Matter in Our Surroundings — Science STD 9 — Question

Which of the following cannot be separated from air by the process of fractional distillation?

When a mixture of iron powder and sulphur powder is heated strongly to form iron sulphide, then heat energy is:

1. Released.
2. First absorbed and then released.
3. Absorbed.
4. Neither absorbed nor released.

The given waves have equal:

Ultrasound is of frequency:

The number of valence electrons determines:

Evaporation that occurs directly from the solid phase below the melting point is called as:

The longest cell in the human body is:

1. Nerve cell.
2. Muscle cell.
3. Liver cell.
4. Kidney cell.

Plasma content of blood is:

Which of the following is an example of an object with Kinetic energy?

Animal cell lacking nuclei would also lack in:

1. Chromosome.
2. Ribosome.
3. Lysosome.
4. Endoplasmic reticulum.