Q. No.Which of the following alkenes on ozonolysis give mixture to give a mixture of ketones only?
a.
CH 3 - CH = CH - CH 3
b.
c.
d.
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Which are the correct IUPAC names of the following compound?
a. 5-Butyl-4-isoporpyldecane
b. 5-Ethyl-4-propyldecane
c. 5-sec-Butyl -4- iso-propyldecane
d. 4-(1-methylethyl) - 5 - (1-methylpropyl)decane
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Which are the IUPAC names of the following compounds?
a. 5-(2',2'-Dimethylpropyl)decane
b. 4-Butyl-2,2-dimethylnonane
c. 2,2-Dimethyl -4- pentyloctane
d. 5-neopentyldecane
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
For an electrophilic substitution reaction, the presence of a halogen atom in the benzene ring:
| A. | Deactivates the ring by inductive effect |
| B. | Deactivates the ring by resonance |
| C. | Increases the charge density at ortho and para position relative to meta position by resonance. |
| D. | Directs the incoming electrophile to meta position by increasing the charge density relative to ortho and para position. |
Choose the correct option
1. (A, B)
2. (B, C)
3. (C, D)
4. (A, C)
In an electrophilic substitution reaction of nitrobenzene, the presence of nitro group:
| (a) | Deactivates the ring by inductive effect. |
| (b) | Activates the ring by inductive effect. |
| (c) | Decreases the charge density at ortho and para position of the ring relative meta position by resonance. |
| (d) | Increases the charge density at meta position relative to the ortho and para positions of the ring by resonance. |
Choose the correct option:
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Correct statement among the following is -
| a. | CH3-O-CH2⊕ is more stable than CH3-CH2⊕ |
| b. | (CH3)2CH⊕ is less stable than CH3-CH2-CH2⊕ |
| c. | CH2=CH-CH2⊕ is more stable than CH3-CH2-CH2⊕ |
| d. | CH2 = CH⊕ is more stable than CH3-CH2⊕ |
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Four structures are given in options (a) to (d). Examine them and select the aromatic structures.
| a. |  |
b. |  |
| c. |  |
d. |  |
Choose the correct option
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, c) |
The molecules having dipole moment are ________
a. 2,2-Dimethylpropane
b. trans-Pent-2-ene
c. cis-Hex-3-ene
d. 2,2,3,3 - Tetramethylbutane
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?
| a. | CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) |
| b. | CH4(g) + O2(g) → C(s) + 2H2O(l) |
| c. | CH4(g) + O2(g) \(\xrightarrow[]{Mo_{2}O_{3}}\) HCHO + H2O |
| d. | 2CH4(g) + O2(g) \(\xrightarrow[]{Cu/523 \ K/ 100 \ atm}\)2CH3OH |
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Given below are two statements:
| Assertion (A): | Among isomeric pentanes, 2,2-dimethylpropane has the highest boiling point. |
| Reason (R): | Branching does not affect the boiling point. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | Both (A) and (R) are false. |
| 4. | (A) is true but (R) is false. |
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