The correct statement among the following regarding behavior of in water is -
1. | BCI 3 readily undergoes hydrolysis while CCI 4 completely resists hydrolysis. |
2. | CCI 4 readily undergoes hydrolysis while BCI 3 completely resists hydrolysis. |
3. | Both BCI 3 and CCI 4 readily undergo hydrolysis. |
4. | Neither BCI 3 nor CCI 4 undergo hydrolysis. |
The hybridization of carbon in (a) (b) diamond (c) graphite is respectively-
1. , ,
2. , ,
3. , ,
4. , ,
CO is a poisonous gas because :
1. | It forms a complex with hemoglobin. |
2. | The CO–Hb complex is about 300 times more stable than the O 2 –Hb complex. |
3. | It can kill a person through suffocation on not receiving oxygen. |
4. | All of the above. |
An excessive content of CO2 is responsible for global warming as:
1. | Higher the level of carbon dioxide, higher is the amount of heat trapped. |
2. | Higher the level of oxygen, higher is the amount of heat trapped. |
3. | Higher the level of carbon dioxide, lesser is the amount of heat trapped. |
4. | Higher the level of oxygen, lesser is the amount of heat trapped. |
When a metal X is treated with sodium hydroxide, a white precipitate (A) is obtained, which is soluble in excess of NaOH to give soluble complex (B). Compound (A) is soluble in dilute HCl and forms compound (C). The compound (A) when heated strongly gives (D), which is used to extract the metal.
X, C & D are respectively :
1. | Aluminium, aluminium chloride, alumina |
2. | Aluminium, aluminium hydroxide, aluminium chloride |
3. | Aluminium hydroxide, aluminium chloride, aluminium |
4. | Aluminium hydroxide, aluminium chloride, sodium tetrahydroxoaluminate |
Thermodynamically the most stable form of carbon is-
1. | Diamond | 2. | Graphite |
3. | Fullerenes | 4. | Coal |
The incorrect statement among the given options is :
1. | CO2 can be prepared by the action of dilute hydrochloric acid on calcium carbonate. |
2. | CO is prepared by the dehydration of formic acid with conc. H2SO4. |
3. | CO2 is commercially prepared by passing steam over hot coke. |
4. | CO is commercially prepared by passing steam over hot coke. |
The correct reaction(s) among the following options is/are -
1.
2.
3.
4. All of the above