Classification of Elements and Periodicity in Properties
89335
The Oxidation number of chlorine in $\mathrm{KClO}_3$ is
1 +5
2 -5
3 +1
4 -1
Explanation:
Given that, $\mathrm{KClO}_3$ Let the oxidation number of $\mathrm{Cl}$ is $\mathrm{x}$. We know that, the oxidation state of $\mathrm{K}$ is +1 , and oxygen is -2 . $$ \begin{aligned} & \therefore \operatorname{In~} \mathrm{KClO}_3 \\ & 1+\mathrm{X}+3(-2)=0 \\ & \mathrm{X}-5=0 \\ & \mathrm{X}=+5 \end{aligned} $$
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89336
In which of the following sulphur has the lowest oxidation state?
1 $\mathrm{H}_2 \mathrm{SO}_4$
2 $\mathrm{SO}_2$
3 $\mathrm{H}_2 \mathrm{SO}_3$
4 $\mathrm{H}_2 \mathrm{~S}$
Explanation:
\[ \begin{array}{l} \text { (i) } \mathrm{In}_{2} \mathrm{SO}_{4} \\ 2 \times(+1)+x+4(-2)=0 \\ 2+x-8=0 \\ x=+6 \end{array} \] \[ \begin{array}{l} \text { (iii) In } \mathrm{H}_{2} \mathrm{SO}_{3} \\ 2(+1)+x+3(-2)=0 \\ +2+\mathrm{x}-6=0 \\ x-4=0 \\ x=+4 \end{array} \] \[ \begin{array}{l} \text { (ii) } \mathrm{In}_{\mathrm{SO}_{2}} \\ x+2(-2)=0 \\ -4+x=0 \\ \mathrm{x}=+4 \end{array} \] (iv) In \( \mathrm{H}_{2} \mathrm{~S} \) \[ \begin{array}{l} 2(+1)+x=0 \\ 2+x=0 \\ x=-2 \end{array} \] Hence, In $\mathrm{H}_2 \mathrm{~S}$ has the lowest oxidation state of sulphur.
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89311
Which among the following structures does not correctly represent the bonding capacities (valancies) of the atoms involved?
1
2
3
4
Explanation:
This structure not correctly represent the bonding capacities i.e. valencies in the atoms involved. because valency of carbon is 4 but one carbon has three bonds and other five.
Shift-II
Classification of Elements and Periodicity in Properties
89307
Choose the correct stability order of group 13 element in their +1 oxidation state.
The correct stability order of group 13 element in their +1 oxidation state is - $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$ Because, inert pair effect as you moving down the group, the stability of oxidation state the increases while the stability of +3 oxidation state decreases.
Shift-I
Classification of Elements and Periodicity in Properties
89312
1 mole of metal ' $M$ ' reacts completely with alcohol to give 1.5 moles of $\mathrm{H}_2$. Then what will be the valency of metal ' $M$ '?
1 4
2 3
3 2
4 1
Explanation:
On the reaction of metal and the alcohol, the metal replace the hydrogen ion of the alcohol, and liberates hydrogen gas. The reaction can be written as$\mathrm{M}^{\mathrm{nt}}+\mathrm{R}-\mathrm{OH} \rightarrow(\mathrm{R}-\mathrm{O}) \mathrm{n} \mathrm{M}+1 / 2 \mathrm{H}_2$ If one mole of metal gives $3 / 2$ moles of hydrogen, it can be written as $-\mathrm{M} \rightarrow \mathrm{m}^{3+}+3 \mathrm{e}^{-}$ Therefore, the valency of metal is 3 .
Classification of Elements and Periodicity in Properties
89335
The Oxidation number of chlorine in $\mathrm{KClO}_3$ is
1 +5
2 -5
3 +1
4 -1
Explanation:
Given that, $\mathrm{KClO}_3$ Let the oxidation number of $\mathrm{Cl}$ is $\mathrm{x}$. We know that, the oxidation state of $\mathrm{K}$ is +1 , and oxygen is -2 . $$ \begin{aligned} & \therefore \operatorname{In~} \mathrm{KClO}_3 \\ & 1+\mathrm{X}+3(-2)=0 \\ & \mathrm{X}-5=0 \\ & \mathrm{X}=+5 \end{aligned} $$
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89336
In which of the following sulphur has the lowest oxidation state?
