Class XII Chemistry Theory (043) Practice Quiz 2023-24
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Questions and Answers

In the electrolysis of copper(II) sulfate solution using copper electrodes, what is deposited at the cathode?

  • Zinc
  • Copper
  • Oxygen
  • Hydrogen (correct)

Which compound is an aldehyde?

  • Methanoic acid
  • Butanone
  • Propanal (correct)
  • Ethanol

What is the product of the acetylation of salicylic acid in the presence of an acid?

  • Hydrochloric acid
  • Acetic acid
  • Aspirin (correct)
  • Salicylic acid

Which statement about the rate of the reaction is correct?

<p>The rate of the reaction increases with the concentration of the reactant. (D)</p> Signup and view all the answers

Which statement about atomic radii is true?

<p>Atomic radii of 3d &lt; atomic radii of 4d (B)</p> Signup and view all the answers

What do luminous objects do?

<p>Luminous objects give out or emit light of their own.</p> Signup and view all the answers

What is the role of light in seeing objects?

<p>Without light, things cannot be seen. Light helps us see objects.</p> Signup and view all the answers

What is the function of a torch bulb?

<p>The torch bulb is an object that gives out light of its own.</p> Signup and view all the answers

What are some examples of luminous objects?

<p>The Sun and torch bulbs are examples of luminous objects.</p> Signup and view all the answers

How does light enable us to see non-luminous objects?

<p>Light from a luminous object (like the Sun, a torch or an electric light) allows us to see non-luminous objects when it falls on them.</p> Signup and view all the answers

Components of Mapa

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