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Chemistry: Concentrated Acid and Water Mixture

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Chemistry: Concentrated Acid and Water Mixture

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Questions and Answers

What do you observe on the surface of zinc granules when they react with dilute sulphuric acid?

Decrease in temperature

Formation of bubbles

Evolution of a gas (correct)

Discoloration of zinc granules

Why are bubbles formed in the soap solution when the gas evolved from the reaction is passed through it?

The gas is flammable

The gas reacts with the soap

The gas is lighter than air (correct)

The gas is denser than air

What compound is formed when a metal displaces hydrogen atoms from acids?

Acid

Salt (correct)

Oxide

Water

In the reaction between metal and acid, what is produced along with the salt?

Hydrogen gas (D) Signup and view all the answers

What is the product when granulated zinc metal reacts with sodium hydroxide solution?

Hydrogen gas (B) Signup and view all the answers

What safety precaution is specifically mentioned for Activity 2.3 in the text?

Have the teacher's assistance (B) Signup and view all the answers

In the reaction between acids and metals, what type of gas is typically evolved?

$H_2$ gas (B) Signup and view all the answers

What state of matter are formed bubbles typically in, when passing through the soap solution?

Gas (D) Signup and view all the answers

Are all metals equally reactive when they come in contact with acids?

No, metals have different reactivity towards acids. (D) Signup and view all the answers

What causes effervescence in solutions when metals react with acids?

Gas bubbles escape from the solution. (D) Signup and view all the answers