1 $\mathrm{H}_2 \mathrm{SO}_4$
2 $\mathrm{SO}_2$
3 $\mathrm{H}_2 \mathrm{SO}_3$
4 $\mathrm{H}_2 \mathrm{~S}$
Explanation:
\[ \begin{array}{l} \text { (i) } \mathrm{In}_{2} \mathrm{SO}_{4} \\ 2 \times(+1)+x+4(-2)=0 \\ 2+x-8=0 \\ x=+6 \end{array} \] \[ \begin{array}{l} \text { (iii) In } \mathrm{H}_{2} \mathrm{SO}_{3} \\ 2(+1)+x+3(-2)=0 \\ +2+\mathrm{x}-6=0 \\ x-4=0 \\ x=+4 \end{array} \] \[ \begin{array}{l} \text { (ii) } \mathrm{In}_{\mathrm{SO}_{2}} \\ x+2(-2)=0 \\ -4+x=0 \\ \mathrm{x}=+4 \end{array} \] (iv) In \( \mathrm{H}_{2} \mathrm{~S} \) \[ \begin{array}{l} 2(+1)+x=0 \\ 2+x=0 \\ x=-2 \end{array} \] Hence, In $\mathrm{H}_2 \mathrm{~S}$ has the lowest oxidation state of sulphur.
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89311
Which among the following structures does not correctly represent the bonding capacities (valancies) of the atoms involved?
1
2
3
4
Explanation:
This structure not correctly represent the bonding capacities i.e. valencies in the atoms involved. because valency of carbon is 4 but one carbon has three bonds and other five.
Shift-II
Classification of Elements and Periodicity in Properties
89307
Choose the correct stability order of group 13 element in their +1 oxidation state.
The correct stability order of group 13 element in their +1 oxidation state is - $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$ Because, inert pair effect as you moving down the group, the stability of oxidation state the increases while the stability of +3 oxidation state decreases.
Shift-I
Classification of Elements and Periodicity in Properties
89312
1 mole of metal ' $M$ ' reacts completely with alcohol to give 1.5 moles of $\mathrm{H}_2$. Then what will be the valency of metal ' $M$ '?
1 4
2 3
3 2
4 1
Explanation:
On the reaction of metal and the alcohol, the metal replace the hydrogen ion of the alcohol, and liberates hydrogen gas. The reaction can be written as$\mathrm{M}^{\mathrm{nt}}+\mathrm{R}-\mathrm{OH} \rightarrow(\mathrm{R}-\mathrm{O}) \mathrm{n} \mathrm{M}+1 / 2 \mathrm{H}_2$ If one mole of metal gives $3 / 2$ moles of hydrogen, it can be written as $-\mathrm{M} \rightarrow \mathrm{m}^{3+}+3 \mathrm{e}^{-}$ Therefore, the valency of metal is 3 .
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Classification of Elements and Periodicity in Properties
89335
The Oxidation number of chlorine in $\mathrm{KClO}_3$ is
1 +5
2 -5
3 +1
4 -1
Explanation:
Given that, $\mathrm{KClO}_3$ Let the oxidation number of $\mathrm{Cl}$ is $\mathrm{x}$. We know that, the oxidation state of $\mathrm{K}$ is +1 , and oxygen is -2 . $$ \begin{aligned} & \therefore \operatorname{In~} \mathrm{KClO}_3 \\ & 1+\mathrm{X}+3(-2)=0 \\ & \mathrm{X}-5=0 \\ & \mathrm{X}=+5 \end{aligned} $$
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89336
In which of the following sulphur has the lowest oxidation state?
1 $\mathrm{H}_2 \mathrm{SO}_4$
2 $\mathrm{SO}_2$
3 $\mathrm{H}_2 \mathrm{SO}_3$
4 $\mathrm{H}_2 \mathrm{~S}$
Explanation:
\[ \begin{array}{l} \text { (i) } \mathrm{In}_{2} \mathrm{SO}_{4} \\ 2 \times(+1)+x+4(-2)=0 \\ 2+x-8=0 \\ x=+6 \end{array} \] \[ \begin{array}{l} \text { (iii) In } \mathrm{H}_{2} \mathrm{SO}_{3} \\ 2(+1)+x+3(-2)=0 \\ +2+\mathrm{x}-6=0 \\ x-4=0 \\ x=+4 \end{array} \] \[ \begin{array}{l} \text { (ii) } \mathrm{In}_{\mathrm{SO}_{2}} \\ x+2(-2)=0 \\ -4+x=0 \\ \mathrm{x}=+4 \end{array} \] (iv) In \( \mathrm{H}_{2} \mathrm{~S} \) \[ \begin{array}{l} 2(+1)+x=0 \\ 2+x=0 \\ x=-2 \end{array} \] Hence, In $\mathrm{H}_2 \mathrm{~S}$ has the lowest oxidation state of sulphur.
