Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
(A) is a reddish-brown metal – Copper
\[\ce{2Cu + O2 ->[<1370K]\underset{\text{Cupric Oxide (Black)}}{2CuO(B)}}\]
\[\ce{4Cu + O2 ->[>1370K]\underset{\text{Cuprous oxide (Red)}}{2Cu2O(C)}}\]
A – Copper; B – Cupric oxide; C – Cuprous oxide.
APPEARS IN
संबंधित प्रश्न
Give a reason for the following:
Alkali metals are good reducing agents.
State one use of the following metal:
Gold
The atomic number of an element Y is 16.
- What must an atom of Y do to achieve the nearest inert gas electron arrangement?
- Which inert gas is nearest to Y?
What is an amalgam?
Which property of ‘solder’ alloy makes it suitable for welding electrical wires?
Give reasons
Gold is mixed with copper and nickel.
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
State two important uses of following metal
Uses of tin
With reference to the following metals state their use in daily life metal:
Silver
Name the following:
A metal used in flexible pipes.
