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Combined State

cu forms two ...

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cu forms two oxides cuprous and cupric o xide which law can be proved by the weights of cu and o

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Q. Phosphorus forms two oxides

P_{2} O_{3}

P_{2} O_{5}

. Which law can be proved by the weights of

P

O ?

Q. Assertion :Cuprous ion (Cu

^{+}

) is colourless whereas cupric ion (Cu

^{2 +}

) produces blue colour in solution. Reason: Cuprous ion (Cu

^{+}

) has unpaired electrons while cupric ion (Cu

^{2 +}

Q. What weight of copper will be deposited by passing

2

faradays of electricity through a cupric salt?(Atomic weight of

C u = 63.5 g / m o l

)

Q. A certain sample of cuprous sulphide is found to have the composition

C u_{192} S_{100}

because of incorporation of

C u^{2 +}

C u^{+}

ions in the crystal then ratio of

C u^{2 +}

C u^{+}

Q. A certain sample of cuprous sulphide is found to have the composition

C u_{1.95} S_{1.00}

because of incorporation of

C u^{2 +}

C u^{+}

ions in the crystal then ratio of

C u^{2 +}

C u^{+}

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