Assertion (A): | ICl is more reactive than I₂. |
Reason (R): | I-Cl bond is weaker than I-I bond. |
1. | (A) is False but (R) is True. |
2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
4. | (A) is True but (R) is False. |
Given below are two statements:
Assertion (A): | Fluorine exhibits only –1 oxidation state whereas other halogens exhibit + 1, + 3, + 5 and + 7 oxidation states. |
Reason (R): | Other halogens have d orbitals and therefore, can expand their octets and show +1, +3, +5 and +7 oxidation states also. |
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. |
Given below are two statements:
Assertion (A): | Although electron gain enthalpy of fluorine is less negative as compared to chlorine, fluorine is a stronger oxidising agent than chlorine. |
Reason (R): | F2 has low enthalpy of dissociation and F– has high hydration enthalpy |
The correct option is-
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): | The atomic size of F is smaller than that of Cl. |
Reason (R): | F-F bond is stronger than the Cl-Cl bond. |
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): | NaCl reacts with concentrated H2SO4 to give colourless fumes with a pungent smell. But on adding MnO2, the fumes become greenish-yellow. |
Reason (R): | MnO2 oxidizes HCl to chlorine gas which is greenish-yellow. |
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): | HI cannot be prepared by the reaction of KI with concentrated H2SO4. |
Reason (R): | HI has the lowest H—X bond strength among halogen acids. |
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. |
Statement I: | Acid strength increases in the order given as HF < HCl < HBr < HI. |
Statement II: | As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCI, HBr, and HI decreases and so the acid strength increases. |
1. | Statement I is correct and Statement II is incorrect | |
2. |
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3. | Both Statement I and Statement II are correct. | |
4. | Both Statement I and Statement II are incorrect. |
Which of the following statements are correct?
a. | Among halogens, the radius ratio between iodine and fluorine is maximum. |
b. | Leaving F — F bond, all halogens have weaker X — X bond than X — X' bond in interhalogens. |
c. | Among interhalogen compounds a maximum number of atoms are present in iodine fluoride. |
d. | Interhalogen compounds are more reactive than halogen compounds. |
1. (a, b, c)
2. (b, c, d)
3. (a, c, d)
4. (a, b, d)
With respect to halogens, four statements are given below
(I) The bond dissociation energies for halogens are in the order:
(II) The only oxidation state is —1
(III) The amount of energy required for the excitation of electrons to the first excited state decreases progressively as we move from F to l
(IV) They form species in their aqueous solutions (X = halogen)
The correct statements are
1. I, II, IV
2. I, III, IV
3. II, III, IV
4. I, III
Match the substance given in Column I with the application given in Column II and mark the appropriate option:
Column I (Substance) | Column II (Application) | ||
A. | Liquid helium | (i) | Chlorinating agent |
B. | Argon | (ii) | Inert atmosphere (metallurgy) |
C. | PCl5 | (iii) | Cryogenics |
D. | P4O10 | (iv) | Dehydrating agent |
A | B | C | D | |
1. | (iii) | (ii) | (i) | (iv) |
2. | (iii) | (iv) | (i) | (ii) |
3. | (ii) | (iii) | (i) | (iv) |
4. | (ii) | (iv) | (i) | (iii) |