Question

heat
+
CaCO3(s)
CaOs) + CO2g)
21. Write a balanced equation for a chemical reaction that can be characterised as precipita
Ans.
heat
BaCl2(aq) + Na2SO4 (aq) → BaSO4(s) + 2 NaCl (aq)
(White ppt.)
22. Name the law which is kept in mind while balancing a chemical equation,
Ans. The law is known as the law of Conservation of Mass.
23. What is meant by thermal decomposition reaction ? Explain with an example.
Ans. A chemical reaction in which a substance decomposes upon heating to form new sub
the thermal decomposition reaction. For example,
CaCO3(s) + CaO(s) + CO2g)
24.
X + Y SO4 → X SO4 + Y
Y+X SO4 → No reaction
Of the two elements X' and 'Y' which is more reactive and why?
Ans. X'is more reactive than Y since it has displaced 'Y' in the displacement reaction.
25. Write a complete balanced chemical equation for the following reaction :
Sodium hydroxide + Sulphuric acid ->
ns.
2NaOH + H2SO4 → Na2SO4 + 2H20.
powder becomes coated with bla
+
of​

Answer 1

Answer:

shivam i actually have 2 questions for you -

1)are you here to make gfs?really lol man

2) why have you posted this question when you already know what the answer is?

Explanation:

;)

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