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Asked 2 days ago CBSE/Class 11/Science/Chemistry

The alkali metals are low melting. Which of the following alkali metals is expected to melt if the room... read more

The alkali metals are low melting. Which of the following alkali metals is expected to melt if the room temperature rises to 30°C?
(a) Na (b) K (c) Rb (d) Cs read less

Answer

Asked 2 days ago CBSE/Class 11/Science/Chemistry

A chemical A is used for the preparation of washing soda to recover ammonia. When C02 is bubbled through... read more
A chemical A is used for the preparation of washing soda to recover ammonia. When C02 is bubbled through an aqueous solution of A, the solution tons milky. It is used in white washing due to disinfectant nature. What is the chemical formula of A?
(a) Ca(C03)2          
(b) CaO                   
(c) Ca(OH)2
(d) CaC03 read less

Answer

Asked 2 days ago CBSE/Class 11/Science/Chemistry

Dehydration of hydrates of halides of.calcium, barium and strontium, i.e., CaCl2.6H20, BaCl2.2H20, SrCl2.2H20,... read more
Dehydration of hydrates of halides of.calcium, barium and strontium, i.e., CaCl2.6H20, BaCl2.2H20, SrCl2.2H20, can be achieved by heating. These become wet oh keeping in air. Which of the following statements is correct about these halides?
(a) Act as dehydrating agents.
(b) Can absorb moisture from air.
(c) Tendency to form hydrate decreases from calcium to barium.
(d) All of the above. read less

Answer

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Asked 2 days ago CBSE/Class 11/Science/Chemistry

Metallic elements are described by their standard electrode potential, frision enthalpy, atomic size,... read more
Metallic elements are described by their standard electrode potential, frision enthalpy, atomic size, etc. The alkali metals are characterized by which of the following properties?
(a) High boiling point. ‘
(b) High negative standard electrode potential.
(c) High density.
(d) Large atomic size. read less

Answer

Asked 2 days ago CBSE/Class 11/Science/Chemistry

Several sodium compounds find use in industries. Which of the following compounds are used for textile... read more
Several sodium compounds find use in industries. Which of the following compounds are used for textile industry?
(a) Na2C03            
(b) NaHC03            
(c) NaOH               
(d) NaCl read less

Answer

Asked 2 days ago CBSE/Class 11/Science/Chemistry

Name an element’ from Group 2 which forms an amphoteric oxide and awater soluble sulphate.

Answer

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Asked 2 days ago CBSE/Class 11/Science/Chemistry

Discuss the trend of the following: (i) Thermal stability of carbonates of Group 2 elements. (ii) The... read more
Discuss the trend of the following:
(i) Thermal stability of carbonates of Group 2 elements.
(ii) The solubility and the nature of oxides, of Group 2 elements. read less

Answer

Asked 2 days ago CBSE/Class 11/Science/Chemistry

Why are BeS04 and MgS04 readily soluble in water while CaS04, SrS04 and BaS04 are insoluble? read more
Why are BeS04 and MgS04 readily soluble in water while CaS04, SrS04 and BaS04 are insoluble? read less

Answer

Asked 2 days ago CBSE/Class 11/Science/Chemistry

All compounds of alkali metals are easily soluble in water but lithium compounds are more soluble in... read more
All compounds of alkali metals are easily soluble in water but lithium compounds are more soluble in organic solvents. Explain. read less

Answer

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Asked 2 days ago CBSE/Class 11/Science/Chemistry

In the Solvay process, can we obtain sodium carbonate directly by treating the solution containing (NH4)2C03... read more
In the Solvay process, can we obtain sodium carbonate directly by treating the solution containing (NH4)2C03 with sodium chloride? Explain. read less

Answer

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