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 |
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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%
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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 |
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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 |
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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 |
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The compounds of Ca are-

(1) Paramagnetic and colourless

(2) Paramagnetic and coloured

(3) Diamagnetic and coloured, provided their anions are also coloured

(4) Diamagnetic and colourless, provided their anions are also colourless

Subtopic:  Physical Properties |
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Calcium hydride can be obtained by heating : 

1. Calcium oxide with hydrogen.

2. Calcium oxide with hydrogen under pressure.

3. Calcium with hydrogen under pressure.

4. Calcium with hydrogen at a very low temperature.

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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Mark the incorrect statement:

(1) Alkali metals are strong reducing agents.

(2) The electropositive nature of alkali metals decreases with increase in atomic number.

(3) Alkali metals have relatively low electronegativity values.

(4) On burning in oxygen lithium forms only the monoxide while other alkali metals form peroxides and or superoxides.

Subtopic:  Physical Properties |
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A hydrated water soluble salt, A in solution gives a turbidity with dilute hydrochloric acid evolving a gas with a suffocation odour. The solution of A decolourises lodine solution. A is likely to be

1. KI                                         

2. Na2SO4.10H2O

3. Na2S2O3.5H2O                   

4. AgNO3

Subtopic:  Physical Properties |
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