| 1 |
Which of the following elements is not present abundantly in earth's crust |
- A. Silicon
- B. Aluminium
- C. Sodium
- D. Oxygen
|
| 2 |
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
|
| 3 |
The shape of SiO2 IS |
- A. Tetrahedral
- B. Trigonal bipyramid
- C. Linear
- D. Cubic
|
| 4 |
Which substances is called chrome yellow. |
- A. Pb3O4
- B. PbO
- C. 2PbCO3.Pb(OH)2
- D. PbCrO4
|
| 5 |
Aluminium oxide is. |
- A. Acidic oxide
- B. Basic oxide
- C. Amphoteric oxide
- D. None of these
|
| 6 |
Boric acid can not be used. |
- A. As antiseptic in medicine
- B. For washing eyes
- C. In soda bottle
- D. For enamels and glazes
|
| 7 |
Tincal is a mineral of. |
|
| 8 |
Which is used in the leather industry |
- A. Borax
- B. Boric acid
- C. Boric oxide
- D. Tetra Boric acid
|
| 9 |
Which substance is water repellant and used in ceramic insulators. |
- A. Asbestos
- B. Lead compounds
- C. Silicon carbide
- D. silicones
|
| 10 |
Chemical composition of colemanite is |
- A. Ca<sub>2</sub>B<sub>6</sub>O<sub>11</sub>. 5H<sub>2</sub>O
- B. CaB<sub>4</sub>O<sub>7</sub>. 4H<sub>2</sub>O
- C. Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>.4H<sub>2</sub>O
- D. CaNaB<sub>5</sub>O<sub>9</sub>. 8H<sub>2</sub>O
|