Question

give me answer for this questions

Answer 1

3) When Hydrochloric acid is mixed with Nitric acid in the ratio of 3:1 the solution formed is called aqua regia .

2)The bat uses ultra sound waves ,hits the object ,comes back and the bat is able to hear the sound and make its way through.

5)H₂+CuO=Cu+H₂O

It is a redox reaction

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