Chemistry
The substance which leaves a black residue on heating is :
- Zinc carbonate
- Copper nitrate
- Lead carbonate
- Ammonium dichromate.
Related Questions
A gas which can act as an oxidizing as well as reducing agent:
- CO
- NO2
- SO2
- H2S
Isotopes differ in number of :
- Electrons
- Protons
- Neutrons
- Positive charge
Name the gas evolved in each of the following cases:
(i) Copper carbonate is heated strongly
(ii) Lead nitrate is heated
(iii) Nitrogen combines with hydrogen
(iv) Copper sulphate is heated strongly
(v) Addition of sodium to cold water
What do you observe when :
(i) Ammonium chloride crystals are heated in a test tube ?
(ii) Iron nails are added to copper sulphate solution ?
(iii) Lead nitrate crystals are heated strongly?
(iv) Silver nitrate solution is mixed with sodium chloride solution?
(v) Blue copper sulphate crystals are heated ?