Question # 1

Which acid is used for etching designs on copper plates?

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H₂SO₄

HNO₃

HCl

CH₃COOH

The value of constant of ionic product of water Kw at 25 C.

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1.0 x 10^-4

1.0 x 10¹⁴

1.0 x 10^-4

1.0 x 10⁴

Potassium Ferrocyanide is a:

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Normal salt

Mixed salt

Complex salt

Double salt

Methyl orange produces which colour in basic solution

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Red

Yellow

Pink

White

The colour of litmus paper in strong acidic solution.

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Red

Blue

Yellow

Colourless

Which acid is used for food preservation?

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Hydrochloric acid

Benzoic acid

Sulphuric acid

Nitric acid.

What is the POH of a 0.02 M Ca(OH)₂?

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1.698

1.397

12.31

12.61

Which of following is not amphoteric?

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H₂O

NH₃

HCO₃

SO₄

___________ is not an acid:

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HCl

NH₃

H₂CO₃

H₂SO₄

Which base is more corrosive?

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NH₄OH

NaOH

Ca(OH)₂

AL(OH)₂

Which one gas is liberated when alkalies react with ammonium salts?

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O₂

CO₂

H₂

NH3

Which salt is used as a table salt?

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NaCl

Na₂CO₃

Na₂SiO₃

NaCl

All bases turn red litmus

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Red

Blue

Pink

White

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