Chemistry

Question 1

1A typical property of transition elements is that they

Easy

A. are gases B. have only one oxidation state C. form coloured compounds D. do not conduct electricity

Question 2

2Transition metals have

Easy

A. only one oxidation state B. variable oxidation states C. full d-subshells always D. no electrons

Question 3

3Which is a transition element?

Easy

A. calcium B. aluminium C. copper D. sodium

Question 4

4The complex ion [Cu(NH₃)₄]²⁺ has a

Hard

A. red colour B. deep blue colour C. green colour D. colourless appearance

Question 5

5Iron is used as a catalyst in the

Easy

A. fermentation B. electrolysis of brine C. Haber process D. Contact process

Question 6

6Iron can form Fe²⁺ and Fe³⁺ ions. This shows that transition elements have

Easy

A. a single valency B. no electrons C. full d-subshells only D. variable oxidation states

Question 7

7The electron configuration of Fe²⁺ (Fe, Z = 26) is

Hard

A. [Ar] 3d⁴ 4s² B. [Ar] 3d⁵ 4s¹ C. [Ar] 3d⁶ D. [Ar] 4s² 3d⁶

Question 8

8Copper(II) compounds are typically

Easy

A. white B. colourless C. blue or green D. black only

Question 9

9Transition metals often form

Easy

A. white compounds only B. gases C. coloured compounds D. no compounds

Question 10

10Which transition-metal compound is the catalyst in the Contact process for sulphuric acid?

Medium

A. copper(II) sulphate B. iron C. nickel D. vanadium(V) oxide