Question

A- Niprogen
2.27 A non-metal A which is the largest constituent of air, when heated with H2 in 1:3 ratio in the presence of
catalyst (Fe) gives a gas B. On heating with
O2 it gives an oxide C. If this oxide is passed into water in the
presence of air it gives an acid D which acts as a strong oxidizing agent
Identify A, B, C and D.
D- HNO₃
B- Ammonia
C - 29003 NO2
R.28 What is galvanized iron? How is iron galvanized? What is the advantage of galvanized iron? How does
galvanized iron get its name? State its two uses.
Galvanized iron is iron which is protected from susting by
zinc coating on ito Fron is galvanized by zinc coating on
it. The galvanized iron is protected against rusting even
is the
the zinc coati
coating is broken. By electroplating y zinc iron
Q.29 Metal
compound A reacts with dilute hydrochloric acid and to produce effervescence. The gas evolved
extinguishers a burning candle and turns the limewater milky. Write balanced chemical equations for the
reactions.
Na CO₂ + 2Hot NaCl₂ + H₂O +co,
со,1
6.30 Give reasons for the following observations:
(i) Ionic compounds in general have high melting and boiling points
Considerable
inter Tonic attraction.
(ii) Highly reactive metals cannot be obtained from their oxides by heating them with carbon.
because strongersinnabeet of energy is required to break the
(iii) Copper vessels get a green coat when left exposed to air in the rainy season.
Because
of corrosion
0.31 Give reasons for the following:
(1) Metals are regarded as electropositive elements.
metals are regarded as electropooltive elements be
they always loose elections
(ii) When
a piece of copper metal is added to a solution of zinc sulphate no change takes place,
color of copper sulphate fades away when a piece of zinc is placed in its solution.
(111) Articles made of Aluminium do not corrode even though Aluminium is an active metal.
aluminium exposed to air it develope​

Answer 1

Answer:

Yes

Explanation:

HJjahsgsyuxuxjckckjnzj