Advertisements
Advertisements
प्रश्न
State two important uses of following non-metal
Uses of oxygen
उत्तर
Uses of oxygen :
- It is essential for respiration in plants and animals.
- It is essential for combustion of fuels.
APPEARS IN
संबंधित प्रश्न
You are given a hammer, a battery, a bulb, wires and a switch.
- How could you use them to distinguish between samples of metals and non-metals?
- Assess the usefulness of these tests in distinguishing between metals and non-metals.
State why concentrated sulphuric acid is not used for drying ammonia gas
Which property of copper and aluminium makes them suitable for making cooking utensils and boilers?
Name one non-metal which is stored under water.
Name the non-metal which is used to preserve food materials.
Give reasons
Copper is used in making electric cables.
What are metalloids: Give examples.
Name:
a non-metal with high m.p & b.p
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Acidic oxide ………………
Name:
a non metal which can form a positive ion
Explain the term Gangue .
Identify the odd term.
Identify the odd term.
Match the following:
| Column A | Column B |
| (a) Helium | (1) Electric bulb |
| (b) Neon | (2) Thermometer |
| (c) Argon | (3) Semiconductor |
| (d) Germanium | (4) Weather balloons |
| (e) Mercury | (5) Advertising signboards |
Give the common name and chemical name of an ore of:
(a) zinc (b) aluminium (c) iron.
State whether the statement given below is true or false. If false write the correct statement.
Lead pencils contain lead.
State whether the statement given below is true or false. If false write the correct statement.
The chemical name of rust is iron [III] oxide.
Oxygen, hydrogen, and sulphur are examples for
A form of non-metal which has high ductility is
Tabulate the differences between metals and non-metals.
