Transition metals are ____

• metals
• nonmetals
• halogens
• metalloids

Why is zinc not considered a transition metal?

• Zinc is not a transition metal because it gains two 4s electrons to give a 2+ion with full d subshell levels.

• Zinc is not a transition metal because it loses four 4s electrons to give a 4+ion with full d subshell levels.

• Zinc is not a transition metal because it loses two 4s electrons to give a 2+ion with full d subshell levels.

• Zinc is not a transition metal because it gains two 4d electrons to give a 2+ion with full d subshell levels.

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The transition elements form a ________ of about 30 Metals in the________ of the Periodic Table.

• Block & catalysts

• Block & Middle

• Catalysts & Coloured

• High & Middle

Which of the following d-block elements is not a transition element?

• Iron

• Zinc

• Titanium

• Chromium

What is the highest oxidation state of manganese in it's compounds?

• +8

• +7

• +6

• +5

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Which of the following best explains the action of a transition element as homogeneous catalyst?

• It decreases the enthalpy of reaction

• It exhibits a variable oxidation states

• It supplies energy to increase the rate of effective collision

• It supplies electrons to facilitate adsorption through the formation of temporary bonds

Zn²⁺ ions form a white precipitate, Zn(OH)₂, with an aqueous solution of ammonia. The white precipitate dissolves when a NH₄Cl solution is added to it. Which statement explains the observation?

• NH₄⁺ ions decrease the concentration of OH^- ions in the solution

• NH₄⁺ ions increase the solubility product of Zn(OH)₂

• NH₃ molecule is a stronger ligand than OH^- ions

• A soluble ZnCl₂ compound is formed

Which of the followings is a transition element?

• Sc

• Fe

• Zn

• Ca

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Which of the following is not a feature of Transition Element?

• there is a huge change of atomic radii across the period

• can form complex

• usually have higher melting points comparing s-block elements

• have variable oxidation state

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What is the oxidation state of Cu?

• 0

• +2

• +3

• +4

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