The oxidation state of potassium in KO2 is-

1. +2
2. +1
3. 0
4. +4

Subtopic:  Reasoning Questions |
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Consider the following data
Eo
Cl2/Cl = +1.36,  Eo I2/I =+ 0.53,  Eo  Ag+ /Ag = +0.79,  Eo Na+/Na = –2.71 and  Li+ /Li is – 3.04.
Arrange the following ionic species in decreasing order of reducing strength: 


I, Ag, Cl, Li, Na.

1. Li > Na > I > Ag > Cl

2. Cl > Na > I > Ag > Li

3. Li < Na < I < Ag < Cl

4. Li > Na = I > Ag > Cl

Subtopic:  Physical Properties |
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KO2 is paramagnetic in nature ,It is because -
1. K+ ion contains unpaired electron
2. \(O_{2}^{2-}\) ion contains unpaired electron
3. \(O_{2}^{-}\) ion contains unpaired electron in
\( \pi^{*}\) MO
4. \(O_{2}^{-}\) ion contains unpaired electron in \( \pi\) MO

Subtopic:  Preparations, Properties & Uses of S Block Elements |
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The solubility of alkaline earth metal hydroxides in water increases down the group because-

1. Down the group both lattice and hydration energy increase.
2. Down the group lattice energy increases and hydration energy decreases
3. Down the group lattice enthalpy decreases much more than the hydration enthalpy
4. None of the above

Subtopic:  Reasoning Questions |
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The correct statement above the following is -
1. The solubility of alkaline earth metal carbonates and sulphates in water decrease down the group
2. The solubility of alkaline earth metal carbonates increase and sulphates in water decrease down the group
3. The solubility of alkaline earth metal carbonates decreases and sulphates in water increases down the group
4. The solubility of alkaline earth metal carbonates and sulphates in water increases down the group
 

Subtopic:  Reasoning Questions |
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