Which of the following compounds decomposes on heating similar to LiNO3.

(1) BaNO32                               

(2) SrNO32

(3) MgNO32                               

(4) All

Subtopic:  Chemical Properties |
 59%
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Solubility of sulphates in water decreases from MgSO4 to BaSO4. It is due to the fact that –

(1) Ionic nature increases

(2) Size of M2+ ion increases

(3) Lattice energy decrease

(4) Hydration enthalpy of M2+ ions decreases

Subtopic:  Physical Properties |
 72%
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In the Solvay process of manufacture of sodium carbonate, the raw materials used are :

1. Aqueous NaOH, NH3 and CO2

2. Molten NaOH, NH3 and CO

3. Brine NaCl, NH3 and CO

4. Brine NaCl, NH3 and CO2

Subtopic:  Preparations, Properties & Uses of S Block Elements |
 73%
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A blue coluored solution of an alkali metal in liq NH3 is due to the presence of -

1. M-atoms.                                         

2. M+ ions .

3. Solvated anions  .                           

4. Solvated electrons.

Subtopic:  Chemical Properties |
 80%
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Alkali metal ions are- 

1. Diamagnetic and coloured.

2. Diamagnetic and colourless.

3. Paramagnetic and coloured.

4. Paramagnetic and colourless.

Subtopic:  Physical Properties | Compounds of Ca and Na -Preparations, Properties & Uses |
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A compound X on heating gives a colourless gas. The residue is dissolved in water to obtain Y. Excess CO2 is bubbled through an aqueous solution of Y, and Z is formed. Z on gentle heating gives back X. The compound X is-

1. CaCO3                                           

2. Na2CO3

3. CaSO4.2H2O                                 

4. K2CO3

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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Magnesia can be prepared by -

1. Burning Mg in air.

2. Heating hydroxide, nitrate, sulphate or carbonate of magnesium.

3. Heating Mg in steam.

4. All of the above.

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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A compound insoluble in acetic acid is  -

1. Calcium oxide.                    

2. Calcium carbonate.

3. Calcium oxalate.                      

4. Calcium hydroxide.

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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Assertion :  LiF is almost insoluble in water

Reason :  LiCl is soluble not only in water but also in acetone.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Physical Properties |
 63%
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Assertion : s-block elements do not occur free in nature

Reason:  s-block elements are highly electropositive in nature.

1. Both A and R are true and R is the correct explanation of A.

2. Both A and R are true, but R is not the correct explanation of A.

3. A is true, but R is false.

4. Both A and R are false.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Physical Properties |
 78%
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