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Which of the following statements is incorrect? - Chemistry

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प्रश्न

Which of the following statements is incorrect?

पर्याय

  • 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

MCQ
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उत्तर

Li+ has minimum degree of hydration among alkali metal cations.

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Group 1 Elements - Alkali Metals
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 5: Alkali and Alkaline Earth Metals - Evaluation [पृष्ठ १५०]

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सामाचीर कलवी Chemistry - Volume 1 and 2 [English] Class 11 TN Board
पाठ 5 Alkali and Alkaline Earth Metals
Evaluation | Q I. 2. | पृष्ठ १५०

संबंधित प्रश्‍न

Write a balanced equation for the reaction between Na2O and CO2.


Alkali metals react with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously?


Metals form basic hydroxides. Which of the following metal hydroxide is the least basic?


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 ______.


By adding gypsum to cement


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.


When heated in air, the alkali metals form various oxides. Mention the oxides formed by Li, Na and K.


Ions of an element of group 1 participate in the transmission of nerve signals and transport of sugars and aminoacids into cells. This element imparts yellow colour to the flame in flame test and forms an oxide and a peroxide with oxygen. Identify the element and write chemical reaction to show the formation of its peroxide. Why does the element impart colour to the flame?


The correct order of hydration enthapies of alkali metal ions is ______.


Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Lithium salts are hydrated.

Reason (R) : Lithium has higher polarising power than other alkali metal group members.

In the light of the above statements, choose the most appropriate answer from the options given below :


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