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When concentrated hydrochloric acid (HCl) reacts with manganese dioxide (MnO2), the colour of the filtrate formed is

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Important Questions on Practical Chemistry

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Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide

Identify the salt R from the following observation:

Salt R is black in colour. On reacting with concentrated HCl, it liberates a pungent greenish-yellow gas which turns moist starch iodide paper blue-black.

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Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide

Iron (III) chloride is prepared by passing pure dry chlorine gas over heated iron.

Write the chemical equation for the preparation of chlorine from concentrated hydrochloric acid.

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Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
Give one example of each of the following:
A green solid that decomposes on heating to form carbon dioxide.
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Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
A black coloured solid which on reaction with dilute sulphuric acid forms a blue coloured solution is:
EASY
Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
Among copper oxide and mnganese dioxide only manganese dioxide on heating with concentrated hydrochloric acid gives a greenish yellow gas.
EASY
Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
The colour of the filtrate formed by the reaction of concentrated sulphuric acid with manganese dioxide is _____.
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Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
The colour of the precipitate formed by the reaction of concentrated sulphuric acid with manganese dioxide is pale blue.
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Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
The colour of the filtrate formed by the reaction of concentrated sulphuric acid with manganese dioxide is _____.
MEDIUM
Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
The colour of the precipitate formed by the reaction of concentrated sulphuric acid with manganese dioxide is pale blue.
EASY
Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
Among copper oxide and mnganese dioxide only manganese dioxide on heating with concentrated hydrochloric acid gives a greenish yellow gas.
HARD
Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
How can we distinguish between copper oxide and manganese dioxide? Explain with the help of chemical reactions.
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Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
How can we distinguish between copper oxide and manganese dioxide?
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Science>Chemistry>Practical Chemistry>Identification of Copper Oxide and Manganese Oxide
When conc. hydrochloric acid is added to a black coloured powder, the greenish yellow gas chlorine is evolved. Select the name of the black coloured compound.