Classification of Elements and Periodicity in Properties
89330
Which one of the following elements show different oxidation states?
1 Sodium
2 Fluorine
3 Chlorine
4 Potassium
Explanation:
The elements having d-orbital shows different oxidation states. In the given elements only chlorine has vacant d-orbital. So, it can show $-1,+1,+3,+5$ and +7 oxidation state.
AP-EAMCET (Medical)
Classification of Elements and Periodicity in Properties
89331
Metals having $\mathrm{ns}^1$ as the valence electronic configuration:
1 are strong oxidizing agents
2 are highly electronegative
3 are highly electropositive
4 have a first ionization potential of more than $10 \mathrm{eV} /$ atom
Explanation:
If the outer electronic configuration goes to $\mathrm{ns}^1$ valence shell then the metal is belongs to the alkali metal. As we know, alkali metals are more electropositive with low ionization energies in the periodic table. Electropositivity increases down the group in the alkali metal.
AP-EAMCET (Med.)-1999
Classification of Elements and Periodicity in Properties
89332
Which of the following covalent molecules is an exception of octet rule?
1 $\mathrm{BeCl}_2$
2 $\mathrm{CO}_2$
3 $\mathrm{H}_2 \mathrm{O}$
4 $\mathrm{CH}_4$
Explanation:
$\mathrm{BeCl}_2$ has a covalent molecule. In Beryllium, there are 4 electron in $\mathrm{BeCl}_2$. Hence, octet rule is not obeyed in $\mathrm{BeCl}_2$.
AP-EAMCET/1999
Classification of Elements and Periodicity in Properties
89333
Which of the following sequence is correct with reference to the oxidation number of iodine?
The formula of sodium amalgam is $\mathrm{Na}-\mathrm{Hg}$ Sodium amalgam's are mixture not a compound. The oxidation state of metal in sodium. Amalgam is always zero. Hence, the oxidation number of sodium in sodium amalgam is zero.
Classification of Elements and Periodicity in Properties
89330
Which one of the following elements show different oxidation states?
1 Sodium
2 Fluorine
3 Chlorine
4 Potassium
Explanation:
The elements having d-orbital shows different oxidation states. In the given elements only chlorine has vacant d-orbital. So, it can show $-1,+1,+3,+5$ and +7 oxidation state.
AP-EAMCET (Medical)
Classification of Elements and Periodicity in Properties
89331
Metals having $\mathrm{ns}^1$ as the valence electronic configuration:
1 are strong oxidizing agents
2 are highly electronegative
3 are highly electropositive
4 have a first ionization potential of more than $10 \mathrm{eV} /$ atom
Explanation:
If the outer electronic configuration goes to $\mathrm{ns}^1$ valence shell then the metal is belongs to the alkali metal. As we know, alkali metals are more electropositive with low ionization energies in the periodic table. Electropositivity increases down the group in the alkali metal.
AP-EAMCET (Med.)-1999
Classification of Elements and Periodicity in Properties
89332
Which of the following covalent molecules is an exception of octet rule?
1 $\mathrm{BeCl}_2$
2 $\mathrm{CO}_2$
3 $\mathrm{H}_2 \mathrm{O}$
4 $\mathrm{CH}_4$
Explanation:
$\mathrm{BeCl}_2$ has a covalent molecule. In Beryllium, there are 4 electron in $\mathrm{BeCl}_2$. Hence, octet rule is not obeyed in $\mathrm{BeCl}_2$.
AP-EAMCET/1999
Classification of Elements and Periodicity in Properties
89333
Which of the following sequence is correct with reference to the oxidation number of iodine?
The formula of sodium amalgam is $\mathrm{Na}-\mathrm{Hg}$ Sodium amalgam's are mixture not a compound. The oxidation state of metal in sodium. Amalgam is always zero. Hence, the oxidation number of sodium in sodium amalgam is zero.
Classification of Elements and Periodicity in Properties
89330
Which one of the following elements show different oxidation states?
1 Sodium
2 Fluorine
3 Chlorine
4 Potassium
Explanation:
The elements having d-orbital shows different oxidation states. In the given elements only chlorine has vacant d-orbital. So, it can show $-1,+1,+3,+5$ and +7 oxidation state.
AP-EAMCET (Medical)
Classification of Elements and Periodicity in Properties
89331
Metals having $\mathrm{ns}^1$ as the valence electronic configuration:
1 are strong oxidizing agents
2 are highly electronegative
3 are highly electropositive
4 have a first ionization potential of more than $10 \mathrm{eV} /$ atom
Explanation:
If the outer electronic configuration goes to $\mathrm{ns}^1$ valence shell then the metal is belongs to the alkali metal. As we know, alkali metals are more electropositive with low ionization energies in the periodic table. Electropositivity increases down the group in the alkali metal.
AP-EAMCET (Med.)-1999
Classification of Elements and Periodicity in Properties
89332
Which of the following covalent molecules is an exception of octet rule?
1 $\mathrm{BeCl}_2$
2 $\mathrm{CO}_2$
3 $\mathrm{H}_2 \mathrm{O}$
4 $\mathrm{CH}_4$
Explanation:
$\mathrm{BeCl}_2$ has a covalent molecule. In Beryllium, there are 4 electron in $\mathrm{BeCl}_2$. Hence, octet rule is not obeyed in $\mathrm{BeCl}_2$.
AP-EAMCET/1999
Classification of Elements and Periodicity in Properties
89333
Which of the following sequence is correct with reference to the oxidation number of iodine?
The formula of sodium amalgam is $\mathrm{Na}-\mathrm{Hg}$ Sodium amalgam's are mixture not a compound. The oxidation state of metal in sodium. Amalgam is always zero. Hence, the oxidation number of sodium in sodium amalgam is zero.
Classification of Elements and Periodicity in Properties
89330
Which one of the following elements show different oxidation states?
1 Sodium
2 Fluorine
3 Chlorine
4 Potassium
Explanation:
The elements having d-orbital shows different oxidation states. In the given elements only chlorine has vacant d-orbital. So, it can show $-1,+1,+3,+5$ and +7 oxidation state.
AP-EAMCET (Medical)
Classification of Elements and Periodicity in Properties
89331
Metals having $\mathrm{ns}^1$ as the valence electronic configuration:
1 are strong oxidizing agents
2 are highly electronegative
3 are highly electropositive
4 have a first ionization potential of more than $10 \mathrm{eV} /$ atom
Explanation:
If the outer electronic configuration goes to $\mathrm{ns}^1$ valence shell then the metal is belongs to the alkali metal. As we know, alkali metals are more electropositive with low ionization energies in the periodic table. Electropositivity increases down the group in the alkali metal.
AP-EAMCET (Med.)-1999
Classification of Elements and Periodicity in Properties
89332
Which of the following covalent molecules is an exception of octet rule?
1 $\mathrm{BeCl}_2$
2 $\mathrm{CO}_2$
3 $\mathrm{H}_2 \mathrm{O}$
4 $\mathrm{CH}_4$
Explanation:
$\mathrm{BeCl}_2$ has a covalent molecule. In Beryllium, there are 4 electron in $\mathrm{BeCl}_2$. Hence, octet rule is not obeyed in $\mathrm{BeCl}_2$.
AP-EAMCET/1999
Classification of Elements and Periodicity in Properties
89333
Which of the following sequence is correct with reference to the oxidation number of iodine?
The formula of sodium amalgam is $\mathrm{Na}-\mathrm{Hg}$ Sodium amalgam's are mixture not a compound. The oxidation state of metal in sodium. Amalgam is always zero. Hence, the oxidation number of sodium in sodium amalgam is zero.
