Home
Class 10
CHEMISTRY
On heating blue coloured powder of coppe...

On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (Black), oxygen gas and a brown gas X is formed
(a) Write a balanced chemical equation of the reaction.
(b) Identify the brown gas X evolved.
(c) Identify the type of reaction.
(d) What could be the pH range of aqueous solution of the gas X ?

Text Solution

Verified by Experts

`(a) underset(underset("nitrate")("Copper"))(2Cu(NO_(3))_(2))overset("Heat")to underset(underset(underset("(black)")("oxide"))("Copper"))(2CuO)underset("Oxygen")(O_(2))+underset(underset(underset(underset("(X)")("(brown)"))("dioxide"))("Nitrogen"))(4NO_(2))`
(b) X is nitrogen dioxide gas `(NO_(2))`.
(c) This is a thermal decomposition reaction.
(d) The aqueous solution of the gas is acidic because it is an oxide of a non-metal, so its pH range would be in between 1 to 7 .
Promotional Banner

Similar Questions

Explore conceptually related problems

Write the balanced chemical equation for each of the following reactions: The gas produced by the action of dilute nitric acid on copper.

When hydrogen gas is passed over heated copper (II) oxide, copper and steam are formed. Write the balanced chemical equation for this reaction and state (i) the substance oxidized and (ii) the substance reduced in the reaction.

Write a balanced equaiton when copper reacts with nitric acid, a brown gas is fromed and the solution turns blue.

When a substance 'X' was heated with slaked lime, a gas 'Y' with a pungent smell was formed. The gas y gave pink colouration to phenolphthalein. Write a balanced chemical equation for the reaction.

A gas X is formed when a substance Y is heated with concentrated sulphuric acid. The gas X turns wet blue litmus paper red and gives dense white fumes with ammonia. Write balanced chemical equation for the reaction between gas X and ammonia.

When potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed. (a) What is the colour of this precipitate? Name the compound precipitated. (b) Write the balanced chemical equation for this rection. (c) List two types of reactions in which this reaction can be placed.

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.

A metal X ,which is used in thermit process , when heated with oxygen gives an oxide Y which is amphoteric in nature . Identify X and Y. Write balanced chemical equation of the reaction of oxide Y with hydrochloric acid and sodium hydroxide .

A student perfomed the experiment of heating ferrous sulphate crystals in a boiling tube. He smelt fumes of a pungent gas and saw colours of ferrous sulphate disappear. (i) Write the chemical formula of the pungent gas. (ii) Why does the colour of crystal disappear ? (iii) Identify the nature of this chemical reaction.

2g of lead nitrate powder is taken in a boiling tube. The boiling tube is heated over a flame. Now answer the following (a) State the colour of the fumes evolved and the residue left. (b) Name the type of chemical reaction that takes place stating its balanced chemical equation.