51. Which of the following are amongst the few carbon-containing compounds not classified as organic?
52. Match List-I with List-II and select the correct answer:
List-I
List-II
a. Butadiene
1. Match industry
b. Lead tetraethyl
2. Dye industry
c. Phosphorus
3. Rubber industry
d. Aniline
4. Petroleum
| List-I | List-II |
| a. Butadiene | 1. Match industry |
| b. Lead tetraethyl | 2. Dye industry |
| c. Phosphorus | 3. Rubber industry |
| d. Aniline | 4. Petroleum |
53. Which of the following is not the allotrope of carbon?
54. Assertion (A) BHC is also called gammexane or 666.
Reason (R) BHC is prepared by the reaction of benzene with Cl2 in the presence of light.
Reason (R) BHC is prepared by the reaction of benzene with Cl2 in the presence of light.
55. An organic compound is used in making picric acid (explosive), phenolphthalein (an indicator), bakelite, salol, aspirin, salicylic acid etc. The organic compound is
56. All members of a homogeneous series can be represented by the same general formula. Choose the wrong formula from the following.
Alkane - CnH2n + 2
Alkyne - CnH2n + 1
Alkine - CnH2n - 2
Alkane - CnH2n + 2
Alkyne - CnH2n + 1
Alkine - CnH2n - 2
57. COOH is present in which of the following functional groups?
58. How many hydrogen atoms are present in a molecule of ethanol?
59. Which gas is used in hot air balloons?
60. Which of the following element is always present in organic compounds?
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