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प्रश्न
State one use of Nitrogen.
उत्तर
Nitrogen, due to its inertness, is used to preserve food material.
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संबंधित प्रश्न
State five uses of non-metals.
Name two metals whose melting points are so low that they melt when held in the hand.
Give reasons
Impure diamond is used to cut glass
Match the statements in Column A, with those in Column B .
| Column A | Column B | ||
| 1 | A metal used for making high quality mirrors . | a | Chlorine |
| 2 | A metal which neither malleable nor ductile. | b | Graphite |
| 3 | A non-metal,used in the sterilsation of water. | c | Iodine |
| 4 | A non-metal, whose deficiency can lead to disease like goitre. | d | Silver |
| 5 | A non -metal which can be used as dry lubricant. | e | Zinc |
Name:
a non metal which can form a positive ion
Give the common name and chemical name of an ore of:
(a) zinc (b) aluminium (c) iron.
Complete the statement given below, by filling in the blank with the correct word:
A non-metal which allows an electric current to pass through it ______.
Distinguish between:
Metals - Nonmetals (physical characteristics)
Non-metals are non-malleable.
Match the following:
| 1. | Non-metals | a. | Silicon |
| 2. | Metals | b. | fire extinguisher |
| 3. | Metalloids | c. | dull and soft |
| 4. | Oxygen | d. | hard and shiny |
| 5. | Water | e. | supports fire |
