The Fundamental Unit of Life — Science STD 9 — Question

On a hot summer day, speed of sound was recorded at Chennai and Delhi as v_c and v_d. Then:

The speed of a moving object is determined to be 0.06m/s. This speed is equal to:

Which of these is a multicellular organism?

The sound waves travel fastest:

1. In solids.
2. In liquids.
3. In gases.
4. In vacuum.

One of the following is an exception to the cell theory.

The compound plants composed of algae and fungi are called:

1. Algae.
2. Bryophytes.
3. Pteridophytes.
4. Lichens.

Moon is revolving in a circular orbit with a uniform velocity V0​. If the gravitational force suddenly disappears, the moon will

Which of the following is not a mixture?

Find out the correct sentence about manure.

1. Manure contains large quantities of organic matter and small quantities of nutrients.
2. It increases the water holding capacity of sandy soil.
3. It helps in draining out of excess of water from clayey soil.
4. Its excessive use pollutes environment because it is made of animal excretory waste.

1. (i) and (iii)
2. (i) and (iii)
3. (ii) and (iii)
4. (iii) and (iv)

An element X' has valency equal to 3. What will be its formula with carbonate ion?