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Occurence of Sulphuric Acid

Name the foll...

Question

Name the following:
(a) a green coloured carbonate.
(b) a steel grey coloured solid non-metal.
(c) a nitrate which has no water of crystallization.
(d) a sulphate insoluble in water.

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Solution

Disclaimer: There are more than one compounds with the given description. Any one of the following compounds can be used to answer this question.

(a) Nickel carbonate, Copper carbonate
(b) Iodine
(c) Ammonium nitrate, lithium nitrate, sodium nitrate, potassium nitrate etc.
(d) Barium sulphate, lead sulphate, silver sulphate, mercury sulphate etc.

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Q. Name the following:
(a) a non-metal present in steel
(b) a metal which reacts vigorously with cold water
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(d) a metal stored in oil
(e) a metal that becomes black in the presence of hydrogen sulphide
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Q. You have 3 metals and salt solutions of these metals. Test
tube Solution

A	Magnesium sulphate
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C	Ferrous sulphate

HINT: (Magnesium sulphate -white colour, copper sulphate -blue colour, Ferrous sulphate- green colour )
When you were away, your younger brother added a metal in a blue coloured solution to make it green. Which of the following could have happened?

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Q. Aqueous solutions of zinc sulphate and iron sulphate were taken in the test tubes I and II by four students. A, B, C and D. Metal pieces of iron and zinc were dropped in the two solutions and observations made after several hours and recorded in the form of a table as given below:

Observation by	Metal	Solution	Colour change of solution	Deposit/Residue obtained
A	Fe	ZnSO₄	turned green	silvery grey coating
A	Zn	FeSO₄	no change	no change
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D	Fe	ZnSO₄	no change	grey residue
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The correct reporting has been made observations reported by the student :
(1) A
(2) B
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