| 1 |
Which element burns in nitrogen atmosphere to form nitride. |
- A. Mg
- B. Al
- C. Both a and b
- D. None of these
|
| 2 |
Which are correct oxidation states for lead |
- A. +1, +2
- B. +3 , +5
- C. +2 ,+4
- D. +4 only
|
| 3 |
A solution of borax in water is. |
- A. Acidic
- B. Alkaline
- C. Neutral
- D. None of these
|
| 4 |
Which substances is called chrome yellow. |
- A. Pb3O4
- B. PbO
- C. 2PbCO3.Pb(OH)2
- D. PbCrO4
|
| 5 |
Aluminium is used for making petrol and milk storage tanks because it is |
- A. Conductor
- B. Non magnetic
- C. Excellent reflected
- D. Corrosion resistant
|
| 6 |
The shape of SiO2 IS |
- A. Tetrahedral
- B. Trigonal bipyramid
- C. Linear
- D. Cubic
|
| 7 |
Which is used in the leather industry |
- A. Borax
- B. Boric acid
- C. Boric oxide
- D. Tetra Boric acid
|
| 8 |
Aluminium oxide is |
- A. Acidic oxide
- B. Baric oxide
- C. Amphoteric oxide
- D. None of these
|
| 9 |
The composition of white lead is |
- A. PbCO3.Ph(OH)2
- B. PbCO3.2Pb(OH)2
- C. 2PbCO3.Pb(OH)2
- D. PbCO3
|
| 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
|