Which of the following is not the characteristics of alkali metals –

(A) Low m.p.                                         

(B) Low electronegativity

(C) High ionisation energies

(D) Their ions are isoelectronic with noble gases

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Calcium can be obtained by the electrolysis of-

1. CaCl2 and CaF2                     

2. CaOH2

3. CaCl2                                   

4. CaF2

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Physical Properties & Characteristics
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Ca on exposure in moist air form a layer on surface as-

(A) CaCO3                                             

 (B) CaOH2

(C) CaCO3.CaOH2                               

 (D) CaO

Concept Questions :-

Physical Properties & Characteristics
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Point out the incorrect statement regarding Be (II) group

(A) It forms an ionic carbide

(B) Its carbonate decomposes on heating

(C) Its halides are covalent

(D) It is easily attacked by water

Concept Questions :-

Physical Properties & Characteristics
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The atomic volumes of alkali metals are in the order-

(A) Li > Na > K > Rb > Cs                            (B) Li > Na = K > Rb > Cs

(C) Li < Na < K < Rb < Cs                           (D) Li < Na < K < Rb = Cs

Concept Questions :-

Physical Properties & Characteristics
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Li has the maximum value of ionisation potential among alkali metals i.e. lithium has the minimum tendency to ionise to give Li+ ion. Thus, in aq. solution lithium is-

(A) Strongest reducing agent                       

(B) Poorest reducing agent

(C) Strongest oxidising agent                       

(D) Poorest oxidising agent

Concept Questions :-

Physical Properties & Characteristics
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Alkali metals show-

(A) Only +1 oxidation state

(B) Only –1 oxidation state

(C) +1 and +2 oxidation states

(D) –1 and –2 oxidation states.

Concept Questions :-

Physical Properties & Characteristics
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Considering greater polarisation in LiCl compared to that in NaCl, which of the following statement is wrong –

(A) The m.p of LiCl is lower than that of NaCl

(B) LiCl dissolves more in organic solvent than NaCl

(C) LiCl will ionise in water more than NaCl

(D) Fused LiCl would be less conducing than fused NaCl

Concept Questions :-

Physical Properties & Characteristics
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When heated in steam, Mg burns brilliantly producing-

(A) MgOH2                               

(B) MgO and H2

(C) MgO and O2                         

  (D) MgO and O3

Concept Questions :-

Physical Properties & Characteristics
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A chloride dissolves appreciably in cold water. When placed in a platinum wire in Bunsen flame no distinctive colour is noticed. Which cation could be present –

(A) Be2+                                         

(B) Ba2+

(C) Pb2+                                         

(D) Ca2+

Concept Questions :-

Physical Properties & Characteristics
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