Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride. This is a:
Which of the following pairs will give a displacement reaction?
2AgNO3 + Cu → Cu (NO3)2 + 2Ag
Consider the reactions CUSO4 + Fe → FeSO4 + Cu
FeSO4 + Zn → ZnSO4 + Fe
Metals present on top of the other metal in the activity series can displace the metal at the bottom from its salt solution. So zinc is present at the top of the iron and can displace iron from its sulphate solution.
Which among the following is a double displacement?
Rahul took some zinc granules in a test tube and added dilute HCl to it. He observed that the colour of zinc granules changed to
When a solution of barium chloride in water is added to an aqueous solution of sodium sulphate, the following happens :
On keeping iron nails in copper sulphate solution for two hours, the colour of solution changes
Iron sulphate crystals on heating show the evolution of gas which
Four students were asked to study the reaction between aqueous solutions of barium chloride and sodium sulphate. On mixing the solutions of the two salts in a test tube, they reported their experiment as follows:
(i) The colour of the mixture becomes brown
(ii) The solutions form a separate layer
(iii) a colourless mixture is obtained.
(iv) a white substance settles at the bottom.
The correct report is
White ppt of BaSO4 settles at the bottom.
A small amount of quick lime is taken in a beaker. Water is added slowly to the beaker. Which of the following were noted?
Products obtained as a result of double displacement reaction using BaCl2 and Na2SO4 are:
Astha added quick lime to water and observed that heat is produced. The kind of this reaction is:
On heating crystals of ferrous sulphate, products obtained are:
In which form zinc metal is used from the laboratory to prepare hydrogen?
Hydrogen is prepared in the lab by the action of acids on metals dilute. Sulphuric acid is added to granulated zinc. Zinc sulphate or zinc chloride is formed in solution and the hydrogen that is evolved is collected over water in a trough.
Which of the following solutions is coloured?
Aqueous solution of which of the following is colourless?
A student placed a Zn rod in the FeSO4 solution. After 10 hours when the rod was taken out and it was observed that:
Aradhita added zinc granules in iron sulphate solution, and made a few observations. Identify the incorrect observation.
(i) Pale green solution becomes colourless.
(ii) Black deposit seen on zinc granules.
(iii) Red deposit seen on zinc granules.
(iv) Colourless solution becomes pale green.
Sapna added a strip of aluminium to 50 mL of a solution of FeSO4 in a test tube. The correct observation for change in colour of solution made by her is:
The reaction :
Fe2O3 + 2Al → Al2O3 + 2Fe is an example of
In the chemical reaction Fe2O3 + 2Al → Al2O3 + 2Fe
The above reaction is known as displacement reaction iron oxide reacts with aluminium to form aluminium oxide and iron metal.