Important Questions of Classification of Elements and Periodicity in Properties Chemistry | Zigya

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement
311.

Assertion : Barium is not required for normal biological function in human.

Reason : Barium does not show variable oxidation state.

  • If both assertion and reason are true and the reason is the correct explanation of the assertion.

  • If both assertion and reason are true and the reason is not the correct explanation of the assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


312.

The atomic number of cerium (Ce) is 58. The correct electronic configuration of Ce3+ ion is.

  • [Xe] 4f1

  • [Kr] 4f1

  • [Xe] 4f13

  • [Kr] 4d1


313.

The decreasing order of basic character of K2O, BaO, CaO and MgO is

  • K2O > BaO > CaO > MgO

  • K2O > CaO > BaO > MgO

  • MgO > BaO > CaO > K2O

  • MgO > CaO > BaO > K2O


314.

Which of the following is correct?

  • Radius of Ca2+ < Cl- < S2-

  • Radius of Cl- < S2- < Ca2+

  • Radius of Cl- = S2- = Ca2+

  • Radius of S2- < Cl- < Ca2+


Advertisement
315.

Metal ion responsible for the Minimata disease is

  • CO2+

  • Hg2+

  • Cu2+ 

  • Zn2+


316.

If the first ionization energy of H atom is 13.6 eV, then the second ionization energy of He atom is:

  • 27.2 eV

  • 40.8 eV

  • 54.4 eV

  • 108.8 eV


317.

Which one of the following has the lowest ionisation energy?

  • 1s2 , 2s2 , 2p6

  • 1s2 , 2s2 , 2p6 , 3s1

  • 1s2 , 2s2 , 2p5

  • 1s2 , 2s2 , 2p3


318.

Which of the following statements about the interstitial compounds is incorrect?

  • They retain metallic conductivity

  • They are chemically reactive

  • They are much harder than the pure metal

  • They have higher melting points than the pure metal


Advertisement
319.

In Periodic Table, the basic character of oxides

  • increases from left to right and decreases from top to bottom

  • decreases from right to left and increases from top to bottom

  • decreases from left to right and increases from top to bottom

  • decreases from left to right and increases from bottom to top


320.

In haemoglobin, the metal ion present is

  • Fe2+

  • Zn2+

  • Co2+

  • Cu2+


Advertisement