The reducing power of a metal depends on various factors. Suggest the factor which makes Li, the strongest reducing agent in aqueous solution.

1. Sublimation enthalpy

2. Ionisation enthalpy

3. Hydration enthalpy

4.  Electron-gain enthalpy

Subtopic:  Preparations, Properties & Uses of S Block Elements |
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Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?

1. MgCO3

2. CaCO3

3. SrCO3

4. BaCO3

Subtopic:  Reasoning Questions |
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Which of the carbonates given below is unstable in air and is kept in CO2 atmosphere to avoid decomposition?

1. BeCO3

2. MgCO3

3. CaCO3

4. BaCO3

Subtopic:  Chemical Properties |
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The least basic metal hydroxide among the following is-

1.  Mg(OH)2

2.  Ca(OH)2

3.  Sr(OH)2

4.  Ba(OH)2

Subtopic:  Physical Properties |
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Some of the Group 2 metal halides are covalent and soluble in organic solvents. Among the following metal halides, the one which is soluble in ethanol is

1. BeCl2 

2.  MgCl2 

3.  CaCl2 

4.  SrCl2 

Subtopic:  Chemical Properties |
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The order of decreasing ionisation enthalpy in alkali metals is

1. Na>Li>K>Rb

2. Rb<Na<K<Li

3. Li>Na>K>Rb

4. K<Li<Na<Rb

Subtopic:  Preparations, Properties & Uses of S Block Elements |
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The solubility of metal halides depends on their nature, lattice enthalpy and hydration enthalpy of the individual ions. Amongst fluorides of alkali metals, the lowest solubility of LiF in water is due to -

1. Ionic nature of lithium fluoride

2. High lattice enthalpy

3. High hydration enthalpy for lithium ion

4. Low ionisation enthalpy of lithium ion

Subtopic:  Reasoning Questions |
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Amphoteric hydroxides react with both alkalies with acids. Which of the following Group 2 metal hydroxides is soluble in sodium hydroxide?

1. Be(OH)2

2. Mg(OH)2

3. Ca(OH)2

4. Ba(OH)2

Subtopic:  Reasoning Questions |
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In the synthesis of sodium carbonate, the recovery of ammonia is done by treating NH4Cl with Ca(OH)2. The by-product obtained in this process is

1. CaCl2

2. NaCl

3. NaOH

4. NaHCO3

Subtopic:  Preparations, Properties & Uses of S Block Elements |
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When sodium is dissolved in liquid ammonia, a solution of deep blue color is obtained. The color of the solution is due to

1. Ammoniated electron

2. Sodium ion

3. Sodium amide

4. Ammoniated sodium ion

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