What happens when zinc granules are added to dilute nitric acid and sodium hydroxide?

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Solution

a) Zinc reacts with very dil. HNO₃ (6%) and is oxidised to Zn(NO₃)₂ and nitric acid is reduced to ammonium nitrate(NH₄NO₃).

Reaction : 4Zn + 10HNO₃ (very dilute ) -----> 4Zn(NO₃)₂ + NH₄NO₃ + 3H₂O

Zn(NO₃)₂- Zinc nitrate

b) When zinc granules are added to sodium hydroxide, formation of sodium zincate takes place. Evolution of hydrogen gas is observed.
Chemical reaction:
2Zn + NaOH →Na₂ZnO₂ + H₂ ↑

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When zinc granules are added to dilute hydrochloric acid .what is happening around zinc granules? Is there any change in temperature?

Name the gas evolved when zinc granules are treated/ heated with :

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H_{2} S O_{4}

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