मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

Assertion (A): Beryllium carbonate is kept in the atmosphere of carbon dioxide. Reason (R): Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide.

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प्रश्न

Assertion (A): Beryllium carbonate is kept in the atmosphere of carbon dioxide.

Reason (R): Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide.

पर्याय

  • Both A and R are correct and R is the correct explanation of A.

  • Both A and R are correct but R is not the correct explanation of A.

  • Both A and R are not correct.

  • A is not correct but R is correct.

MCQ
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उत्तर

Both A and R are correct and R is the correct explanation of A.

Explanation:

Alkaline earth metals are stable at room temperature except beryllium carbonate. It decomposes to give beryllium oxide and carbon dioxide. It is kept in an atmosphere of carbon dioxide so that equilibrium shifts to the right. The reaction is shown below. 

\[\ce{BeCO3 ⇌ BeO + CO2}\]

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 10: The s-block Elements - Multiple Choice Questions (Type - I) [पृष्ठ १३१]

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एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 11
पाठ 10 The s-block Elements
Multiple Choice Questions (Type - I) | Q 45 | पृष्ठ १३१

संबंधित प्रश्‍न

Discuss the general characteristics and gradation in properties of alkaline earth metals.


Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?


Which one of the alkaline earth metal carbonates is thermally the most stable?


Discuss briefly the similarities between beryllium and aluminium.


Substantiate Lithium fluoride has the lowest solubility among group one metal fluorides.


Alkaline earth metal (A), belongs to 3rd period reacts with oxygen and nitrogen to form compound (B) and (C) respectively. It undergoes metal displacement reaction with AgNO3 solution to form compound (D). Identify A, B, C and D.


The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.


When sodium is dissolved in liquid ammonia, a solution of deep blue colour is obtained. The colour of the solution is due to ______.


Identify the correct formula of halides of alkaline earth metals from the following.

(i) BaCl2.2H2O

(ii) BaCl2.4H2O

(iii) CaCl2.6H2O

(iv) SrCl2.4H2O


Why are BeSO4 and MgSO4 readily soluble in water while CaSO4, SrSO4 and BaSO4 are insoluble?


What is the structure of BeCl2 molecule in gaseous and solid state?


Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is ______.


Given below are two statements:

Statement I: Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.

Statement II: Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.

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


MgBr2 and Mgl2 are soluble in acetone because of ______.


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