Atoms and Molecules — Science STD 9 — Question

Which vitamins occur in abundance in fish liver oil?

Which is the only constituent of xylem that is living?

Mention the crop whose production has increased by blue revolution and yellow revolution.

A coverslip must always be places very gently while mounting in order to:

1. Avoid the entry of air bubbles.
2. Stop the stain from oozing out.
3. Avoid crushing of the material.
4. Stop the material from drying.

Write the names of any two popular varieties of marine (salt water) fish.

In the following Questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:

1. Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
2. The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
3. Assertion is true but the Reason is false.
4. The statement of the Assertion is false but the Reason is true.

Assertion: Medicine are easily absorbed by our body in colloidal form.
Reason: It is because they have large surface area and therefore, absorbed easily.

Define the tissues.

What is the common name of solid carbon dioxide?

Which separation technique will you apply for separating the following mixtures:

1. Butter from curd.
2. Different pigments from extracts of flower petals.