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प्रश्न
Mention two uses of the following metals and non-metals
Oxygen
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उत्तर
It is used by all living beings for breathing.
It is important for combustion.
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संबंधित प्रश्न
State one use of the following metal:
Mercury
The electrical conductivity and melting point of an alloy is ______ than that of pure metals.
A metal with melting point less than 50°C is
Write ‘True’ or ‘False’ in front of following statement.
Magnesium is used in making light weight alloys of aluminium.
State two important uses of following metal
Uses of magnesium
Give the general characteristics of:
Alkaline earth metals with reference to
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Take an element from an alkali metal and one from an alkaline earth metal and write an equation for their action with:
Oxygen
Write name.
Alloy of sodium with mercury.
Write name.
The nonmetal having electrical conductivity.
Write scientific reason.
Sodium is always kept in kerosene.
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 |
What is it made from? Why?
A pair of tongs.
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Electronic configuration of metal A is 2,8,1. Electronic configuration of metal B is 2,8,8,2. Which of the above metals is more reactive? Explain with reason.
Higher Order Thinking Skills.
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- Formulate a hypothesis based on the information provided.
- Briefly state how you would test the hypothesis.
In the following figure, you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the basis of this fact.
- ______ is a metal.
- Metals are good ______ of electricity.
The liquid metal at room temperature ______.
The typical shine of metals is called ______.
Which metals are liquid at room temperature?
