Q. No.Borax bead test is responded by:
1. Divalent metals
2. Heavy metals
3. Light metals
4. Metal which forms coloured metaborates
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Which of the following statements regarding germanium compounds is incorrect?
1. is amphoteric
2. is more stable than
3. is weakly acidic
4. GeCl4 + 2HCl ⇄ H2[GeCl6]
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Tin cry refers to-
1. Conversion of white to grey tin
2. Tin plating
3. Conversion of white tetrahedral tin to white rhombohedral tin
4. Emission of sound while bending a tin rod
The correct statement regarding polymeric silicon dioxide is :
| 1. | Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms. |
| 2. | Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms. |
| 3. | Silicon atom is bonded to two oxygen atoms. |
| 4. | These are double bonds between silicon and oxygen atoms. |
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AlF3 is soluble in HF only in the presence of KF due to the formation of:
| 1. | K3[AlF3H3] | 2. | K3[AlF6] |
| 3. | AlH3 | 4. | K[AlF3H] |
Which of the following correctly describes behavior of Sn²⁺ and Pb⁴⁺?
| 1. | Sn2+ is an oxidizing agent while Pb4+ is a reducing agent. |
| 2. | Sn2+ and Pb2+ both are oxidizing agents. |
| 3. | Sn4+ is a reducing agent while Pb4+ is an oxidizing agent. |
| 4. | Sn2+ is a reducing agent while Pb4+ is an oxidizing agent. |
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Which of the following Group 13 elements cannot form the hexafluoro complex ion [MF₆]³⁻?
| 1. | Ga | 2. | Al |
| 3. | B | 4. | In |
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