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.
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
Saloni took a piece of burning charcoal and collected the gas evolved in a test tube.
(a) How will she find the nature of the gas?
(b) Write down word equations of all the reactions taking place in this process.
State one use of Gold.
Write ‘true’ or ‘false’ for the following statement :
Silver is used to make electric cables.
Write ‘true’ or ‘false’ for the following statement.
Iodine acts as an antiseptic in the form of a tincture of iodine.
Why is hydrogen placed with alkali metals?
Write name.
Alloy of sodium with mercury.
With reference to the following metals state their use in daily life metal:
iron
The minerals from which the metal can be separated economically are called _______.
Generally, metals are solid in nature. Which one of the following metals is found in a liquid state at room temperature?
All gases are ______.
