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 Multiple Choice QuestionsMultiple Choice Questions

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1.

Which one of the alkali metals, forms only the normal oxide, M2O on heating in air?

  • Rb

  • K

  • Li

  • Li

1150 Views

2.

In the replacement reaction



The reaction will be most favourable if M happens to be

  • Na

  • K

  • Rb

  • Rb

1028 Views

3.

Which of the following compounds has the lowest melting point? 

  • CaBr2

  • CaI2

  • CaF2

  • CaF2

496 Views

4.

Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

  • Ca(OCl)2

  • CaO2Cl

  • CaCl2

  • CaCl2

503 Views

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5.

On heating which of the following releases CO2 most easily?

  • K2CO3

  • Na2CO3

  • MgCO3

  • MgCO3

1639 Views

6.

What is the value of electron gain enthalpy of Na+ if IE1 of Na = 5.1 eV?

  • -5.1 eV

  • -10.2 eV

  • +2.55 eV

  • +2.55 eV

594 Views

7.

Match (I) with list (II) for the  compositions of substances and select the correct answer using the code given below the lists.


 

List I (substance)

 

List II Composition

A.

Plaster of Paris

1.

CaSO4.2H2O

B.

Epsomite

2.

CaSO4. ½ H2O

C.

Kieserite

3.

MgSO4. 7H2O

D.

Gypsum

4.

5.

MgSO4.H2O

CaSO4

  • A

    B

    C

    D

    3

    4

    1

    2

  • A

    B

    C

    D

    2

    3

    4

    1

  • A

    B

    C

    D

    1

    2

    3

    5

  • A

    B

    C

    D

    1

    2

    3

    5

437 Views

8.

Property of the alkaline earth metals that increases with their atomic number

  • the solubility of their hydroxides in water

  • the solubility of their sulphates in water

  • ionisation energy 

  • ionisation energy 

553 Views

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9.

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy? 

  • CaSO4

  • BeSO4

  • BaSO4

  • BaSO4

410 Views

10.

In the case of alkali metals, the covalent character decreases in the order

  • MCl> MI>MBr>MF

  • MF> MCl> MBr>MI

  • MF > MCl> MI>MBr

  • MF > MCl> MI>MBr

481 Views

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