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D-Block Elements: Introd..



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Q1. The main factor for the cause of lanthanide contraction is poorer shielding of 5d electrons by 4f electrons.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q2. Which of the following statement is correct?

(a) The properties of various actinoids are very similar
(b) 4f and 5f orbitals are equally shielded
(c) D-block elements show irregular and erratic chemical properties
(d) 4d and 5d orbitals are equally shielded

Q3. Among d-block elements, the most abundant element belongs to the first transition state.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q4. What is the common oxidation state of scandium? (At. No. of Sc = 21)

(a) 4
(b) 3
(c) 1
(d) 5

Q5. Why does Zinc not show variable valency?

(a) Complete ?d? subshell
(b) Inert pair effect
(c) 4s2 subshell
(d) 4s3 subshell

Q6. Where does the last electron of d-block element go?

(a) nd
(b) (n-1)d
(c) np
(d) (n-1)s

Q7. What is the oxidation state exhibited by actinium?

(a) 4
(b) 1
(c) 2
(d) 3

Q8. Which of the following has the highest atomic number?

(a) Scandium
(b) Titanium
(c) Cadmium
(d) Lanthanum

Q9. Why do transition elements form alloys so easily?

(a) Atomic size
(b) Orbital configuration
(c) Very light
(d) Hard elements

Q10. Which of the following are d-block elements, but not regarded as transition elements?

(a) Ru, Ag, Au
(b) Zn, Ru, Pd
(c) Zn, Cd, Hg
(d) Cd, Rh, Pd


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Highest (+7) Oxidation State Is Shown By

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Highest (+7) Oxidation State Is Shown By

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The Outer Electron Configuration Of Gd (At. No. 64) Is

Modified 309 Year Ago

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309 Year Ago

The Outer Electron Configuration Of Gd (At. No. 64) Is

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A Metal Gets Coated With A Green Basic Carbonate When Exposed At Atmosphere. Metal Is

Modified 4 Year Ago

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4 Year Ago

A Metal Gets Coated With A Green Basic Carbonate When Exposed At Atmosphere. Metal Is

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A Transition Element X Has A Configuration [Ar]3d4 In Its + 3 Oxidation State. Its Atomic Number Is

Modified 238 Year Ago

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238 Year Ago

A Transition Element X Has A Configuration [Ar]3d4 In Its + 3 Oxidation State. Its Atomic Number Is

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The General Electronic Configuration Of Transition Elements Is

Modified 240 Year Ago

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240 Year Ago

The General Electronic Configuration Of Transition Elements Is

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230 views

A Red Solid Is Insoluble In Water. However It Becomes Soluble If

Modified 309 Year Ago

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309 Year Ago

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223 views

The Aqueous Solution Containing Which One Of The Following Ions Will Be Colourless

Modified 238 Year Ago

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238 Year Ago

The Aqueous Solution Containing Which One Of The Following Ions Will Be Colourless

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