Question # 1

Which of one the following is Lewis base?

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BF3

H+

NH3

Ag+

Which acid is used for etching designs on copper plates?

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H₂SO₄

HNO₃

HCl

CH₃COOH

The reaction between an acid and a base produces.

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Salts and water

Salt and gas

Salt and an acid

Salt and an base

If a liquid has a pH of 7 then it must.

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Be a colourless and odourless liquid

Freeze at 0 ^oC and boil at 100 ^oC

Be natural

Be a solution containing water

Acids turn

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Blue litmus red

Red litmus blue

Blue litmus green

Blue litmus blue

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

Basic solution have pH value.

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Less than 7

Greater than 7

equal to 7

None of these

A product of any Lewis acid base reaction is a single specie called.

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Salt

Water

Adduct

None of these

Lavoisier named binary compounds of oxygen acids in .

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1787

1790

1815

1828

Dilute acids react with carbonates to produce the given products except.

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Salt

Water

Hydrogen

Carbon dioxide

Jabir Bin Haiyan prepared.

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Nitric Acid

Hydrochloric acid

Sulphueric Acid

All of these

Potassium ferrocyanide salt is.

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Normal

complex

Basic

Acidic

Acids have taste

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Bitter

Seetish

Sour

Saltish

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