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Q. No.Which of the following options is incorrect:
1. Carbon can have negative oxidation state in its compounds.
2. \(CO_2\) is most acidic oxide among oxides of group-14 elements.
3. Maximum covalency of carbon is four.
4. Carbon has least catenation property in group 14.
1. Carbon can have negative oxidation state in its compounds.
2. \(CO_2\) is most acidic oxide among oxides of group-14 elements.
3. Maximum covalency of carbon is four.
4. Carbon has least catenation property in group 14.
Subtopic: Boron Family- Preparations, Properties & Uses | Carbon Family - Preparations, Properties & Uses |
Level 4: Below 35%
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Identify the three salts X, Y, and Z respectively when salt (X) is soluble in water, salt (Y) is sparingly soluble in water and salt (Z) is soluble in hot water only:
1. \(AgCl, Hg_2Cl_2 , PbCl_2 \)
2. \(AlCl_3 , AgCl, PbCl_2\)
3. \(BaCl_2 , PbCl_2 , Hg_2Cl_2\)
4. \( MgCl_2 , Hg_2Cl_2 , CaCl_2 \)
1. \(AgCl, Hg_2Cl_2 , PbCl_2 \)
2. \(AlCl_3 , AgCl, PbCl_2\)
3. \(BaCl_2 , PbCl_2 , Hg_2Cl_2\)
4. \( MgCl_2 , Hg_2Cl_2 , CaCl_2 \)
Subtopic: Boron Family- Preparations, Properties & Uses | Carbon Family - Preparations, Properties & Uses |
56%
Level 3: 35%-60%
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Hints
Given below are two statements:
1. Statement-I is correct and Statement-II is incorrect.
2. Statement-I and Statement II both are correct.
3. Statement-I is incorrect while Statement-II is correct.
4. Both Statements are incorrect
| Statement-I: | \(BCl_3\) and \(AlCl_3\) are covalent compounds. |
| Statement-II: | \(BCl_3\) on reaction with water produces \(\left[\mathrm{B}(\mathrm{OH})_4\right]^{-}\) ion and \(\left[\mathrm{B}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}\) ions. |
1. Statement-I is correct and Statement-II is incorrect.
2. Statement-I and Statement II both are correct.
3. Statement-I is incorrect while Statement-II is correct.
4. Both Statements are incorrect
Subtopic: Boron Family- Preparations, Properties & Uses |
61%
Level 2: 60%+
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Two elements of p-block can form following halides \( XF_3\) & \(YF_3 .\) If \(XF_3\) can act as Lewis acid and \(YF_3\) can act as Lewis base. Then determine the hybridization of ‘X’ & ‘Y’ in \(XF_3 ~\& ~YF_3\) respectively:
1. \(sp^2 , sp^ 2\)
2. \( sp^3 , sp^ 2 \)
3. \( sp^2 , sp^ 3 \)
4. \( sp^3 , sp^ 3\)
1. \(sp^2 , sp^ 2\)
2. \( sp^3 , sp^ 2 \)
3. \( sp^2 , sp^ 3 \)
4. \( sp^3 , sp^ 3\)
Subtopic: Boron Family- Preparations, Properties & Uses | Compounds of Boron- Preparations, Properties & Uses |
82%
Level 1: 80%+
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Hints
Consider the following changes:
\(\begin{array}{cc} \mathrm{SnO}_2 \rightarrow \mathrm{SnO} & \Delta \mathrm{G}_1^0 \\ \mathrm{PbO}_2 \rightarrow \mathrm{PbO} & \Delta \mathrm{G}_2^0 \end{array}\)
Choose the correct option:
1. \( \Delta \mathrm{G}_1^0>0, \Delta \mathrm{G}_2^0>0\)
2. \( \Delta \mathrm{G}_1^0>0, \Delta \mathrm{G}_2^0<0 \)
3. \( \Delta \mathrm{G}_1^0<0, \Delta \mathrm{G}_2^0<0 \)
4. \( \Delta \mathrm{G}_1^0<0, \Delta \mathrm{G}_2^0>0 \)
\(\begin{array}{cc} \mathrm{SnO}_2 \rightarrow \mathrm{SnO} & \Delta \mathrm{G}_1^0 \\ \mathrm{PbO}_2 \rightarrow \mathrm{PbO} & \Delta \mathrm{G}_2^0 \end{array}\)
Choose the correct option:
1. \( \Delta \mathrm{G}_1^0>0, \Delta \mathrm{G}_2^0>0\)
2. \( \Delta \mathrm{G}_1^0>0, \Delta \mathrm{G}_2^0<0 \)
3. \( \Delta \mathrm{G}_1^0<0, \Delta \mathrm{G}_2^0<0 \)
4. \( \Delta \mathrm{G}_1^0<0, \Delta \mathrm{G}_2^0>0 \)
Subtopic: Carbon Family - Preparations, Properties & Uses | Properties of Glass, Pb & Sn compounds |
81%
Level 1: 80%+
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Hints
Consider the following statements about group 13 elements of the periodic table:
(A) Electronegativity decreases down the group.
