NEET Test Series from KOTA - 10 Papers In MS WORD
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Hydrogen
27618
Hardness of water is due to presence of salts of
1 \(Na^+\) and \(K^+\)
2 \(Ca^{2+}\) and \(Mg^{2+}\)
3 \(Ca^{2+}\) and \(K^{+}\)
4 \(Ca^{2+}\) and \(Na^{+}\)
Explanation:
(b) Hardness of water is due to the presence of bicarbonates, chlorides and sulphates of \(Ca\) and \(Mg\) on it. These \(C{a^{2 + }}\) and \(M{g^{2 + }}\) ions react with the anions of fatty acids present in soaps to form curdy white precipitates. As a result, hard water does not produce lather with soap immediately.
Hydrogen
27619
In which of the following reaction hydrogen peroxide is a reducing agent
(b) \(\mathop {C{l_2}}\limits_0 + {H_2}{O_2} \to \mathop {2HCl}\limits_{ - 1} + {O_2}\) In this reaction \({H_2}{O_2}\) works as reducing agent
Hydrogen
27678
Saline hydrides react explosively with water, such fires can be extinguished by
1 Water
2 Carbon dioxide
3 Sand
4 None of these
Explanation:
(c) Fire due to action of water on saline hydrides cannot be extinguished with water or \(C{O_2}\). These hydrides can reduce \(C{O_2}\) at high temperature to produce \({O_2}\).
Hydrogen
27679
Metals of groups \(7, 8\) and \(9\) do not form metallic hydrides. This is termed as
1 Hydride gap
2 Hydride shift
3 Anhydride
4 Dehydride
Explanation:
Metals of groups \(7,8\) and \(9\) do not from metallic hydrides. This is termed as hydride gap.
27618
Hardness of water is due to presence of salts of
1 \(Na^+\) and \(K^+\)
2 \(Ca^{2+}\) and \(Mg^{2+}\)
3 \(Ca^{2+}\) and \(K^{+}\)
4 \(Ca^{2+}\) and \(Na^{+}\)
Explanation:
(b) Hardness of water is due to the presence of bicarbonates, chlorides and sulphates of \(Ca\) and \(Mg\) on it. These \(C{a^{2 + }}\) and \(M{g^{2 + }}\) ions react with the anions of fatty acids present in soaps to form curdy white precipitates. As a result, hard water does not produce lather with soap immediately.
Hydrogen
27619
In which of the following reaction hydrogen peroxide is a reducing agent
(b) \(\mathop {C{l_2}}\limits_0 + {H_2}{O_2} \to \mathop {2HCl}\limits_{ - 1} + {O_2}\) In this reaction \({H_2}{O_2}\) works as reducing agent
Hydrogen
27678
Saline hydrides react explosively with water, such fires can be extinguished by
1 Water
2 Carbon dioxide
3 Sand
4 None of these
Explanation:
(c) Fire due to action of water on saline hydrides cannot be extinguished with water or \(C{O_2}\). These hydrides can reduce \(C{O_2}\) at high temperature to produce \({O_2}\).
Hydrogen
27679
Metals of groups \(7, 8\) and \(9\) do not form metallic hydrides. This is termed as
1 Hydride gap
2 Hydride shift
3 Anhydride
4 Dehydride
Explanation:
Metals of groups \(7,8\) and \(9\) do not from metallic hydrides. This is termed as hydride gap.
27618
Hardness of water is due to presence of salts of
1 \(Na^+\) and \(K^+\)
2 \(Ca^{2+}\) and \(Mg^{2+}\)
3 \(Ca^{2+}\) and \(K^{+}\)
4 \(Ca^{2+}\) and \(Na^{+}\)
Explanation:
(b) Hardness of water is due to the presence of bicarbonates, chlorides and sulphates of \(Ca\) and \(Mg\) on it. These \(C{a^{2 + }}\) and \(M{g^{2 + }}\) ions react with the anions of fatty acids present in soaps to form curdy white precipitates. As a result, hard water does not produce lather with soap immediately.
Hydrogen
27619
In which of the following reaction hydrogen peroxide is a reducing agent
(b) \(\mathop {C{l_2}}\limits_0 + {H_2}{O_2} \to \mathop {2HCl}\limits_{ - 1} + {O_2}\) In this reaction \({H_2}{O_2}\) works as reducing agent
Hydrogen
27678
Saline hydrides react explosively with water, such fires can be extinguished by
1 Water
2 Carbon dioxide
3 Sand
4 None of these
Explanation:
(c) Fire due to action of water on saline hydrides cannot be extinguished with water or \(C{O_2}\). These hydrides can reduce \(C{O_2}\) at high temperature to produce \({O_2}\).
Hydrogen
27679
Metals of groups \(7, 8\) and \(9\) do not form metallic hydrides. This is termed as
1 Hydride gap
2 Hydride shift
3 Anhydride
4 Dehydride
Explanation:
Metals of groups \(7,8\) and \(9\) do not from metallic hydrides. This is termed as hydride gap.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Hydrogen
27618
Hardness of water is due to presence of salts of
1 \(Na^+\) and \(K^+\)
2 \(Ca^{2+}\) and \(Mg^{2+}\)
3 \(Ca^{2+}\) and \(K^{+}\)
4 \(Ca^{2+}\) and \(Na^{+}\)
Explanation:
(b) Hardness of water is due to the presence of bicarbonates, chlorides and sulphates of \(Ca\) and \(Mg\) on it. These \(C{a^{2 + }}\) and \(M{g^{2 + }}\) ions react with the anions of fatty acids present in soaps to form curdy white precipitates. As a result, hard water does not produce lather with soap immediately.
Hydrogen
27619
In which of the following reaction hydrogen peroxide is a reducing agent
(b) \(\mathop {C{l_2}}\limits_0 + {H_2}{O_2} \to \mathop {2HCl}\limits_{ - 1} + {O_2}\) In this reaction \({H_2}{O_2}\) works as reducing agent
Hydrogen
27678
Saline hydrides react explosively with water, such fires can be extinguished by
1 Water
2 Carbon dioxide
3 Sand
4 None of these
Explanation:
(c) Fire due to action of water on saline hydrides cannot be extinguished with water or \(C{O_2}\). These hydrides can reduce \(C{O_2}\) at high temperature to produce \({O_2}\).
Hydrogen
27679
Metals of groups \(7, 8\) and \(9\) do not form metallic hydrides. This is termed as
1 Hydride gap
2 Hydride shift
3 Anhydride
4 Dehydride
Explanation:
Metals of groups \(7,8\) and \(9\) do not from metallic hydrides. This is termed as hydride gap.