Alkaline earth metals form hydrated crystalline solids such as MgCl2.6H2O, CaCl2.6H2O. This is due to-

(1) Smaller ionic size

(2) Increased charge on ions

(3) Higher hydration enthalpies

(4) High oxidation potential

Subtopic:  Chemical Properties |
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The commercial salt is purified by passing-

(1) H2S gas through an alkaline solution of salt

(2) HCl gas through a saturated solution of salt

(3) H2 gas through a solution of salt

(4) Cl2 gas through a saturated solution of salt

Subtopic:  Physical Properties |
 63%
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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 |
 52%
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Potassium is kept-

1. Under cold water.                                 

2. In ammonia.

3. In alcohol.                                         

4. In kerosene.

Subtopic:  Physical Properties |
 90%
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KOH can be prepared- 

(1) By the electrolysis of potassium chloride solution

(2) By the action of barium hydroxide on potassium sulphate

(3) By the action of lime on potassium chloride

(4) By the action of lime on potassium carbonate.

Subtopic:  Physical Properties |
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Magnesium can be prepared by heating-

(1) MgCl2 with CaO at 1775 K

(2) MgCl2 with CaC2 at 1775 K

(3) MgCl2 with CaOH2 under pressure

(4) MgO with CaC2 at ordinary temperature

Subtopic:  Chemical 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 |
 81%
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When magnesium ribbon is heated to redness in an atmosphere of nitrogen and subsequently cooled with water, the gas evolved is-

(1) N2                                               

(2) NH3

(3) H2                                               

(4) CO2

Subtopic:  Chemical Properties |
 59%
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The ion of which of the following metals has least ionic conductivity in the aqueous solution-

(1) Lithium                                           

(2) Sodium 

(3) Potassium                                         

(4) Rubidium

Subtopic:  Physical Properties |
 85%
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