Free MCQs & Online Quiz Practice for Exams

Q: The outer electronic configuration of Cu⁺ is [Ar]3d¹⁰; aqueous solutions of copper(I) compounds are: (2018 ETEA)

A) Blue

B) Greenish blue

C) Bluish green

D) Colourless

Q: Which of the following is a chelating ligand: (2018 ETEA)

A) CH₃COO⁻

B) (CH₂)₂(NH₂)₂

C) SCN⁻

D) NO₂⁻

Q: The manganese compound with zero reducing power is: (2018 ETEA)

A) KMnO₄

B) MnO₂

C) MnCl₂

D) Mn₂(SO₄)₃

Q: In potassium hexacyanoferrate(III) K₃[Fe(CN)₆], the coordination number of Fe is: (2018 ETEA)

A) 9

B) 3

C) 6

D) (missing)

Q: When Na₄[Fe(CN)₆] is dissolved in water, it furnishes how many ions per molecule? (2018 ETEA)

A) 10

B) 2

C) 6

D) 5

Q: Ethylenediaminetetraacetate (EDTA) is: (2018 ETEA)

A) Didentate

B) Tridentate

C) Tetradentate

D) Hexadentate

Q: Which ions are used as catalyst in the reaction between persulfate ions and iodide ions? (2018 ETEA)

A) Lead

B) Iron

C) Copper

D) Chromium

Q: Which element can form the more acidic oxide? (2018 ETEA)

A) Sc

B) Mn

C) V

D) Ti

Q: Carat is the unit of purity of gold; 18 carat gold contains approximately what percent gold? (2018 ETEA)

A) 50–60%

B) 70–75%

C) 90–95%

D) 99%

Q: Acidic KMnO₄ cannot be used for the estimation of: (2018 ETEA)

A) Ferrous ions

B) Oxalic acid

C) Potassium iodide

D) Ferric ions

Q: A compound X is orange-red; when KOH(aq) is added it turns yellow. Compound X is: (2018 ETEA)

A) Na₂CrO₄

B) K₂Cr₂O₇

C) KMnO₄

D) PbS

Q: Coordination number of [Co(en)₂Cl₂] is: (2018 ETEA)

A) 2

B) 6

C) 4

D) None

Q: Electronic configuration of chromium (Z = 24) is: (2020 NMCAT/ETEA)

A) [Ar]3d⁴4s²

B) [Ar]3d⁵4s²

C) [Ar]3d⁵4s¹

D) [Ar]3d⁰4s²

Q: In the 3rd transition series, paramagnetic behaviour is maximum for Mn²⁺ and which ion?: (2020 NMCAT/ETEA)

A) Cr³⁺

B) Ti³⁺

C) V³⁺

D) Zn²⁺

Q: The transition element which doesn't show variable valency is: (2020 NMCAT/ETEA)

A) Cu

B) Sc

C) Zn

D) Cr

Q: The charge on the complex ion [Co(NH₃)₅SO₄] is: (2020 NMCAT/ETEA)

A) +4

B) -4

C) +2

D) -2

Q: The oxidation state of platinum in [Pt(NH₃)₄(NO₂)Cl]SO₄ is: (2018 ETEA)

A) III

B) II

C) 0

D) IV

Q: Oxidation number of nickel in Ni(CO)₄ is: (2018 ETEA)

A) +4

B) +3

C) 0

D) -2

Q: Choose the correct name of the compound given below? Ag–C≡C–Ag (ETEA 2016)

A) Silver carbide

B) Alkynide

C) Silver dicarbide

D) None

Q: Select the reaction when the supply of air is very limited: (ETEA 2016)

A) CH₄ + 2O₂ → CO₂ + 2H₂O + Heat

B) 2CH₄ + 3O₂ → 2CO₂ + 4H₂O + Heat

C) CH₃–CH₃ + 7O₂ → 6CO₂ + 6H₂O + Heat

D) 2CH₄ + O₂ → 2C + 4H₂O + Heat