An amphoteric oxide among the following is-

1. CaO                                                     

2. SrO

3. BeO                                                     

4. MgO

Subtopic:  Physical Properties |
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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 |
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The largest value of Ksp among the following is -

1. BeSO4                                           

2. MgSO4

3. CaSO4                                       

4. BaSO4

Subtopic:  Physical Properties |
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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 |
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The incorrect statement among the following is-

1. Alkali metals are more electropositive than alkaline earth metals.

2. Alkaline earth metals are denser and harder than alkali metals.

3. An alkali metal's electronic configuration is ns1 and an alkaline earth metal's electronic configuration is ns2

4. The first IP of alkali metals is more than that of alkaline earth metals.

Subtopic:  Physical Properties |
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Potassium is kept-

1. Under cold water.                                 

2. In ammonia.

3. In alcohol.                                         

4. In kerosene.

Subtopic:  Physical Properties |
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Nitrolim (a nitrogenous fertilizer) is a mixture of-

1. Calcium carbide and calcium cyanamide.

2. Calcium oxide and calcium carbide.

3. Calcium cyanamide and carbon.

4. Calcium oxide and carbon.

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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The strongest base among the following is-

1. AlOH3                                   

2. MgOH2

3. CaOH2                                 

4. BaOH2

Subtopic:  Preparations, Properties & Uses of S Block Elements | Compounds of Ca and Na -Preparations, Properties & Uses |
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Ca, on exposure of the moist air, forms a layer on its surface as : 

1. CaCO3                                             

2. CaOH2

3. CaCO3.CaOH2                               

4. CaO

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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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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