Advertisements
Advertisements
प्रश्न
State the method used for collecting the following gas:
Oxygen – a gas slightly soluble in water.
Advertisements
उत्तर
The method used for collecting oxygen gas is the downward displacement of water. In this method, the gas jar is filled with water and inverted over the beehive shelf, so that the water is displaced downwards and oxygen is collected upwards.
संबंधित प्रश्न
___________ deals with the study of matter and the changes it undergoes.
Write True or False against the following statement.
Enzymes secreted by our body are chemicals:
Match the following scientists in column A with their discoveries or contributions in column B.
| Column A | Column B | ||
| (a) | Marie Curie | (i) | Safety Lamp |
| (b) | John dalton | (ii) | Helium |
| (c) | William Ramsey | (iii) | Nobel Prize Winner (two times) |
| (d) | Sir Humphry Davy | (iv) | Atomic Theory |
State the function of
The wooden handle at the end of the test tube holder.
Give a comparative difference between soaps and detergents. Give a reason. why detergents have an advantage over soap.
Select the correct name from the choices given below for the following case.
A synthetic fiber used in clothing.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A glass apparatus resistant to chemicals, made of pyrex, and used for heating specific liquids.
Select the correct apparatus from A, B, or C for the following functions of the apparatus given.
A glass apparatus that measures liquid by sucking the liquid at one end up to the marked level and later pouring it out.
Give reasons for the following
Alchemy was considered a pseudoscience.
A philosopher’s stone is not exactly a stone.
