Advertisements
Advertisements
प्रश्न
Assertion (A): Transition metals have high enthalpy of atomisation.
Reason (R): Greater number of unpaired electrons in transition metals results in weak metallic bonding.
पर्याय
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(A) is true, but (R) is false.
(A) is false, but (R) is true.
Advertisements
उत्तर
(A) is true, but (R) is false.
Explanation:
The assertion (A) is true: Transition metals exhibit a high enthalpy of atomization. This is owing to the strong metallic bonds found in these metals.
The reasoning (R) is false: The existence of unpaired electrons in transition metals causes stronger, rather than weaker, metallic bonding. The delocalization of d and s electrons across the metal lattice helps to form strong metallic connections.
APPEARS IN
संबंधित प्रश्न
Give reasons:
Transition metals show variable oxidation states.
Explain briefly how +2 state becomes more and more stable in the first half of the first row transition elements with increasing atomic number?
Write the factors which are related to the colour of transition metal ions.
Complete and balance the following chemical equations
`MnO_4^(-) + H_2O + I^(-) ->`
Match the properties given in Column I with the metals given in Column II.
| Column I (Property) | Column II (Metal) | |
| (i) | An element which can show +8 oxidation state | (a) \[\ce{Mn}\] |
| (ii) | 3d block element that can show | (b) \[\ce{Cr}\] |
| upto +7 oxidation state | (c) \[\ce{Os}\] | |
| (iii) | 3d block element with highest melting point | (d) \[\ce{Fe}\] |
Answer the following question:
Which element of the first transition series has highest third ionisation enthalpy?
Identify the metal and justify your answer.
\[\ce{MO3F}\]
Photographic film and plates have - au essential ingredient of
Which of the following maxm magnetic moment?
Give reasons for the following statement:
Transition metals and most of their compounds show paramagnetic behaviour.
