| 1 |
Ortho boric acid on strong beating gives. |
- A. Borax
- B. Boron oxide
- C. Metaboric acid
- D. Tetraboric acid
|
| 2 |
Which one of the followings is not ore of aluminium |
- A. Coruridum
- B. Bauxite
- C. Colemanite
- D. Kaolin
|
| 3 |
Tincal is a mineral of. |
|
| 4 |
Litharge is chemically |
- A. PbO
- B. PbO2
- C. Pb3O4
- D. Pb(CH3COO)2
|
| 5 |
--------------- element forms an ion with charge 3<sup>+</sup> |
- A. Beryllium
- B. Aluminium
- C. Carbon
- D. Silicon
|
| 6 |
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>
|
| 7 |
Which one of the following compounds of lead is red in colour |
- A. PbO
- B. Pb2O
- C. Pb3O4
- D. PbCO3
|
| 8 |
Which one of following is used in cosmetics |
- A. Talc
- B. Asbestos
- C. Sodium sulphate
- D. Aluminium Sulphate
|
| 9 |
Which of the following elements is not present abundantly in earth's crust |
- A. Silicon
- B. Aluminium
- C. Sodium
- D. Oxygen
|
| 10 |
In which substance silicon is not present. |
- A. Talc
- B. Asbestos
- C. Dolomite
- D. Zirocon
|
