The major product Z formed in the following sequence of reactions is:
\(C_2H_6 \xrightarrow[UV\ light]{Cl_2} X \text{ (monochlorinated product)} \xrightarrow{NH_3} Y \xrightarrow[(ii)\ H_2O]{(i)\ NaNO_2,\ HCl} Z~\)
1. \(C_2H_5 - N = N - OH~\)
2. \(C_2H_5OH~\)
3. \(C_2H_5NO_2~\)
4. \(C_2H_5NH_2~\)
\(C_2H_6 \xrightarrow[UV\ light]{Cl_2} X \text{ (monochlorinated product)} \xrightarrow{NH_3} Y \xrightarrow[(ii)\ H_2O]{(i)\ NaNO_2,\ HCl} Z~\)
1. \(C_2H_5 - N = N - OH~\)
2. \(C_2H_5OH~\)
3. \(C_2H_5NO_2~\)
4. \(C_2H_5NH_2~\)
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Although +3 oxidation state is most common in lanthanoids, cerium still shows +4 oxidation state because :
| 1. | After losing one more electron, it acquires \(4f^{14}\) electronic configuration. |
| 2. | Its nearest inert gas is Radon. |
| 3. | After losing one more electron, it acquires \(4f^0\) electronic configuration. |
| 4. | Its atomic number is 61. |
Level 4: Below 35%
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Methane reacts with steam at 1273 K in the presence of nickel catalyst to form:
1. \(CO\) and \(H_2~\)
2. \(CO\) and \(H_2O~\)
3. \(CO_2\) and \(H_2O~\)
4. \(CO_2\) and \(H_2~\)
1. \(CO\) and \(H_2~\)
2. \(CO\) and \(H_2O~\)
3. \(CO_2\) and \(H_2O~\)
4. \(CO_2\) and \(H_2~\)
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Identify the incorrect statement from the following :
| 1. | Oxygen exhibits only -2 oxidation state. |
| 2. | The order of catenation property of Group 14 elements is C>> Si > Ge ≈ Sn. |
| 3. | Carbon has the ability to form π-π multiple bond with itself. |
| 4. | \(ECl_3\) (E = B and Al) is a monomer when E = B and a dimer when E = Al. |
Level 4: Below 35%
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Phenolphthalein is used as an indicator for the titration of sodium hydroxide solution against a standard solution of oxalic acid. The colour change that is observed at an alkaline pH close to the equivalence point during this titration is :
1. pink to colourless
2. pinkish red to yellow
3. colourless to pink
4. yellow to pinkish red
1. pink to colourless
2. pinkish red to yellow
3. colourless to pink
4. yellow to pinkish red
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Identify the incorrect statement from the following:
| 1. | The IUPAC name of the element with atomic number 107 is Unnilseptium. |
| 2. | The largest and the smallest species among \(\text{Mg}\), \(\text{Mg}^{2+}\), \(\text{Al}\) and \(\text{Al}^{3+}\) are \(\text{Al}\) and \(\text{Mg}^{2+}\), respectively. |
| 3. | The similarity in behaviour of \(\text{Li}\) with \(\text{Mg}\) is referred to as 'diagonal relationship'. |
| 4. | The oxidation state and covalency of \(\text{Al}\) in \([\text{AlCl}(\text{H}_2\text{O})_5]^{2+}\) are 3 and 6 respectively. |
Level 4: Below 35%
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The following two reactions give the same foul smelling product Z.
X and Z respectively, are
1. \(X = \text{AgCN}; Z = C_2H_5\text{CN}\)
2. \(X = \text{AgCN}; Z = C_2H_5\text{NC}\)
3. \(X = \text{KCN}; Z = C_2H_5\text{CN}\)
4. \(X = \text{KCN}; Z = C_2H_5\text{NC}\)
X and Z respectively, are
1. \(X = \text{AgCN}; Z = C_2H_5\text{CN}\)
2. \(X = \text{AgCN}; Z = C_2H_5\text{NC}\)
3. \(X = \text{KCN}; Z = C_2H_5\text{CN}\)
4. \(X = \text{KCN}; Z = C_2H_5\text{NC}\)
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The calculated 'spin-only' magnetic moment of \(Ti(3d^2)\)is:
1. 3.87 BM
2. 4.90 BM
3. 2.84 BM
4. 5.92 BM
1. 3.87 BM
2. 4.90 BM
3. 2.84 BM
4. 5.92 BM
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Match List I with List II:
Choose the correct answer from the options given
below:
1. А-III, B-IV, C-I, D-II
2. A-III, B-I, C-IV, D-II
3. A-II, B-I, C-IV, D-III
4. A-IV, B-I, C-III, D-II
| List I (Transition metal compound/complex) |
List II (Catalytic Role) |
||
| A. | \(V_2O_5\) | I. | Preparation of ammonia from \(N_2/H_2\) mixture |
| B. | Fe | II. | Polymerisation of alkynes |
| C. | \(PdCI_2\) | III. | Preparation of \(H_2SO_4\) from \(SO_2\) |
| D. | Ni complex | IV. | Oxidation of ethyne to ethanal |
below:
1. А-III, B-IV, C-I, D-II
2. A-III, B-I, C-IV, D-II
3. A-II, B-I, C-IV, D-III
4. A-IV, B-I, C-III, D-II
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Two product X and Y are formed in the following reaction sequence.
The suitable method that can be used for the separation of products X and Y is : 14
1. Continuous extractio ction
2. Differential extraction
3. Sublimation
4. Fractional distillation
The suitable method that can be used for the separation of products X and Y is : 14
1. Continuous extractio ction
2. Differential extraction
3. Sublimation
4. Fractional distillation
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