General configuration of outermost and penultimate shell is If n = 4 and x = 5, then the number of proton in the nucleus will be:
Given n = 4x = 5
Total electron = 2 + 6 + 5 + 2 = 15
Electron in 1 + 2 orbit = 2 + 8 = 10
Total electron = 10 + 15 = 25
Number of electron = Number of proton
So total proton = 25
Which of the following is paramagnetic?
Elements or ions containing unpaired electrons are paramagnetic.
Because have 2 unpaired electrons in 3d subshell; therefore it is paramagnetic.
Potassium permanganate acts as an oxidant in neutral, alkaline as well as acidic media. The final products obtained from it in the three conditions are,
In neutral medium:
In alkaline medium:
In acidic medium:
Copper displaces which of the metal from their salt solutions?
- All of these
As it is clear that reduction potential of copper is more than Zn and Fe. Hence, it is unable to displace them from their salts.
In which of these processes platinum is used as a catalyst?
- Oxidation of ammonia to form
- Hardening of oils
- Production of synthetic rubber
- Synthesis of methanol
Platinum acts as catalyst in the oxidation of ammonia to form nitric oxide. This reaction is used in the Ostwaldâ€™s method of nitric acid preparation.