Consider the following statements and pick out the correct one.

(1) The solubility, thermal stability, and the basic character of the hydroxides of alkaline earth

      metals increases from MgOH2 to BaOH2.

(2) The dehydration of hydrated chlorides, bromides, bromides and iodides of Ca, Sr and Ba can be

      achieved on heating.

(3) The chlorides of both beryllium and aluminium are soluble in organic solvents and are strong

      Lewis acids.

 

(1) (1) and (2) only                                     

(2) (1) and (3) only

(3) (1), (2) and (3)                                     

(4) none

Subtopic:  Chemical Properties |
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A metal [X] heating on nitrogen gas gives [Y]. [Y] on treatment with H2O gives a colourless gas which when passed through CuSO4 solution gives a blue colour. [Y] is-

1. MgNO32                                     

2. Mg3N2

3. NaN3                                             

4. MgO

Subtopic:  Compounds of Ca and Na -Preparations, Properties & Uses |
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Assertion : Beryllium resembles aluminium.

Reason : : Charge / radius of Be2+ ion is nearly the same as that of the Al3+ ion.

  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 |
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Assertion : As the electropositive character increases down the group, the stability of carbonates and hydrogen carbonates of alkali metals increases.

Reason : Lithium carbonates is not so stable to heat ; lithium being very small in size polarizes a large CO32-ion leading to the formation of more stable Li2O and CO2.

  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 |
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The following is the correct order of chemical reactivity with water according to electrochemical series-

1. K>Mg>Cu>Zn                                     

2. K>Mg>Zn>Cu

3. Cu>Zn>K>Mg                                     

4. Mg>K>Cu>Zn

Subtopic:  Chemical Properties |
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In the reaction M+O2MO2 (superoxide) the metal is -

1. Li                 

2. Na

3. K                 

4. Ba 

Subtopic:  Chemical Properties |
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The reaction of sodium with water is highly exothermic. The rate of reaction can be lowered by-

(1) Decreasing the temperature 

(2) Mixing with alcohol

(3) Mixing with acetic acid 

(4) Making an amalgam

Subtopic:  Physical Properties |
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Sodium reacts with water less vigorously than potassium because-

1. It has a higher atomic weight.

2. It is less electropositive .

3. It is more electronegative. 

4. It is a metal .

Subtopic:  Chemical Properties |
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The correct relation about the density of Na and K is 

1. Na > K                                                     

2. Na = K

3. K > Na                                                     

4. Li > K

Subtopic:  Physical Properties |
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Which of the following does not give an oxide on heating-

(1) MgCO3                                                   

 

(2) Li2CO3

(3) ZnCO3                                                   

 

(4) K2CO3 

Subtopic:  Chemical Properties |
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