Advertisements
Advertisements
प्रश्न
Study the extract of the Periodic Table given below and answer the questions that follow. Give the alphabet corresponding to the element in question. DO NOT repeat an element. 
Which non-metallic element has the valency of 2?
उत्तर
Non-metallic element valency of 2 -‘E’.
APPEARS IN
संबंधित प्रश्न
Which has the maximum metallic character Na, Li or K?
Choose the correct answer.
An alkaline earth metal
(i) Lead
(ii) potassium
(iii) calcium
(iv) Copper
Mg2+, Cu2+, Na1+, H1+ (In the order of preferential discharge at the cathode)
Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The element at the bottom of a group would be expected to show ______ metallic character than the element at the top.
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.
Arrange the following elements in order of their decreasing metallic character.
Na, Si, Cl, Mg, Al
Write the name.
The atom having the smallest atomic radius from zero group.
On moving down the group metallic character increases.
An element has atomic number 17. To which group, the period does it belong? It is metal or non-metal?
Choose the odd one out and write the reason:
