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प्रश्न
Statements given below are incorrect. Write the correct statements :
Soda water is prepared by dissolving washing soda in water.
उत्तर
Soda water is prepared by dissolving carbon dioxide in water.
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संबंधित प्रश्न
Which of the following can be beaten into thin sheets?
Give reasons for the following.
Immersion rods for heating liquids are made up of metallic substances.
Match the substances given in Column A with their uses given in Column B.
| A | B | ||
| 1 | Gold | a | Thermometers |
| 2 | Iron | b | Electric wire |
| 3 | Aluminium | c | Wrapping food |
| 4 | Carbon | d | Jewellery |
| 5 | Copper | e | Machinery |
| 6 | Mercury | f | Fuel |
For the electro-refining of copper: Write the reaction that takes place at the anode
Name the most abundant non-metal in the earth's crust.
Name one metal which has a low melting point.
Name the metal which is the poorest conductor of heat.
State any five physical properties of metals.
Define non-metals. Give five examples of non-metals.
Name a non-metal having lustre (shining surface).
Name a metal used as a thermometric liquid
Name one metal which is a liquid at room temperature
Name a metal which is lighter than water :
State two important uses of following non-metal
Uses of oxygen
What is an amalgam? How does an amalgam different from an alloy?
Name:
a metal which is a bad conductor of heat and electricity
Name:
two metallic oxides which are acidic
Name a non-metal which shows reducing property.
From the list of characteristics given below, select the five which are relevant to non-metals and their compounds:
- Ductile
- Conduct electricity
- Brittle
- Acidic Oxides
- Basic Oxides
- Discharged at anode
- Discharged at cathode
- Ionic chlorides
- Covalent chlorides
- Reaction with dilute sulphuric acid yields hydrogen
- 1, 2 or 3 valence electrons
- 5, 6, 7 valence electrons
(Write the five letters corresponding to the correct characteristics).
Distinguish between:
Metals - Nonmetals (physical characteristics)
