Question # 1

Which acid is present in our stomach.

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Nitric acid

Hydrochloric acid

Sulphuric acid

All of these

__________ acid cause acidity of stomach.

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Oxalic acid

Hydrochloric acid

Sulphuric acid

Nitric Acid

The meaning of latin word acidus is.

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Sweet

Tasteless

Salty

Sour

The base which is used in alkaline batteries is.

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NaOH

Al(OH)₂

KOH

Mg(OH)₂

The water of crystallization is responsible for the.

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Melting points of crystals

Boiling points of crystals

Shapes of crystals

Transition point of crystals

When acid react with carbonates and bicarbonates which gas is evolved?

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H2

CO₂

Cl₂

N₂

Soda lime is a mixture of..

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CaCl, + KOH

NaOH + CaO

NaOH + CaCl₂

Ca(OH)₂ + CaO

The colour of litmus paper in strong acidic solution.

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Red

Blue

Yellow

Colourless

Acids turn

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Blue litmus red

Red litmus blue

Blue litmus green

Blue litmus blue

Arrhenius presented his concept about acids and bases in.

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1785

1787

1923

1930

Which acid is used for etching glass?

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HF

HCl

HBr

HI

Methyl orange produces which colour in basic solution

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Red

Yellow

Pink

White

Who proved that the presence of hydrogen as the main constituent of all acids.

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Lavoisier

Humphrey Davy

Dalton

Arrhenius

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