(B) Size increases down the group.
(C) Ionization energy decreases down the group.
(D) Boiling point of Boron is maximum.
(E) Melting point of Boron is maximum.
1. A, B, C are correct
2. A, D, E are correct
3. D and E are correct
4. A, B, C, D and E are correct
(A) Electronegativity decreases down the group.
(B) Size increases down the group.
(C) Ionization energy decreases down the group.
(D) Boiling point of Boron is maximum.
(E) Melting point of Boron is maximum.
1. A, B, C are correct
2. A, D, E are correct
3. D and E are correct
4. A, B, C, D and E are correct
Subtopic: Boron Family- Preparations, Properties & Uses |
55%
Level 3: 35%-60%
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Given below are the atomic numbers of some group 14 elements. Find out the atomic number of the element with the lowest melting point :
1. 14
2. 6
3. 82
4. 50
1. 14
2. 6
3. 82
4. 50
Subtopic: Compounds of Carbon, Preparations, Properties & Uses |
Level 3: 35%-60%
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Hints
Among the elements In, Tl, Al, Pb, Sn, and Ge, what are the most stable oxidation states for the element with the highest first ionisation enthalpy and the element with the lowest first ionisation enthalpy, respectively?
| 1. | +2 and +3 | 2. | +4 and +3 |
| 3. | +4 and +1 | 4. | +1 and +4 |
Subtopic: Boron Family- Preparations, Properties & Uses | Carbon Family - Preparations, Properties & Uses |
Level 3: 35%-60%
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Subtopic: Boron Family- Preparations, Properties & Uses |
70%
Level 2: 60%+
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Which of the following is the correct order ?
1. \(\mathrm{B}<\mathrm{Ga}<\mathrm{Al}<\mathrm{In}<\mathrm{Tl}\) (Atomic radius)
2. \(\mathrm{B}>\mathrm{Ga}>\mathrm{Tl}>\mathrm{In}\) (First Ionisation enthalpy)
3. \(\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{B}>\mathrm{Al}\) (Density)
4. \(\mathrm{B}<\mathrm{Ga}<\mathrm{Al}<\mathrm{In}<\mathrm{Tl}\) (EN order)
1. \(\mathrm{B}<\mathrm{Ga}<\mathrm{Al}<\mathrm{In}<\mathrm{Tl}\) (Atomic radius)
2. \(\mathrm{B}>\mathrm{Ga}>\mathrm{Tl}>\mathrm{In}\) (First Ionisation enthalpy)
3. \(\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{B}>\mathrm{Al}\) (Density)
4. \(\mathrm{B}<\mathrm{Ga}<\mathrm{Al}<\mathrm{In}<\mathrm{Tl}\) (EN order)
Subtopic: Boron Family- Preparations, Properties & Uses |
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Level 1: 80%+
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