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): | SF6 cannot be hydrolysed but SF4 can be. |
Reason (R): | Six F-atoms in SF6 prevent the attack of H2O on sulphur atom of SF6 |
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): | Both rhombic and monoclinic sulphur exist as S8 but oxygen exists as O2. |
Reason (R): | Oxygen forms pπ - pπ multiple bonds due to its small size and small bond length but pπ - pπ bonding is not possible in sulphur. |
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. | Both (A) and (R) are false. |
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. |
Given below are two statements:
Assertion (A): | HNO3 makes iron passive. |
Reason (R): | HNO3 forms a protective layer of ferric nitrate on the surface of the iron. |
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): | N2 is less reactive than P4. |
Reason (R): | Nitrogen has more electron gain enthalpy than phosphorus. |
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. |
Match the species given in Column I with the shape given in Column II and mark the correct option.
Column I | Column II | ||
A. | Its partial hydrolysis does not change the oxidation state of the central atom. | 1. | He |
B. | It is used in modern diving apparatus. | 2. | XeF6 |
C. | It is used to provide an inert atmosphere for filling electrical bulbs. | 3. | XeF4 |
D. | Its central atom is in sp3d2 hybridisation. | 4. | Ar |
Codes
Options: | A | B | C | D |
1. | 1 | 4 | 2 | 3 |
2. | 1 | 2 | 3 | 4 |
3. | 2 | 1 | 4 | 3 |
4. | 1 | 3 | 2 | 4 |
Match the species given in Column I with the shape given in Column II and mark the correct option.
Column I | Column II |
A. SF4 | 1. Tetrahedral |
B. BrF3 | 2. Pyramidal |
C. BrO-3 | 3. Sea-saw shaped |
D. NH4+ | 4. Bent T-shaped |
Codes
A | B | C | D | |
1. | 3 | 2 | 1 | 4 |
2. | 3 | 4 | 2 | 1 |
3. | 1 | 2 | 3 | 4 |
4. | 1 | 4 | 3 | 2 |
Match the items in Columns I and II and mark the correct option.
Column I | Column II |
A. H2SO4 | 1. Highest electron affinity |
B. CCl3NO2 | 2. Chalcogen |
C. Cl2 | 3. Tear gas |
D. Sulphur | 4. Storage batteries |
Codes
A | B | C | D | |
1. | 4 | 3 | 1 | 2 |
2. | 3 | 4 | 1 | 2 |
3. | 4 | 1 | 2 | 3 |
4. | 2 | 1 | 3 | 4 |
Match the formulas of oxides are given in Column I with the type of oxide given in Column II and mark the correct option.
Column I | Column II | ||
A. | Pb3O4 | 1. | Neutral oxide |
B. | N2O | 2. | Acidic oxide |
C. | Mn2O7 | 3. | Basic oxide |
D. | Bi2O3 | 4. | Mixed oxide |
Codes
Options: | A | B | C | D |
1. | 1 | 2 | 3 | 4 |
2. | 4 | 1 | 2 | 3 |
3. | 3 | 2 | 4 | 1 |
4. | 4 | 3 | 1 | 2 |