Question

1)Name the gas evolved when sodium hydrogen carbonate is added to sulphuric acid
a) oxygen
b) carbon dioxide
c) Hydrogen

2) In neutral solution the formula would be
a) H30+<OH-
b) H30+=OH-
c) H30+>OH-

3)A solution reacts with crushed egg shells to give a gas that turns lime water milky the solution contains
a) sodium chloride
b) calcium chloride
c)hydrochloric acid

4)What happens when a solution of an acid is mixed with a solution of base in a test tube?
a)the temperature increases
b) the temperature decreases
c) remains same

Please help me in these MCQs
Who gives me all the correct options I will mark them as Brainlist
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Answer 1

Answer:

1 --> carbon dioxide

2 --> H3O+=OH-

3 --> calcium chloride

4 --> the temperature increases

Explanation:

I hope my answers are correct. Please mark me brainliest