| 1 |
Ethyl alcohol on reacting with orthoboric acid form |
- A. Ethyl borate
- B. Boric acid
- C. Boron acetate
- D. Borax
|
| 2 |
Which substances is called chrome yellow. |
- A. Pb3O4
- B. PbO
- C. 2PbCO3.Pb(OH)2
- D. PbCrO4
|
| 3 |
--------------- element forms an ion with charge 3<sup>+</sup> |
- A. Beryllium
- B. Aluminium
- C. Carbon
- D. Silicon
|
| 4 |
Which element among the following belongs to Group IV A of the Periodic table. |
- A. Barium
- B. Iodine
- C. Lead
- D. Oxygen
|
| 5 |
The composition of white lead is |
- A. PbCO3.Ph(OH)2
- B. PbCO3.2Pb(OH)2
- C. 2PbCO3.Pb(OH)2
- D. PbCO3
|
| 6 |
Third abundant element on earth crust is. |
- A. Boron
- B. Oxygen
- C. Aluminium
- D. Silicon
|
| 7 |
Which are correct oxidation states for lead |
- A. +1, +2
- B. +3 , +5
- C. +2 ,+4
- D. +4 only
|
| 8 |
------------- metal is used in the Thermite process because of its reactivity |
- A. Tron
- B. Copper
- C. Aluminium
- D. Zinc
|
| 9 |
Aluminium is used for making petrol and milk storage tanks because it is |
- A. Conductor
- B. Non magnetic
- C. Excellent reflected
- D. Corrosion resistant
|
| 10 |
The chief of aluminum is |
- A. Na<sub>3</sub>AlF<sub>6</sub>
- B. Al<sub>2</sub>O<sub>3</sub>.2H<sub>2</sub>O
- C. Al<sub>2</sub>O<sub>3</sub>
- D. Al<sub>2</sub>O<sub>3</sub>.H<sub>2</sub>O
|