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. |
The correct reaction(s) among the following options is/are -
1.
2.
3.
4. All of the above
Carbon dioxide is a gas but silica is a solid because:
1. Carbon dioxide is composed of discrete covalent molecules whereas silica has a continuous tetrahedral structure.
2. molecules are lighter than molecules.
3. is more acidic than .
4. The melting point of silica is very high.
Identify the correct statements among the following:
a. is used as a refrigerant for ice-cream and frozen food.
b. The structure of contains twelve six-carbon rings and twenty five-carbon rings.
c. ZSM-5, a type of zeolite, is used to convert alcohol into gasoline.
d. CO is a colourless and odourless gas
1. (a) and (c) only
2. (b) and (c) only
3. (c) and (d) only
4. (a), (b) and (c) only
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 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. |