Question # 1

Which of the following belongs to the halogen family?

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Francium

Polonium

Radium

Astatine

Phosphide ion has the electronic structure similar to that of

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Nitride ion

Fluoride ion

Sodium ion

Chloride ion

Which of the following has linear shape?

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SP

SP²

SP³

None of the above

Detergents are

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Synthetic products

Natural products

Both A and B

None of the above

The ratio of the ionization energy of H and Be³⁺ is

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1 : 1

1 : 3

1 : 9

1 : 16

If the solvent is inflammable for heating purpose we use

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Ice bath

Water bath

Wire gauze

Thermostat

Gooch crucible is used for the filtration of precipitates having

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High solubility

High concentration

High ignition temperature

Low temperature

Which inorganic precipitate acts as semipermeable membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

Number of elements presents in the fifth period of periodic table is

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8

10

18

32

Vital force theory was rejected by

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Berzelius

Kolbe

Wholer

Lavoiser

Which of the following is acidic?

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SO₃

N₂O

BeO

HgO

Gooch Crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

Minamata disease is due to pollution of

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Organic waste

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

Which has maximum protein content?

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Ground nut

Cow milk

Egg

Wheat

Water (H_2O) is liquid while hydrogen sulphide (H₂S) is a gas because

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphure has high electronegativity than oxygen

Water molecules associate through hydrogen

Sodium thisoulphate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behavior

Among the alkaline earth metals the element forming predominantly covalent compounds is

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Be

Mg

Sr

Calcium

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

SO₂ and NO₂produce pollution by increasing

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Alkalinity

Acidity

Neutrality

Buffer action

Which of the following oxides is peroxide?

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Na₂O₂

MnO₂

BaO

SO₂

Which of the following metal exhibits more than one oxidation?

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Na

Mg

Fe

Al

In which molecule carbon atom is sp²hybridized

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CH₄

C2H₄

C₂H₂

None of the above

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