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प्रश्न
Statements given below are incorrect. Write the correct statements :
Chlorine gas is used in the manufacture of sulphuric acid.
उत्तर
Chlorine gas is used in the manufacture of hydrochloric acid.
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संबंधित प्रश्न
Some properties are listed in the following Table. Distinguish between metals and non-metals on the basis of these properties
| Properties | Metals | Non-metals |
| 1. Appearance | Lustrous | Dull |
| 2. Hardness | Hard | Soft |
| 3. Malleability | Can be beaten into thin sheets | Cannot be beaten into thin sheets |
| 4. Ductility | Can be drawn into wires | Cannot be drawn into wires |
| 5. Heat Conduction | Good conductors of heat | Poor conductors of heat |
| 6. Conduction of Electricity | Good conductors of electricity | Poor conductors of electricity |
Choose the most appropriate answer of the following:
This is not an alloy of copper:
(A) Brass
(B) Bronze
(C) Solder
(D) Duralumin.
Which property of copper and aluminium makes them suitable for making electric wires?
State one use of Carbon (as Graphite).
Name two metals whose melting points are so low that they melt when held in the hand.
(a) Give the names and formulae of one metal chloride and one non-metal chloride.
(b) State an important property in which these metal chloride and non-metal chloride differ.
(c) Why do they differ in this property?
Name a metal that is brittle
Name a non-metal that is used to kill germs in water
Name the metals present in the following alloys
Stainless steel
Give four differences between metals and non-metals with reference to their:
- Melting point and boiling point
- The conductivity of heat and electricity
- Malleability
- Solubility
Fill in the blank
A chemical compound that makes up the striking heads of match sticks is .........................
Write ‘True’ or ‘False’ in front of following statements.
Non-metals are poor conductors of electricity.
Name a non-metal which is good conductor of electricity.
State two important uses of following non-metals
Uses of nitrogen
Name:
a metal which can be cut with a knife.
Name:
a non metal which is lustrous
Give the balanced reactions for the following:
Red hot iron reacts with steam
Distinguish between a mineral and an ore.
Fill in the Blank and Rewrite the Statements:
Elements showing properties of both metals and nonmetals are known as _________.
