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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
Fill in the following blanks with suitable words:
A metal having low melting point is ..................... but a non-metal having very high melting point is ..............
State one use of Copper.
What elements are present in steel? How are the properties of steel different from those of pure iron?
A metal with melting point less than 50°C is
State two important uses of following metals:
Uses of iron
State two important uses of following metal
Uses of tin
State the position of the following in the periodic table:
Aluminium
Give the general characteristics of:
Alkali metals,
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
Write scientific reason.
Anodes need to be replaced from time to time during the electrolysis of alumina.
When a copper coin is dipped in silver nitrate solution, a glitter appears on the coin after some time. Why does this happen? Write the chemical equation.
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?
Electric cables
With reference to the following metals state their use in daily life metal:
Zinc
Complete the following flow chart.
Compare the properties of metals and nonmetals. Give three examples for each.
Why are bells made of metals?
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
- Na
- Ca
- Fe
- Cu
Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
Metals have high melting points.