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89311
Which among the following structures does not correctly represent the bonding capacities (valancies) of the atoms involved?
1
2
3
4
Explanation:
This structure not correctly represent the bonding capacities i.e. valencies in the atoms involved. because valency of carbon is 4 but one carbon has three bonds and other five.
Shift-II
Classification of Elements and Periodicity in Properties
89307
Choose the correct stability order of group 13 element in their +1 oxidation state.
The correct stability order of group 13 element in their +1 oxidation state is - $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$ Because, inert pair effect as you moving down the group, the stability of oxidation state the increases while the stability of +3 oxidation state decreases.
Shift-I
Classification of Elements and Periodicity in Properties
89312
1 mole of metal ' $M$ ' reacts completely with alcohol to give 1.5 moles of $\mathrm{H}_2$. Then what will be the valency of metal ' $M$ '?
1 4
2 3
3 2
4 1
Explanation:
On the reaction of metal and the alcohol, the metal replace the hydrogen ion of the alcohol, and liberates hydrogen gas. The reaction can be written as$\mathrm{M}^{\mathrm{nt}}+\mathrm{R}-\mathrm{OH} \rightarrow(\mathrm{R}-\mathrm{O}) \mathrm{n} \mathrm{M}+1 / 2 \mathrm{H}_2$ If one mole of metal gives $3 / 2$ moles of hydrogen, it can be written as $-\mathrm{M} \rightarrow \mathrm{m}^{3+}+3 \mathrm{e}^{-}$ Therefore, the valency of metal is 3 .
Classification of Elements and Periodicity in Properties
89335
The Oxidation number of chlorine in $\mathrm{KClO}_3$ is
1 +5
2 -5
3 +1
4 -1
Explanation:
Given that, $\mathrm{KClO}_3$ Let the oxidation number of $\mathrm{Cl}$ is $\mathrm{x}$. We know that, the oxidation state of $\mathrm{K}$ is +1 , and oxygen is -2 . $$ \begin{aligned} & \therefore \operatorname{In~} \mathrm{KClO}_3 \\ & 1+\mathrm{X}+3(-2)=0 \\ & \mathrm{X}-5=0 \\ & \mathrm{X}=+5 \end{aligned} $$
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89336
In which of the following sulphur has the lowest oxidation state?
1 $\mathrm{H}_2 \mathrm{SO}_4$
2 $\mathrm{SO}_2$
3 $\mathrm{H}_2 \mathrm{SO}_3$
4 $\mathrm{H}_2 \mathrm{~S}$
Explanation:
\[ \begin{array}{l} \text { (i) } \mathrm{In}_{2} \mathrm{SO}_{4} \\ 2 \times(+1)+x+4(-2)=0 \\ 2+x-8=0 \\ x=+6 \end{array} \] \[ \begin{array}{l} \text { (iii) In } \mathrm{H}_{2} \mathrm{SO}_{3} \\ 2(+1)+x+3(-2)=0 \\ +2+\mathrm{x}-6=0 \\ x-4=0 \\ x=+4 \end{array} \] \[ \begin{array}{l} \text { (ii) } \mathrm{In}_{\mathrm{SO}_{2}} \\ x+2(-2)=0 \\ -4+x=0 \\ \mathrm{x}=+4 \end{array} \] (iv) In \( \mathrm{H}_{2} \mathrm{~S} \) \[ \begin{array}{l} 2(+1)+x=0 \\ 2+x=0 \\ x=-2 \end{array} \] Hence, In $\mathrm{H}_2 \mathrm{~S}$ has the lowest oxidation state of sulphur.
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89311
Which among the following structures does not correctly represent the bonding capacities (valancies) of the atoms involved?
1
2
3
4
Explanation:
This structure not correctly represent the bonding capacities i.e. valencies in the atoms involved. because valency of carbon is 4 but one carbon has three bonds and other five.
Shift-II
Classification of Elements and Periodicity in Properties
89307
Choose the correct stability order of group 13 element in their +1 oxidation state.
The correct stability order of group 13 element in their +1 oxidation state is - $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$ Because, inert pair effect as you moving down the group, the stability of oxidation state the increases while the stability of +3 oxidation state decreases.
Shift-I
Classification of Elements and Periodicity in Properties
89312
1 mole of metal ' $M$ ' reacts completely with alcohol to give 1.5 moles of $\mathrm{H}_2$. Then what will be the valency of metal ' $M$ '?
