Gravitation — Science STD 9 — Question

A cell placed in solution swells up. The solution is:

1. Hypertonic
2. Isotonic
3. Hypotonic
4. Both a and b

In desert plants, rate of water loss gets reduced due to the presence of:

On the basis of composition of matter, milk is considered to be:

1. A pure substance.
2. An impure substance.
3. An element.
4. A compound.

Which of the following physical quantities is different from others?

Which of the following contribute to green house effect?

1. Methane (CH₄).
2. Carbon dioxide (CO₂).
3. Chlorofluorocarbons (CFCs).
4. All of these.

When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of:

Maximum milk yielding buffalo is:

Which of the following is incorrect pair?

Which of the following is a macronutrient?

What is the distribution of electrons in an oxygen atom: