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प्रश्न
Name the following:
The chemical compound responsible for the green deposit on the surface of articles of copper.
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उत्तर
Copper carbonate (CuCO3)
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संबंधित प्रश्न
State one use of Silver.
The atomic number of an element X is 12.
(a) What must an atom of X do to attain the nearest inert gas electron configuration?
(b) Which inert gas is nearest to X?
Name an alloy of lead and tin.
Fill in the following blank with suitable word:
The electrical conductivity and melting point of an alloy is ........... than that of pure metals.
Give reasons
Gold is mixed with copper and nickel.
Tick (√) the most appropriate answer.
Graphite is used :
State two important uses of following metal:
Uses of gold
State two important uses of following metal.
Uses of copper
State two important uses of following metal:
Uses of zinc
State the position of the following in the periodic table:
Iron and zinc
Which is the non-ionic compound in the compounds given below.
AgNO3 + Nacl → AgCl + NaNO3
With reference to the following metals state their use in daily life metal:
copper
Name the following:
The most reactive halogen.
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.
Complete the following flowchart.
Why are bells made of metals?
A is a reddish-brown metal, which combines with O2 at < 1370 K gives B, a black coloured compound. At a temperature > 1370 K, A gives C which is red in colour. Find A, B, and C with reaction.
The ability of metals to be drawn into thin wire is known as
Give an example of a metal which
- is liquid at room temperature.
- is the best conductor of heat.
A doctor prescribed a tablet to a patient suffering from iron deficiency. The tablet does not look like iron. Explain.
