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प्रश्न
Which of the following statements is incorrect?
विकल्प
Li+ has minimum degree of hydration among alkali metal cations.
The oxidation state of K in KO2 is +1
Sodium is used to make Na/Pb alloy
MgSO4 is readily soluble in water
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उत्तर
Li+ has minimum degree of hydration among alkali metal cations.
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संबंधित प्रश्न
Write a balanced equation for the reaction between Na2O and CO2.
For alkali metals, which one of the following trends is incorrect?
In the synthesis of sodium carbonate, the recovery of ammonia is done by treating NH4Cl with Ca(OH)2. The by-product obtained in this process is ______.
Which of the following compounds are readily soluble in water?
(i) BeSO4
(ii) MgSO4
(iii) BaSO4
(iv) SrSO4
Choose the correct statements from the following.
(i) Beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal.
(ii) Beryllium sulphate is readily soluble in water as the greater hydration enthalpy of Be2+ overcomes the lattice enthalpy factor.
(iii) Beryllium exhibits coordination number more than four.
(iv) Beryllium oxide is purely acidic in nature.
Match List-I with List-II.
| List-I | List-II |
| (Metal) | (Emitted light wavelength (nm)) |
| (a) Li | (I) 780.0 |
| (b) Na | (II) 455.5 |
| (c) Rb | (III) 670.8 |
| (d) Cs | (IV) 589.2 |
Choose the most appropriate answer from the options given below:
The metal mainly used in devising photoelectric cells is ______.
The correct order of hydration enthapies of alkali metal ions is ______.
KO2 (potassium super oxide) is used in oxygen cylinders in space and submarines because it ______.
Which element from following is used as moderator in nuclear reactor?
