Question

3)Assertion (A): milk and starch solution will show tyndall effect.

Reason ®:because this both contain colloidal particles which cannot be seen with naked eye but big

enough to scatter a beam of light (1)​

Answer 1

Answer:

true

reason- false

Explanation:

because collidal solution particles are large enough to be seen with naked eyes and reflect light

Answer 2

Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

• Milk and starch solution has particles dispersed throughout the dispersion medium. These particles are not visible to the naked eye but are big enough to scatter a beam of light. Hence, both milk and starch will show the Tyndall effect as particles don't settle at the bottom. The given Assertion is true.
• Colloidal particles lie in the range of 1-1000nm. Hence, both milk and starch are big enough to scatter light and will show the Tyndall effect.
• Hence, Both Assertion and Reason are true and Reason is the correct explanation of Assertion.