Class-7,Acids Bases and Salts

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Q1) Acid turns blue litmus *

1 point

Red

Orange

green

Pink

Q2) Which of the following is a strong acid? *

1 point

Citric acid

Malic acid

Sulphuric acid

Acetic acid

Q3) Which gas is released when acid reacts with metal? *

1 point

Nitrogen

Oxygen

Hydrogen gas

Carbon dioxide

Q4) Which one is an organic acid? *

1 point

Nitric acid

Lactic acid

Hydrochloric acid

Sulphuric acid

Q5) Which one of the following is a natural indicator *

1 point

Phenolphthalein

Methyl orange

Oxalic acid.

Turmeric

Q6) Product of a neutralisation reaction are always *

1 point

an acid and a salt

a salt and water

a salt and a base

an acid and a base

Q7) In case of indigestion, we use *

1 point

Antipyretic

Antibiotic

Antacids

Alcohols

Q8) All acids contain *

1 point

Oxygen

Hydrogen

Nitrogen

Carbon

Q9) Reaction between acids and base to form salt and water is called *

1 point

Addition reaction

Decomposition reaction

Neutralization reaction

Combination reaction

Q10) What is the common name of sodium carbonate? *

1 point

Blue vitriol

Phenol

Caustic soda

Baking soda

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