Question # 1

Which of one the following is Lewis base?

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BF3

H+

NH3

Ag+

Malic acid founds in:

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Apple

Fats

Rancid Butter

Oranges

Acetic acid is used for:

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Elching designs

Clearing metals

Flavouring food

Making explosives

Which acid used for food preservation?

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H₂SO₄

HNO₃

HCl

CH₃COOH

Word "acid" derived from:

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Urdu

English

Latin

Greek

Acids turn

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Blue litmus red

Red litmus blue

Blue litmus green

Blue litmus blue

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

Dilute acid react with carbonates the produce product except _________

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Salt

Water

Carbon di oxide

Hydrogen gases

Jabir Bin Haiyan prepared.

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Nitric Acid

Hydrochloric acid

Sulphueric Acid

All of these

When acid reacts with sulphites and Bi sulphates which gas is evolved?

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H2

CO₂

SO₂

NH₃

Methyl orange produces which colour in basic solution

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Red

Yellow

Pink

White

pH of neutral solution is always.

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6

5

7

10

The product of any Lewis acid-base reaction is a single specie called:

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free radical

adduct

molecular ion

conjugate

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