Potassium is kept-

1. Under cold water.                                 

2. In ammonia.

3. In alcohol.                                         

4. In kerosene.

Subtopic:  Physical Properties |
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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 |
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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 |
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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 |
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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 |
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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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