| 1 |
Litharge is chemically |
- A. PbO
- B. PbO2
- C. Pb3O4
- D. Pb(CH3COO)2
|
| 2 |
Which are correct oxidation states for lead |
- A. +1, +2
- B. +3 , +5
- C. +2 ,+4
- D. +4 only
|
| 3 |
Which one of the following elements exhibits s-inert pair effect. |
|
| 4 |
Kaolin is a mineral of |
- A. Carbon
- B. Magnesium
- C. Silicon
- D. Aluminium
|
| 5 |
Which is not used of Borax |
- A. Softening of water
- B. As medicine for washing eyes
- C. As flux in metallurgical operations
- D. To make quartz
|
| 6 |
Which of the following elements is not present abundantly in earth's crust |
- A. Silicon
- B. Aluminium
- C. Sodium
- D. Oxygen
|
| 7 |
A solution of borax in water is. |
- A. Acidic
- B. Alkaline
- C. Neutral
- D. None of these
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| 8 |
Boric acid is used as eye wash due to its |
- A. Weakly acidic property
- B. Antiseptic nature
- C. Antibiotic nature
- D. Weakly basic properties
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| 9 |
Which element form an ion with charge +3 |
- A. Beryllium
- B. Aluminum
- C. Carbon
- D. Sillicon
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| 10 |
Aluminium is used for making petrol and milk storage tanks because it is |
- A. Conductor
- B. Non magnetic
- C. Excellent reflected
- D. Corrosion resistant
|