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
Mark ‘T’ if the statement is true and ‘F’ if it is false.
Copper displaces zinc from zinc sulphate solution. ( )
Brass is an alloy of copper and ______.
Write ‘True’ or ‘False’ in front of following statement.
Brass is an alloy of copper and zinc and has lustrous yellow colour.
State two important uses of following metal:
Uses of gold
State two important uses of following metal
Uses of mercury
Write scientific reason.
Generally the ionic compounds have high melting points.
State the position of the following in the periodic table:
Halogens
What is it made from? Why?
Ornaments
Name the following:
A metal used in flexible pipes.
Which one of the following metals do not react with cold as well as hot water?
