| 1 |
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>
|
| 2 |
Which is used in the leather industry |
- A. Borax
- B. Boric acid
- C. Boric oxide
- D. Tetra Boric acid
|
| 3 |
Tincal is a mineral of |
|
| 4 |
Aluminium oxide is |
- A. Acidic oxide
- B. Baric oxide
- C. Amphoteric oxide
- D. None of these
|
| 5 |
Which element forms on ion wiht charge 3+ |
- A. Beryllium
- B. Aluminium
- C. Carbon
- D. silicon
|
| 6 |
Kaolin is a mineral of |
- A. Carbon
- B. Magnesium
- C. Silicon
- D. Aluminium
|
| 7 |
Boron usually exist in nature as |
- A. Borides
- B. Oxborates
- C. Free element
- D. It is a artificial element
|
| 8 |
Boric acid cannot be used |
- A. As antiseptic in medicine
- B. For washing eyes
- C. In soda bottles
- D. For Enamals and Glazes
|
| 9 |
Which substances is called chrome yellow. |
- A. Pb3O4
- B. PbO
- C. 2PbCO3.Pb(OH)2
- D. PbCrO4
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| 10 |
Which one of the followings is not ore of aluminium |
- A. Coruridum
- B. Bauxite
- C. Colemanite
- D. Kaolin
|