1 4
2 3
3 2
4 1
Explanation:
On the reaction of metal and the alcohol, the metal replace the hydrogen ion of the alcohol, and liberates hydrogen gas. The reaction can be written as$\mathrm{M}^{\mathrm{nt}}+\mathrm{R}-\mathrm{OH} \rightarrow(\mathrm{R}-\mathrm{O}) \mathrm{n} \mathrm{M}+1 / 2 \mathrm{H}_2$ If one mole of metal gives $3 / 2$ moles of hydrogen, it can be written as $-\mathrm{M} \rightarrow \mathrm{m}^{3+}+3 \mathrm{e}^{-}$ Therefore, the valency of metal is 3 .
Classification of Elements and Periodicity in Properties
89335
The Oxidation number of chlorine in $\mathrm{KClO}_3$ is
1 +5
2 -5
3 +1
4 -1
Explanation:
Given that, $\mathrm{KClO}_3$ Let the oxidation number of $\mathrm{Cl}$ is $\mathrm{x}$. We know that, the oxidation state of $\mathrm{K}$ is +1 , and oxygen is -2 . $$ \begin{aligned} & \therefore \operatorname{In~} \mathrm{KClO}_3 \\ & 1+\mathrm{X}+3(-2)=0 \\ & \mathrm{X}-5=0 \\ & \mathrm{X}=+5 \end{aligned} $$
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89336
In which of the following sulphur has the lowest oxidation state?
1 $\mathrm{H}_2 \mathrm{SO}_4$
2 $\mathrm{SO}_2$
3 $\mathrm{H}_2 \mathrm{SO}_3$
4 $\mathrm{H}_2 \mathrm{~S}$
Explanation:
\[ \begin{array}{l} \text { (i) } \mathrm{In}_{2} \mathrm{SO}_{4} \\ 2 \times(+1)+x+4(-2)=0 \\ 2+x-8=0 \\ x=+6 \end{array} \] \[ \begin{array}{l} \text { (iii) In } \mathrm{H}_{2} \mathrm{SO}_{3} \\ 2(+1)+x+3(-2)=0 \\ +2+\mathrm{x}-6=0 \\ x-4=0 \\ x=+4 \end{array} \] \[ \begin{array}{l} \text { (ii) } \mathrm{In}_{\mathrm{SO}_{2}} \\ x+2(-2)=0 \\ -4+x=0 \\ \mathrm{x}=+4 \end{array} \] (iv) In \( \mathrm{H}_{2} \mathrm{~S} \) \[ \begin{array}{l} 2(+1)+x=0 \\ 2+x=0 \\ x=-2 \end{array} \] Hence, In $\mathrm{H}_2 \mathrm{~S}$ has the lowest oxidation state of sulphur.
AP EAMCET- 1993
Classification of Elements and Periodicity in Properties
89311
Which among the following structures does not correctly represent the bonding capacities (valancies) of the atoms involved?
1
2
3
4
Explanation:
This structure not correctly represent the bonding capacities i.e. valencies in the atoms involved. because valency of carbon is 4 but one carbon has three bonds and other five.
Shift-II
Classification of Elements and Periodicity in Properties
89307
Choose the correct stability order of group 13 element in their +1 oxidation state.
The correct stability order of group 13 element in their +1 oxidation state is - $\mathrm{Al}<\mathrm{Ga}<\mathrm{In}<\mathrm{Tl}$ Because, inert pair effect as you moving down the group, the stability of oxidation state the increases while the stability of +3 oxidation state decreases.
Shift-I
Classification of Elements and Periodicity in Properties
89312
1 mole of metal ' $M$ ' reacts completely with alcohol to give 1.5 moles of $\mathrm{H}_2$. Then what will be the valency of metal ' $M$ '?
1 4
2 3
3 2
4 1
Explanation:
On the reaction of metal and the alcohol, the metal replace the hydrogen ion of the alcohol, and liberates hydrogen gas. The reaction can be written as$\mathrm{M}^{\mathrm{nt}}+\mathrm{R}-\mathrm{OH} \rightarrow(\mathrm{R}-\mathrm{O}) \mathrm{n} \mathrm{M}+1 / 2 \mathrm{H}_2$ If one mole of metal gives $3 / 2$ moles of hydrogen, it can be written as $-\mathrm{M} \rightarrow \mathrm{m}^{3+}+3 \mathrm{e}^{-}$ Therefore, the valency of metal is 3 .
