Q. No.Why is HCl not used to make the medium acidic in oxidation reactions of in acidic medium?
1.
Both HCl and KMnO4 act as oxidising agents
2.
KMnO4 oxidises HCl into Cl2, which is also an oxidising agent
3.
KMnO4 is a weaker oxidising agent than HCl
4.
KMnO4 acts as a reducing agent in the presence of HCl
Match Column I (Catalyst) with Column II (Process), and mark the appropriate option:
| Column I - (Catalyst) | Column II - (Process) | ||
| A. | Ni in the presence of hydrogen | 1. | Contact process |
| B. | Cu2Cl2 | 2. | Vegetable oil to ghee |
| C. | V2O5 | 3. | Sandmeyer reaction |
| D. | Finely divided iron | 4. | Haber's process |
| 5. | Decomposition of KClO3 |
Codes:
| A | B | C | D | |
| 1. | 3 | 4 | 2 | 5 |
| 2. | 2 | 3 | 1 | 4 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
Match the compounds/elements given in Column I with uses given in Column II.
| Column (Compound/element) |
Column II (Use) |
||
| A. | Lanthanoid oxide | 1. | Petroleum cracking |
| B. | Lanthanoid | 2. | Television screen |
| C. | Mischmetal | 3. | Lanthanoid metal + iron |
| D. | Mixed oxides of lanthanoids are employed |
4. | Production of iron alloy |
Codes
| Options: | A | B | C | D |
| 1. | 2 | 1 | 4 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 2 | 4 | 3 | 1 |
| 4. | 4 | 1 | 3 | 2 |
Match the properties given in Column I with uses given in Column II
| Column I-(Property) | Column II-(Metal) | ||
| A. | An element that can show +8 oxidation state | 1. | Mn |
| B | 3d block element that can show up to +7 | 2. | Cr |
| C | 3d block element with the highest melting point | 3. | Os |
| 4. | Fe | ||
| A | B | C | |
| 1. | 3 | 1 | 2 |
| 2. | 1 | 2 | 3 |
| 3. | 1 | 4 | 3 |
| 4. | 4 | 2 | 3 |
Match the statements given in Column I with the oxidation states given in Column and mark the correct option.
|
Column I |
Column II |
|
A. Oxidation state of Mn in is |
1. +2 2. +3 |
|
B. Most stable oxidation state of Mn is |
3. +4 |
|
C. Most stable oxidation state of Mn in oxides is |
4. +5 |
|
D. Characteristic oxidation state of lanthanoids is |
5. +7 |
Codes
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 5 | 2 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
Match the solutions given in Column I with the colours given in Column II.
| Column I - (Aqueous solution of salt) | Column II - (Colour) |
| A. FeSO4 .7H2O | 1. Green |
| B. NiCl2 . 4H2O | 2. Light pink |
| C. MnCl2.4H2O | 3. Blue |
| D. CoCl2. 6H2O | 4. Pale green |
| 5. Pink |
Codes
| A | B | C | D | |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 5 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 1 | 2 | 5 |
Match the property given in Column I with the element given in Column II.
|
Column I ( Property) |
Column II (Element) |
|
A. Lanthanoid which shows + 4 oxidation state |
1. Pm |
|
B. Radioactive lanthanoid |
2. Ce |
|
C. Lanthanoid which has 4 electronic configurations in +3 oxidation state |
3. Lu |
|
D. Lanthanoid which has 4 electronic configurations in +3 oxidation state |
4. Gd |
Codes
| Options: | A | B | C | D |
| 1. | 2 | 4 | 1 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 2 | 1 | 4 | 3 |
| 4. | 4 | 1 | 3 | 2 |
Match the properties given in Column I with the metals given in Column II and mark the appropriate answer.
|
Column I (Property) |
Column II (Metal) |
|
A. Element with highest second ionisation enthalpy |
i. Co ii. Cr |
|
B. Element with highest third ionisation enthalpy |
iii. Cu |
|
C. M in M(CO is |
iv. Zn |
|
D. Element with highest heat of atomisation |
v. Ni |
Assertion (A) C iodide is not known.
Reason (R) C oxidises to iodine.
1. Both assertion and reason are true, and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. Assertion is not true but the reason is true.
4. Both assertion and reason are false.
Given below are two statements:
| Assertion (A): | Separation of Zr and Hf is difficult. |
| Reason (R): | Because Zr and Hf lie in the same group of the periodic table. |
| 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 not true but (R) is true |
| 4. | Both (A) and (R) are false. |
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