1. | H2Te | 2. | H2Se |
3. | H2O | 4. | H2S |
P forms multiple bonds in POCl3 by using
1.
2.
3.
4. None of the above.
Which of the following statements about phosphorus is false?
1. It is non-metal.
2. It exists as a tetrahedral molecular solid.
3. It is less reactive than nitrogen.
4. P-P bond is much weaker than bond.
The basicity of the acids H3PO2, H3PO3, H3PO4 and H4P2O7 are, respectively:
1. 1 , 2 , 3 , 7
2. 2 , 3 , 4 , 7
3. 1 , 2 , 3 , 4
4. 1 , 2 , 3 , 5
Which of the following acids is the strongest?
1. H3PO2
2. H3PO3
3. H4P2O7
4. H3PO4
The element that does not form pentoxide is:
1. As
2. Sb
3. Bi
4. P
The compound among the following with the lowest pKa value is?
1. H2O
2. H2S
3. H2Se
4. H2Te
The oxide of a non-metal possesses the following characteristics:
i. | It is both a proton donor and a proton acceptor. |
ii. | It is a poor conductor of electricity. |
iii. | It reacts readily with basic and acidic oxides. |
iv. | It oxidises Fe at boiling point. |
The formula for oxide is:
1. H2O
2. CO2
3. H2O2
4. NO
Which of the following hydrides is the least poisonous?
1.
2.
3.
4.
Among the following hydrides that has the lowest boiling point is:
1.
2.
3.
4.