Magnesium hydride can be prepared by the action of-

(1) Lithium hydride on magnesium chloride

(2) Aluminium hydride on magnesium chloride

(3) Lithium aluminium hydride on magnesium chloride

(4) Lithium magnesium hydride on lithium chloride

Subtopic:  Chemical Properties |
 65%
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Which of the following is not the characteristics of alkali metals –

1. Low m.p.                                         

2. Low electronegativity

3. High ionisation energies

4. Their ions are isoelectronic with noble gases

Subtopic:  Chemical Properties |
 73%
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Calcium can be obtained by the electrolysis of-

1. CaCl2 and CaF2                     

2. CaOH2

3. CaCl2                                   

4. CaF2

Subtopic:  Physical Properties |
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The incorrect statement regarding Be(II group) is -

1. It forms an ionic carbide.

2. Its carbonate decomposes on heating.

3. Its halides are covalent.

4. It is easily attacked by water.

Subtopic:  Physical Properties |
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The atomic volumes of alkali metals are in the order-

(1) Li > Na > K > Rb > Cs                           

(2) Li > Na = K > Rb > Cs

(3) Li < Na < K < Rb < Cs                           

(4) Li < Na < K < Rb = Cs

Subtopic:  Physical Properties |
 67%
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Lithium has the minimum tendency to form Li+ ion. The aqueous solution of lithium is the:

1. Strongest reducing agent.                      

2. Poorest reducing agent.

3. Strongest oxidising agent.                

4. Poorest oxidising agent.

Subtopic:  Physical Properties |
 80%
From NCERT
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Alkali metals show-

(1) Only +1 oxidation state

(2) Only –1 oxidation state

(3) +1 and +2 oxidation states

(4) –1 and –2 oxidation states.

Subtopic:  Physical Properties |
 92%
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Considering greater polarisation in LiCl compared to that in NaCl, which of the following statement is wrong –

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

(2) LiCl dissolves more in organic solvent than NaCl

(3) LiCl will ionise in water more than NaCl

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

Subtopic:  Physical Properties |
 57%
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When heated in steam, Mg burns brilliantly producing-

(1) MgOH2                               

(2) MgO and H2

(3) MgO and O2                         

 

(4) MgO and O3

Subtopic:  Physical Properties |
 56%
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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 –

(1) Be2+                                         

(2) Ba2+

(3) Pb2+                                         

(4) Ca2+

Subtopic:  Physical Properties |
 81%
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