Advertisements
Advertisements
प्रश्न
Mention two uses of the following metals and non-metals
Oxygen
Advertisements
उत्तर
It is used by all living beings for breathing.
It is important for combustion.
APPEARS IN
संबंधित प्रश्न
State one use of the following metal:
Gold
Explain how, a reduction reaction of aluminium can be used for welding cracked machine parts of iron. Write a chemical equation for the reaction involved.
Mention two uses of the following metals and non-metals
Iodine
Statements given below are incorrect. Write the correct statements :
Bronze is a mixture of 10% copper, 80% zinc and 10% tin.
State two important uses of following metal:
Uses of silver
State two important uses of following metals:
Uses of iron
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Hydrochloric acid,
Write name.
The oxide that forms salt and water by reacting with both acid and base.
Write scientific reason.
Sodium is always kept in kerosene.
Name the following:
A metal used in packaging.
The minerals from which the metal can be separated economically are called _______.
Match the columns.
| Group A | Group B |
| 1) Copper and Zinc | a) Brass |
| 2) Copper and Tin | b) Bronze |
| c) Stainless steel |
Halogen reacts with acid.
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
Which of the following property is generally not shown by metals?
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.
- ______ is a metal.
- Metals are good ______ of electricity.
Metals are ______ conductors of heat and electricity.
Match the following
| i. | Silica | a. | Caustic potash |
| ii. | Potassium hydroxide | b. | Sand |
| iii. | Sodium hydroxide | c. | Calamine |
| iv. | Zinc carbonate | d. | Caustic soda |
