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Reaction of Acids and Bases with Metals

Cold, dilute ...

Question

Cold, dilute nitric acid reacts with copper to form _____ (hydrogen, nitrogen dioxide, nitric oxide).

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Solution

The reaction is as follows:
$4 H N O_{3} + C u \to C u (N O_{3})_{2} + 2 N O_{2} + 2 H_{2} O$
Hence, nitrogen dioxide is formed.

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Q. Fill in the blanks using the appropriate words given below :
(Sulphur dioxide, Nitrogen dioxide, Nitric oxide, Sulphuric acid)
(i) Cold, dilute nitric acid reacts with copper to give ____________.
(ii) Hot, concentrated nitric acid reacts with copper to form ____________.

Q. Write balanced equations and name the products formed when:
(a) Sodium hydrogen carbonate is added to nitric acid
(b) cupric oxide reacts with nitric acid
(c) zinc reacts with dilute nitric acid
(d) concentrated nitric acid is heated

A non-metal X reacts with concentrated nitric acid to form carbon dioxide, water and nitrogen dioxide. What is X?

Q. Write balanced equation and name the products formed when:
(a) sodium hydrogencarbonate is added to nitric acid.
(b) cupric oxide reacts with nitric acid.
(c) zinc reacts with dilute nitric acid.
(d) concentrated nitric acid is heated.

Oxides of nitrogen react with water to form acids. Hence, the statement "Nitrogen dioxide reacts with water to form nitric acid." is true.

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