Fill in the right answer

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.

The d-And-f-Block Elements

Fill In the Blanks

251.

Colour exhibited by the transition element cations in the _________ of the absorbed wavelength.

157 Views

252.

The general configuration of the last two energy levels of d-block elements is __________.

105 Views

253.

There are __________ elements belonging to 3d series.

167 Views

254. The highest oxidation state in 3d series is shown by an element with atomic number ___________.

199 Views

255.

The most stable oxidation state for lanthanides is _________.

117 Views

256.
Lanthanoid contraction results in the comparable ________ of Zr and Hf.

size

116 Views

True Or False

257. State whether the following statements are True or False:

All the transition elements have unfilled d-orbitals.

Iron belongs to 3d series of transition elements.

Ferric iron has a half-filled 3d subshell.

Steel is an interstitial compound.

Zn, Cd, Hg are not considered as true transition metals as their d subshell is full.

138 Views

258. State whether the following statements are True or False:

The general electronic configuration of d-block elements is (n – 1)^{1– 8} ns^1–2.

Pd is called a transition element.

Zn, Cd and Hg are harder and non-volatile metals.

The E° value of Zn²⁺/Zn and Mn²⁺/Mn are quite high.

The common symbol used for lanthanoids is Lu.

118 Views

Multiple Choice Questions

259.

Transition elements are

s-block
p-block
d-block
None of the above
None of the above

180 Views

260.

An atom with atomic number 21 belongs to the category of

s-block elements
p-block elements
d-block elements
f-block elements

152 Views