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?

<p>Hydrogen gas (D)</p> Signup and view all the answers

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

<p>Hydrogen gas (B)</p> Signup and view all the answers

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

<p>Have the teacher's assistance (B)</p> Signup and view all the answers

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

<p>$H_2$ gas (B)</p> Signup and view all the answers

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

<p>Gas (D)</p> Signup and view all the answers

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

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

What causes effervescence in solutions when metals react with acids?

<p>Gas bubbles escape from the solution. (D)</p> Signup and view all the answers

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