Question

......solve it according to 3 marks.​

Answer 1

Answer:

1] bubbles of calcium are formed when calcium reacts with water.

2] nitric acid acts as an oxidising agent. it gives hydrogen only when it reacts with maganese or magnesium metal.

3] fe+h2o=fe203+h2

Explanation:

pls mark it brainliest.

Answer 2

Answer:

heyy mate here is ur ans .➨

a)

➨ Calcium floats on water because the bubbles of hydrogen gas formed by the reaction of calcium with water stick to the surface of metal.

b)

➨ Hydrogen gas is not evolved when a metal reacts with nitric acid. It is because HNO3 is a strong oxidising agent. It oxidises the H2 produced to water and itself gets reduced to any of the nitrogen oxides (N2O, NO, NO2).

c)

➨ 3Fe+4H2O⟶Fe3O4+4H2(g)

The compound of iron obtained-----

iron(II,III)  oxide [FeO+Fe2O3] and H2 gas.

hope u will get ans.❤❤❤

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