Download App

Is Matter Around Us Pure — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure1 Mark
MCQ
Naphthalene can be separated for sand:
  • A
    By sublimation.
  • B
    By distillation.
  • C
    By crystallisation.
  • D
    By using water as solvent.
✓

Answer

  1. By sublimation.

Explanation:

Naphthalene sublimes on heating, whereas sand does not. So, when the mixture is heated, solid naphthalene turns into vapours, which can be condensed. Sand remains in the container.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q-[Che-1M]" from Is Matter Around Us Pure→Is Matter Around Us Pure — all question types→Science STD 9 question papers→CBSE Board STD 9 question papers→CBSE Board question paper generator→

Similar questions

Which one of the following statements is incorrect:
→
The element having atomicity ‘four’ is most likely to be:
→
The atom as a whole is electrically neutral", is a statement proposed by which atomic model:
→
The formula unit mass of Ca3​(PO4​)2​ is :
→
A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is:
→
The correct electronic configuration of a chloride ion is:
→
4g of CH4 and 8g of O2 contain:
→
The atomic number of an element X is 8 and that of element Y is 4. Both these elements can exhibit a valency of:
  1. 1
  2. 2
  3. 3
  4. 4
→
The formula of the sulphate of an element X is X2(SO4)3. The formula of nitride of element X will be:
→
Which of the following best describes the methods to separate a mixture of two miscible liquids and two immiscible liquids​ respectively:
→