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

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501.

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


502.

In haemoglobin, the metal ion present is

  • Fe2+

  • Zn2+

  • Co2+

  • Cu2+


503.

Which of the following orders regarding ionisation energy is correct?

  • N > O > F

  • N < O < F

  • N > O < F

  • N < O < F


504.

Identify [A] and [B] in the following

Ac89227 -β [A] -α [B] -α Rn

  • Po, Rn

  • Th, Po

  • Ra, Th

  • Th, Ra


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505.

The electronic configuration 1s2, 2s22p6, 3s23p63d9 represents a

  • metal atom

  • non metal atom

  • non-metallic anion

  • metallic cation


506.

In a given shell the order of screening effect is

  • s > p > d > f

  • s > p > f > d

  • f > d > p > s

  • s < p < d < f


507.

Identify the least stable ion amongst the following.

  • Li-

  • Be-

  • B-

  • C-


508.

The ionisation energy of hydrogen atom is 13.6eV. What will be the ionisation energy of He+?

  • 13.6 eV

  • 54.4 eV

  • 122.4 eV

  • Zero


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509.

Which element has highest electronegativity ?

  • F

  • He

  • Ne

  • Na


510.

The correct order of radii is

  • N <Be <B

  • F-<O2-<N3-

  • Na< Li< K

  • Fe3+< Fe2+< Fe4+


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