In which of the following representations given below spatial arrangement of group/atom is different from that given in structure 'A'?
a. | b. | ||
c. | |
d. |
Choose the correct option
1. (a, b, c)
2. (b, c, d)
3. (c, d, a)
4. (a, d, b)
Electrophiles are electron-seeking species. Which of the following groups contain only electrophiles?
(a) \(\mathrm {BF_3, NH_3, H_2O} \)
(b) \(\mathrm {AlCl_3, SO_3 , NO_2^+} \)
(c) \(\mathrm {NO_2^+ , CH_3^+, CH_3-C^+\text=O} \)
(d) \(\mathrm {C_2H_5^-,H_3C -\dot{C}H_2,C_2H_5^+} \)
Choose the correct option:
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Consider the following four compounds.
(I). | |
(II). | |
(III). | |
(IV). |
Which of the following pairs are position isomers?
1. I and II
2. II and III
3. II and IV
4. III and IV
Consider the following four compounds.
I. | |
II. | |
III. | |
IV. |
Consider the following pairs of compounds.
(a) II and III
(b) II and IV
(c) I and IV
(d) I and II
Choose the pairs given above that are not functional group isomers:
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
A nucleophile is a species that should have
(a) A pair of electrons to donate
(b) Positive charge
(c) Negative charge
(d) Electron-deficient species
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Hyperconjugation involves delocalization of -
a. | Electrons of carbon-hydrogen bond of an alkyl group directly attached to an atom of unsaturated system. |
b. | Electrons of carbon-hydrogen bond of alkyl group directly attached to the positively charged carbon atom. |
c. | -electrons of carbon-carbon bond |
d. | Lone pair of electrons. |
Choose the correct option :
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Two of the following compounds contain all the carbon atoms in the same hybridisation state.
(a)
(b)
(c)
(d)
Choose the correct option:
1. a, b
2. b, c
3. c, d
4. a, d
Arrange the following carbanions in order of their decreasing stability:
A. \(\mathrm{H}_3 \mathrm{C}-\mathrm{C} \equiv \mathrm{C}^{-}\)
B. \(\mathrm{H}-\mathrm{C} \equiv \mathrm{C}^{-}\)
C. \(\mathrm{H}_3 \mathrm{C}-\mathrm{{C}H_2^-}\)
1. | A > B > C | 2. | B > A > C |
3. | C > B > A | 4. | C > A > B |
Given below are two statements:
Assertion (A): | Components of a mixture of red and blue inks can be separated by distributing the components between stationary and mobile phases in paper chromatography. |
Reason (R): | The colored components of inks migrate at different rates because paper selectively retains different components according to the difference in their partition between the two phases. |
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. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
Assertion (A): | Sulphur present in an organic compound can be estimated quantitatively by the Carius method. |
Reason (R): | Sulphur is separated easily from other atoms in the molecule and gets precipitated as a light yellow solid. |
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. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |