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प्रश्न
A metal which is neither ductile nor malleable is
पर्याय
Copper
Silver
Zinc
Aluminium
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उत्तर
Zinc
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संबंधित प्रश्न
What happens when Dilute sulphuric acid is poured on a copper plate?
Write word equations of the reactions involved.
Give a reason for Alkali metals are good reducing agents.
What is an amalgam?
How does the electrical conductivity of copper alloys, brass and bronze, differ from that of pure copper?
What is an alloy? Give two examples of alloys.
Give reasons
Graphite is used in the leads of pencils
State two important uses of following metal:
Uses of aluminium
State the position of the following in the periodic table:
Aluminium
Why are alkali metals kept in kerosene oil?
Write name.
Alloy of sodium with mercury.
Write name.
The reagent that dissolves noble metals.
Write scientific reason.
Generally the ionic compounds have high melting points.
With reference to the following metals state their use in daily life metal:
Silver
Give a reason why a green deposit is seen on the surface of an article of copper
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white crystalline solid which decrepitates on heating leaving a residue which fuses with the glass and evolves two gases one of which is coloured and acidic.
Write scientific reason.
Meena’s mother uses lemon or tamarind for cleaning copper vessels turned greenish.
Which of the following two combinations are correct?
| Metal | Gas Evolved | |
| (i) | Copper | Yes |
| (ii) | Iron | Yes |
| (iii) | Magnesium | No |
| (iv) | Zinc | Yes |
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
- Na
- Ca
- Fe
- Cu
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
