Tissues — Science STD 9 — Question

One small crystal of potassium permanganate can colour large volume of water. This proves that ____________:

Why do we weight less on moon as compared to earth ?

Two elements X and Y have valencies of 5 and 3, and 3 and 2, respectively. The elements X and Y are most likely to be respectively:

What is G

An object of mass 2kg is sliding with a constant velocity of 4m/s on a frictionless horizontal table. The force required to keep this object moving with the same velocity is:

Contractile proteins are found in:

Harelip is a:

1. Acquired disease.
2. Infectious disease.
3. Metabolic disease.
4. Congenital disease.

Which among the following is a wrong differentiation between mass and weight ?

An ionic compound will be formed by the combination of one of the following pairs of elements. This pair of elements is:

1. Chlorine and calcium.
2. Calcium and sodium.
3. Sulphur and carbon.
4. Chlorine and chlorine.

A particle P has 18 electrons, 20 neutrons and 19 protons. This particle must be:

1. A molecule.
2. A binary compound.
3. An anion.
4. A cation.