| 1 |
Litharge is chemically |
- A. PbO
- B. PbO2
- C. Pb3O4
- D. Pb(CH3COO)2
|
| 2 |
Which substance is water repellant and used in ceramic insulators. |
- A. Asbestos
- B. Lead compounds
- C. Silicon carbide
- D. silicones
|
| 3 |
Boron usually exist in nature as |
- A. Borides
- B. Oxborates
- C. Free element
- D. It is a artificial element
|
| 4 |
Which is used in the leather industry |
- A. Borax
- B. Boric acid
- C. Boric oxide
- D. Tetra Boric acid
|
| 5 |
Which element among the following belongs to Group IV A of the Periodic table. |
- A. Barium
- B. Iodine
- C. Lead
- D. Oxygen
|
| 6 |
Aluminium is used for making petrol and milk storage tanks because it is |
- A. Conductor
- B. Non magnetic
- C. Excellent reflected
- D. Corrosion resistant
|
| 7 |
The composition of white lead is |
- A. PbCO3.Ph(OH)2
- B. PbCO3.2Pb(OH)2
- C. 2PbCO3.Pb(OH)2
- D. PbCO3
|
| 8 |
silicones are |
- A. Some salts of sodium
- B. Allotropes of SI
- C. Inorganic polymers
- D. Coloured compounds of Si
|
| 9 |
Aluminium oxide is. |
- A. Acidic oxide
- B. Basic oxide
- C. Amphoteric oxide
- D. None of these
|
| 10 |
Aluminum reacts with nitrogen to form |
- A. AIN
- B. Al<sub>2</sub>N
- C. Al<sub>2</sub>N<sub>3</sub>
- D. Al<sub>4</sub>N<sub>6</sub>
|