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प्रश्न
Mention two uses of the following metals and non-metals
Gold
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उत्तर
It is used for making ornaments and coins.
It is used in the manufacture of electronic devices like computers, telephones, home appliances, etc.
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संबंधित प्रश्न
Which of the following alloys contains mercury as one of the constituents?
(a) stainless steel
(b) solder
(c) duralumin
(d) zinc amalgam
Fill in the blank spaces by choosing the correct words from the given list.
List: amalgam, chlorine, gallium, sodium chloride, silver chloride
A solution of a metal in mercury is called ________
Statements given below are incorrect. Write the correct statements :
Aluminium is best conductor of electricity.
State two important uses of following metal.
Uses of copper
Give the general characteristics of:
Alkali metals,
(i) bonding
(ii) action of air
(iii) action of water
(iv) action of acid
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
Why is hydrogen placed with alkali metals?
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.
State the position of the following in the periodic table:
Halogens
With reference to the following metals state their use in daily life metal:
Silver
Name the following:
The most reactive halogen.
Name the following:
A metal used in packaging.
Name the following:
A halogen which is a solid at room temperature.
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 the name.
Two highly reactive metals-
An element which is always lustrous, malleable and ductile is ______.
An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.
Metals are usually solids or gases at room temperature.
Which of the following is not a metal?
