Which of the following compounds are readily soluble in water?

a.  BeSO4

b.  MgSO4

c.  BaSO4

d.  SrSO4

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Preparations, Properties & Uses of S Block Elements |
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When zeolite, which is hydrated sodium aluminium silicate is treated with hard water, the sodium ions are exchanged with which of the following ion(s)?

a.  H+ ions

b.  Mg2+ ions

c.  Ca2+ ions

d.  SO42- ions

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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Choose the correct statements from the following.

a.  Beryllium is not readily attacked by acids because of the presence of an oxide film on the surface of the metal

b.  Beryllium sulphate is readily soluble in water as the greater hydration enthalpy of Be2+ overcomes the lattice enthalpy factor

c.  Beryllium exhibits coordination number more than four

d.  Beryllium oxide is purely acidic in nature

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Preparations, Properties & Uses of S Block Elements |
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Match the elements given in Column I with the properties mentioned in Column II.

Column I

Column II

A. Li

1. Insoluble sulphate 

B. Ca

2. Strongest monoacidic base

C. Na

3. Most negative EΘ value among alkali metals

D. Ba 

4. Insoluble oxalate 

 

Codes

          A           B          C           D

1.       3          2          4           1

2.       1          2           3           4

3.       1          4           3           2

4.       3          4           2           1

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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Match the elements given in Column I with the color they impart to the flame given in Column II.

Column I

Column II

A. Cs

1. Apple green

B. Sr

2. Blue

C. Ba

3. Brick red

D. Ca

4. Crimson red

Codes

          A           B          C           D         

1.       1          4          2            3          

2.       2          4           1           3          

3.       1          4           3           2          

4.       4          1           3           2         

Subtopic:  Physical Properties |
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Assertion: The carbonate of lithium decomposes easily on heating to form lithium oxide and CO2.

Reason: Lithium being very small in size polarises large carbonate ions leading to the formation of more stable Li2O and CO2.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true.

Subtopic:  Chemical Properties |
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Assertion: Beryllium carbonate is kept in the atmosphere of carbon dioxide.

Reason: Beryllium carbonate is unstable and decomposes to give beryllium oxide and carbon dioxide.

1.  Both assertion and reason are true and the reason is the correct explanation of assertion.

2.  Both assertion and reason are true and the reason is not the correct explanation of assertion.

3.  Assertion is true but the reason is false.

4.  Assertion is false but the reason is true. 

Subtopic:  Chemical Properties |
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The alkali metals have low melting point. Which of the following alkali metal is expected to melt if the room temperature rises to 30°C?

1. Na

2. K

3. Rb

4. Cs

Subtopic:  Preparations, Properties & Uses of S Block Elements |
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The alkali metal that reacts with water least vigorously is -

1. Li

2. Na

3. K

4. Cs

Subtopic:  Chemical Properties |
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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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