Download App

Is Matter Around Us Pure ? — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceIs Matter Around Us Pure ?1 Mark
Question
Tyndall effect can be observed in a colloidal solution. Consider light scattering in the following:
  1. When sunlight passes through the canopy of a dense forest.
  2. When normal light passes through copper sulphate solution.
  3. When normal light passes through milk.
  4. When a fine beam of light enters a room through a small hole.
Tyndall effect is observed in:
✓

Answer

  1. I, III and IV
Explanation:
Tyndall effect refers to the process by which light is scattered by colloids or suspension making the path of the light to be visible. 
In the forests, the air contains mists which acts as the colloids hence when light seeps in through the canopy one clear sees its path.

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. [1 M]" from Is Matter Around Us Pure ?→Is Matter Around Us Pure ? — all question types→Science STD 9 question papers→Rajasthan Board STD 9 question papers→Rajasthan Board question paper generator→

Similar questions

Who laid the foundation of chemical sciences by experimentally establishing laws of chemical combination along with other scientists:
→
Elements having valency ‘one’ are:
→
What was the source of alpha particles in Rutherford scattering experiment?
→
Cell arises from pre-existing cell was stated by:
→
Name the sounds of the frequencies given below 10Hz.
→
The value of gravitational constant depends upon: 
→
According to the law of conservation of energy:
→
According to the third law of motion, action and reaction:
  1. Always act on the same body but in opposite directions.
  2. Always act on different bodies in opposite directions.
  3. Have same magnitudes and directions.
  4. Act on either body at normal to each other.
→
During evaporation of liquid,  ___________?
→
Area under a v – t graph represents a physical quantity which has the unit:
→