

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LiF

NaF

CsI

CsF

Which one is not usually used for the crystallization

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Acetone

Acetic acid

Sulphuric acid

Chloroform

Causticisation process is used for the preparation of

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Caustic soda

Caustic potash

Baryata solution

Slaked lime

Ozone is not

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An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

SO₂ and NO₂produce pollution by increasing

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Alkalinity

Acidity

Neutrality

Buffer action

At room temperature formaldehyde is

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Gas

Liquid

Solid

None of the above

The acid used in lead storage cells is

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Phosphoric acid

Nitric acid

Sulphuric acid

Hydrochloric acid

Which of the following belongs to the halogen family?

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Francium

Polonium

Radium

Astatine

Propyne on hydrolysis is presence of H₂SO₄and HgSO_{4 gives}

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Acetaldehyde

Acetone

Formaldehyde

None

The last orbit of argon would have electrons

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8

18

2

6

Which of the following statements is most appropriate about effective nuclear charge? It depends upon

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The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

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

Salol is prepared from

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Salicyclic acid and phenol

Salicyclic acid and methyl alcohol.

Both

None

The following has zero valency

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Na

Be

Al

Kr

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