Chemistry – Class 12 Practice Test 5

1. If the complex ion is cationic, the name of the metal ends with suffix -ate.

True

False

2. Which of the following metal is used as a thermometric liquid?

Potassium

Iron

Mercury

Copper

3. The compound tetraamminecopper(II) sulphate, or [Cu(NH₃)₄]SO₄.5H₂O, a double salt.

True

False

4. The term inside the parenthesis in the formula of mercury(I) tetrathiocyanato-S-cobaltate(III) is _________

NCS

SCN

5. What is the sum of the oxidation number of cobalt in [Co(H₂O)(CN)(en)₂]²⁺and [CoBr₂(en)₂]⁺?

6. Which of the following is true regarding a charged coordination entity?

The charge of the complex ion is written in parenthesis while naming the entity

The charge is indicated as a subscript outside the square bracket on the right

The sign of the charge is written after the number

The charge on the complex ion is depicted along with the counter ion

7. Which of the following has the highest density?

8. Which of the following cannot be a ligand?

NH₃

Ni²⁺

H₂O

Cl^-

9. Which of the following element belongs to the third transition series of the periodic table?

10. The oxidation number of the central metal ion in a coordination entity is the charge it would carry if all the _________ are removed along with the electron pairs that are shared with it.

lewis acids

anions

ligands

didentate ligands