| 1 |
Lead monoxide is |
- A. Amphoteric
- B. Neutral
- C. Acidid
- D. Basic
|
| 2 |
A solution of borax in water is. |
- A. Acidic
- B. Alkaline
- C. Neutral
- D. None of these
|
| 3 |
The aqueous solution of Borax |
- A. Acidic
- B. alkaline
- C. Amphoteric
- D. manual
|
| 4 |
Which electronic configuration corresponds to an element of group III-A of the Periodic Table |
- A. 1s<sup>2</sup>,2s<sup>2</sup>,2p<sup>6</sup>,3s<sup>2</sup>,3p<sup>1</sup>
- B. 1s<sup>2</sup>,2s<sup>2</sup>,2p<sup>6</sup>,3s<sup>2</sup>,3p<sup>6</sup>,4s<sup>6</sup>
- C. 1s<sup>2</sup>,2s<sup>2</sup>,2p<sup>6</sup>
- D. 1s<sup>2</sup>,2s<sup>2</sup>,3s<sup>2</sup>,3p<sup>3</sup>
|
| 5 |
Which one of the following compounds of lead is red in colour |
- A. PbO
- B. Pb2O
- C. Pb3O4
- D. PbCO3
|
| 6 |
Which one of the followings is not ore of aluminium |
- A. Coruridum
- B. Bauxite
- C. Colemanite
- D. Kaolin
|
| 7 |
Which element forms on ion wiht charge 3+ |
- A. Beryllium
- B. Aluminium
- C. Carbon
- D. silicon
|
| 8 |
Aluminium does not corrode because. |
- A. It is a semi metal
- B. It is a silver shining metal
- C. It does not react with O2
- D. It forms a protective layer of Al2O3
|
| 9 |
Al reacts with caustic soda to form |
- A. Sodium aluminates
- B. Aluminium hydroxide
- C. Aluminium oxide
- D. sodium tetra aluminate
|
| 10 |
Which element among the following belongs to Group IV A of the Periodic table. |
- A. Barium
- B. Iodine
- C. Lead
- D. Oxygen
|