d and f BLOCK ELEMENTS

With which non-metals do transition metals generally react to form binary compounds?

• Only oxygen and chlorine
• Only carbon and hydrogen
• Oxygen, nitrogen, sulphur, and halogens
• Only sulfur and phosphorus

How do the first series transition metals generally react with mineral acids (excluding copper)?

• They are completely inert
• They are relatively reactive and dissolve
• They only react with concentrated acids
• They form passivating layers

Which of the following is NOT a distinct characteristic imparted by the involvement of (n–1)d electrons in transition elements?

• Variable oxidation states
• Paramagnetic behaviour
• Catalytic properties
• Forming only ionic compounds

What is the reason the loss of a variable number of electrons from (n–1)d orbitals is not energetically unfavourable for transition elements?

• The high electronegativity
• The low atomic radii
• The non-steep increase in successive ionisation enthalpies
• The completely filled d orbitals

How do the successive ionisation enthalpies of transition elements generally change compared to main group elements?

• They increase more steeply
• They do not increase as steeply
• They remain constant
• They decrease