Advertisements
Advertisements
प्रश्न
Give the name and formulae of two acidic oxides.
उत्तर
Carbon dioxide with the formula CO2 and sulphur dioxide with the formula SO2 are two acidic oxides.
APPEARS IN
संबंधित प्रश्न
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 |
Write a balanced chemical equation for the reaction of zinc with potassium hydroxide solution.
Name two metals which react violently with cold water. Write any three observations you would make when such a metal is dropped into water.
State one use of Carbon (as Graphite).
The electronic configurations of three elements A, B and C are as follows:
A | 2, 8, 1 |
B | 2, 8, 7 |
C | 2, 4 |
(a) Which of these element is a metal?
(b) Which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which two elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?
`Mg -— → Mg^(2+)`
Explain the term Gangue .
Name the following:
or
With reference to the physical properties of metals and non-metals, state the following exception.
A metal which is liquid at room temperature.
Gold and silver are used to make jewellery. Give reason
With reference to the physical properties of metals and non-metals, state the following exception.
A non-metal which has low tensile strength