Question

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Answer 1

Explanation:

1)If the iron nails are dipped into the sulphuric acid solution the displacement of the H2 by Fe takes place as H2SO4 reduces and Fe oxidises due to that there will be rusting type of formation on the layer of the iron nail and H2 gas is released

2)When the strong drops of in the marble floor the vinegar acts like HCl acid it starts to erode the marble floor by release of the H2 gas.

8)i)We observe that there was an evolution of the carbon dioxide gas from the beaker.

ii)As we know vinegar is acidic and baking soda is basic the reaction takes place resulted in formation of the basic nature.

iii)CH3COOH+NAHCO3→CH3COONA+H2O+CO2

iv)strong acid + strong base →salt+water+carbon dioxide