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प्रश्न
State two important uses of following metal
Uses of aluminium
State two uses of aluminium.
उत्तर १
Uses of aluminium :
- Aluminium foils are used for packing food stuff, medicines etc.
- It is used for making high voltage electric transmission wires.
उत्तर २
Uses of aluminium:
- It is used for making pots, pans and parts of automobiles.
- It is used to make electrical wires.
संबंधित प्रश्न
Fill in the blanks:
Metals react with acids to produce _________ gas.
What is a thermite reaction? Explain with the help of an equation. State one use of this reaction.
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.
What is an alloy? Give two examples of alloys.
Mention two uses of the following metals and non-metals
Iodine
A metal which is neither ductile nor malleable is
State two important uses of following metal
Uses of magnesium
Give the general characteristics of:
Alkali metals,
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Write name.
The device used for grinding an ore.
Match the alloys given in column I to the uses given in column II :
| Column I | Column II |
| (i) Duralumin | A. Electrical fuse |
| (ii) Solder | B. Surgical instruments |
| (iii) Brass | C. Aircraft body |
| (iv) Stainless Steel | D. Decorative articles |
Name the following:
The most reactive halogen.
Soft metal : Na : : hard metal : _______
Halogen reacts with acid.
Higher Order Thinking Skills.
Aakash noticed that the metal latch on gate was difficult to open during hot sunny days. However, it was not difficult to open the same latch at night. Aakash observed that the latch and the gate are exposed to the sun during day time.
- Formulate a hypothesis based on the information provided.
- Briefly state how you would test the hypothesis.
Assertion: Mercury is solid in room temperature.
Reason: Mercury is a non-metal.
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
Name two soft metals which can be cut with a knife.
Name two major non-metals which are present in fertilisers and enhance the growth of plants.
X [2, 8, 7] and Y [2, 8, 2] are two elements. Using this information, complete the following:
______ is the metallic element.
