KCET problems

2328 problems for KCET practice, in Physics, Chemistry, Mathematics and Biology, each with a worked solution. Try each one on paper first, then check your answer.

All SubjectsPhysicsChemistryMathematicsBiologyPython ProgrammingStatistics & Data Science

All LevelsHigh School (9–10)High School (11–12)General

All TopicsStates of MatterMixtures and SolutionsAtoms and MoleculesStructure of the AtomChemical ReactionsAcids, Bases and SaltsMetals and Non-metalsCarbon and Its CompoundsThe Periodic TableChemical BondingChemical ThermodynamicsEquilibriumRedox ReactionsOrganic Chemistry: Some Basic Principles and TechniquesHydrocarbonsSolutionsElectrochemistryChemical KineticsThe d- and f-Block ElementsCoordination Compounds

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Type:AnyConceptualNumerical

1.

The octahedral complex [CoF₆]³⁻ is paramagnetic… New

High School (11–12) · Bonding: Valence Bond and Crystal Field TheoryNEETA-LevelIB+20A-LevelIBStemPy Lab

Medium

2.

The deep blue complex [Cu(NH₃)₄]²⁺ is square planar and paramagnetic… New

High School (11–12) · Bonding: Valence Bond and Crystal Field TheoryNEETA-LevelIB+20A-LevelIBStemPy Lab

Medium

3.

Two complexes of Fe²⁺ each have six identical ligands around the ion… New

High School (11–12) · Bonding: Valence Bond and Crystal Field TheoryNEETA-LevelIB+20A-LevelIBStemPy Lab

Hard

4.

An octahedral complex of a d⁴ ion has Δo = 130 kJ/mol with a weak ligand and Δo = 310 kJ/mol with a… New

High School (11–12) · Bonding: Valence Bond and Crystal Field TheoryNEETA-LevelIB+20A-LevelIBStemPy Lab

Medium

5.

The blue complex [CoCl₄]²⁻ is tetrahedral… New

High School (11–12) · Bonding: Valence Bond and Crystal Field TheoryNEETA-LevelIB+20A-LevelIBStemPy Lab

Medium

6.

A d² ion forms an octahedral complex with Δo = 270 kJ/mol… New

High School (11–12) · Bonding: Valence Bond and Crystal Field TheoryA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Hard

7.

Four aqua complexes are [Sc(H₂O)₆]³⁺, [Zn(H₂O)₆]²⁺, [Cr(H₂O)₆]³⁺ and [Co(H₂O)₆]²⁺… New

High School (11–12) · Bonding: Valence Bond and Crystal Field TheoryNEETA-LevelIB+20A-LevelIBStemPy Lab

Medium

8.

Two complexes of the same metal ion form at 298 K… New

High School (11–12) · Bonding: Valence Bond and Crystal Field TheoryA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

9.

A student dissolves 2.665 g of a chromium chloride hydrate, CrCl₃· 6H₂O, in cold water… New

High School (11–12) · Isomerism in Coordination CompoundsA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

10.

A chemist has 0.0400 mol of each of two ionisation isomers, [Co(NH₃)₅Cl]SO₄ and [Co(NH₃)₅(SO₄)]Cl… New

High School (11–12) · Isomerism in Coordination CompoundsA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

11.

Consider the neutral octahedral platinum(IV) complex [Pt(NH₃)₂Cl₂(OH)₂]… New

High School (11–12) · Isomerism in Coordination CompoundsA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Hard

12.

The complex [Co(NH₃)₃(NO₂)₃] has a fac isomer and a mer isomer… New

High School (11–12) · Isomerism in Coordination CompoundsA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

13.

Only two forms of [Pt(NH₃)₂Cl₂] have ever been made… New

High School (11–12) · Isomerism in Coordination CompoundsA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

14.

Consider octahedral [Co(NH₃)₄(NO₂)(SCN)]⁺… New

High School (11–12) · Isomerism in Coordination CompoundsJEE MainA-LevelIB+20A-LevelIBStemPy Lab

Hard

15.

Here are five complexes, with ox for the bidentate oxalate ion… New

High School (11–12) · Isomerism in Coordination CompoundsA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

16.

A solution of a chiral complex is 80 percent of the (+) form and 20 percent of the (-) form… New

High School (11–12) · Isomerism in Coordination CompoundsA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

17.

The glycinate ion bonds to a metal through its nitrogen and through one oxygen… New

High School (11–12) · Isomerism in Coordination CompoundsA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Hard

18.

Platinum(IV) forms the complex salt [Pt(NH₃)₄Cl₂]Cl₂… New

High School (11–12) · Werner's Theory, Ligands and NomenclatureA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

19.

A compound has the formula CrCl₃· nNH₃. Its molar mass is 243.5 g/mol… New

High School (11–12) · Werner's Theory, Ligands and NomenclatureBoard ExamA-LevelIB+20A-LevelIBStemPy Lab

Hard

20.

Find the oxidation state of the metal in each complex… New

High School (11–12) · Werner's Theory, Ligands and NomenclatureA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

21.

The glycinate ion, H₂N-CH₂-COO⁻, bonds to a metal ion through its nitrogen atom and one oxygen atom… New

High School (11–12) · Werner's Theory, Ligands and NomenclatureBoard ExamA-LevelIB+20A-LevelIBStemPy Lab

Medium

22.

Nickel(II) forms a complex with the EDTA ion, which has a charge of -4 and six donor atoms… New

High School (11–12) · Werner's Theory, Ligands and NomenclatureBoard ExamA-LevelIB+20A-LevelIBStemPy Lab

Hard

23.

Write the formula of each compound. sodium tetrahydroxidozincate(II); hexaaquanickel(II) chloride… New

High School (11–12) · Werner's Theory, Ligands and NomenclatureBoard ExamA-LevelIB+20A-LevelIBStemPy Lab

Medium

24.

Name the complex [Ni(CO)₄], [Pt(NH₃)₂Cl₂] and [Zn(OH)₄]²⁻… New

High School (11–12) · Werner's Theory, Ligands and NomenclatureA-LevelIBAEEE (Amrita)+19A-LevelIBStemPy Lab

Medium

25.

Each of these names has one mistake. Find it and write the correct name… New

High School (11–12) · Werner's Theory, Ligands and NomenclatureBoard ExamA-LevelIB+20A-LevelIBStemPy Lab

Hard