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प्रश्न
Mg2+, Cu2+, Na1+, H1+ (In the order of preferential discharge at the cathode)
उत्तर
Na+ < Mg+2 < H+ < Cu+2
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संबंधित प्रश्न
Complete the following sentences
Moving across a ………….. of the periodic table the elements show increasing ………………..character (group, period, metallic, non-metallic).
Write scientific reason.
Metallic character goes on decreasing while going from left to right in a period.
Within a group, where would you expect to find the element with the greatest metallic character.
Use the information given in (a) to (h) to identify the substances P to W selecting your answers from the given list.
List:
| Calcium | Oxygen | Copper (II) Oxide |
| Carbon | Calcium hydroxide | Copper (II) Nitrate |
| Lead (II) Oxide | Hydrogen chloride | Chlorine |
| Lead (II) Nitrate | Calcium Oxide | Ammonium chloride |
- P is white solid. When heated produces white fumes (sublime).
- P and R on warming produce an alkaline gas.
- On adding water to T, heat is evolved and R is formed.
- Q burns brightly in the air to form T.
- When S is heated, it gives off brown fumes and leaves a black residue of U.
- A solution of S is formed by warming U with dilute nitric acid.
- V is a gaseous non-metallic element that reacts with hydrogen to form W.
- A solution of W will neutralize the solution of R.
The tendency of an element to form cation is the _______ character of that element.
Write the name.
Two elements having two orbits.
On moving down the group metallic character increases.
Write scientific reason.
The metallic character of elements increases while going down the groups.
Write scientific reason.
The non-metallic character increases while going from left to right in a period.
Metals are good ______ because they are electron ______.
