An amphoteric oxide among the following is-

1. CaO                                                     

2. SrO

3. BeO                                                     

4. MgO

Subtopic:  Physical Properties |
 89%
From NCERT
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A colourless salt among the following that gives violet colour to Bunsen flame is -

1. Na2CO3

2. K2CO3

3. Cu(OH)2

4. MgCO3

Subtopic:  Physical Properties |
 85%
From NCERT
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The polarising power of Mg is close to that of –

1. Na                                       

2. Cs

3. Li                                         

4. K

Subtopic:  Physical Properties |
 83%
From NCERT
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The incorrect statement among the following regarding Lithium is that-

1. The hydroxide, carbonate and nitrate decompose to give the oxide on heating.

2. It is the most electronegative element of group IA.

3. The hydrogen carbonate cannot be isolated as a stable solid.

4. It forms superoxide.

Subtopic:  Physical Properties |
 82%
From NCERT
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The strongest factor responsible for reducing action of Li metal in an aqueous solution is :

1. Sublimation enthalpy .         

2. Ionisation enthalpy.

3. Hydration enthalpy .             

4. Electron-gain enthalpy.

Subtopic:  Physical Properties |
 80%
From NCERT
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The incorrect statement among the following is-

1. Lithium is the strongest reducing agent.

2. Density of potassium is more than sodium.

3. Cs are used in devising photoelectric cells.

4. All alkali metals give a blue solution in liquid ammonia.

Subtopic:  Physical Properties |
 74%
From NCERT
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The correct relation about the density of Na and K is 

1. Na > K                                                     

2. Na = K

3. K > Na                                                     

4. Li > K

Subtopic:  Physical Properties |
 78%
From NCERT
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Property of the alkaline earth metals that increases with their atomic number is -

1. Solubility of their hydroxides in water.

2. Solubility of their sulphates in water.

3. Ionisation energy.

4. Electronegativity.

Subtopic:  Physical Properties |
 74%
From NCERT
NEET - 2010
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The incorrect statement among the following is-

1. Ionisation enthalpy of alkaline earth metals is higher than alkali metals.
2. Alkaline earth metal oxides are more basic than alkali metal oxides.
3. Alkaline earth metal hydroxides are less basic and less stable than alkali metal hydroxides.
4. Solubility of Alkaline earth metals and alkali metal hydroxide increases down the group.

Subtopic:  Physical Properties |
 70%
From NCERT
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 Alkali metal with the lowest melting point is -

1. Na

2. K

3. Rb

4. Cs

Subtopic:  Physical Properties |
 67%
From NCERT
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