All Free Chemistry MCQs with Answers

• A. Triammine chlorobromonitroplatinum (IV) Chlorate
• B. Triammine chlorobromonitroplatimate (IV) Chloride
• C. Triammine bromochloronitroplatinum (IV) Chloride
• D. Triammine nitrochlorobromoplatninum (III) Chloride

Explanation: We need to follow the alphabetical order while naming the compound. The oxidation number of metal is +4.

• A. 5d6
• B. 3d9
• C. 3d8
• D. 3d7

Explanation: The valence electronic configuration of Cu+2 is derived from the neutral atom of copper (Cu), which has an atomic number of 29.

• A. 58
• B. 48
• C. 30
• D. 25

Explanation: This is a factual recall question. There are 58 transition metals in the periodic table of elements, of which 30 are outer transition…

• A. sp3d
• B. spd6
• C. sp3d2
• D. sp2d3

Explanation: The octahedral geometry of the complex [Co(NH3)6]2+ is associated with the hybridization of the central cobalt (Co) atom.

• A. CH3NH2
• B. OH-
• C. Cl-
• D. NH4+

Explanation: Ligand is a species that donates a lone pair of electrons by forming a dative coordinate bond with a central metal atom/ion.

• A. Hg
• B. Pb
• C. Fe
• D. As

Explanation: Mostly, bullets are made of lead which is toxic. Lead bullet fragments left in contact with body fluids are capable of solubilizing lead.

• A. Potassium tetrahydroxyzinc (II)
• B. Potassium tetrahydroxozincate (II)
• C. Potassium tetrahydroxyzincate (VI)
• D. Potassium hydroxyzinc (II)

Explanation: The chemical name of K2[Zn(OH)4] is derived by naming the cation first, which is Potassium.

• A. All paired electrons
• B. All unpaired electrons
• C. Few unpaired electrons.
• D. Unequal electrons and protons

Explanation: Paramagnetic elements are those with one or more unpaired electrons. These unpaired electrons create a net magnetic moment, making the…

• A. Trichlorotetra amine chromium (III)
• B. Tetraamminedichlorochromium (III) chloride
• C. Dichloro Tetra ammonia chromium (III) chloride
• D. Dichlorotetra amine chromate (III) chloride

Explanation: The correct IUPAC name for the complex [Cr(NH3)4Cl2]Cl is Tetraamminedichlorochromium (III) chloride.

• A. dxy, dyz
• B. dyz, dzx
• C. dx2-y2, dz2
• D. dx2, d

Explanation: In an octahedral crystal field, the five degenerate d-orbitals split into two distinct groups due to ligand interactions: the t2g set…

• A. Cu, Ag, Au
• B. Zn, Cd, Hg
• C. Au, Ag, Zn
• D. Li, Na, K

Explanation: The coinage metal comprise, at a minimum, those metallic chemical elements which have historically been used as components in alloys used…

• A. Inner transition elements
• B. Outer transition metals
• C. Both
• D. None

Explanation: The f block elements are the lanthanides and actinides and are called the 'inner transition' elements because of their placement in the…

• A. Potassium tetra cyano cuprate
• B. Coordination number is 2
• C. The ligand is positively charged
• D. Central atom is present in the anionic sphere

Explanation: The central atom 'Cu' is present in the complex that is forming the anion part of the given salt.

• A. Unity
• B. Positive
• C. Zero
• D. Negative

Explanation: The oxidation number of an element in its free state is always zero.

• A. 5d7
• B. 4d9
• C. 5d8
• D. 5d10

Explanation: C is the correct answer. The electronic configuration of Au in its neutral state is [Xe] 4f14 5d10 6s1.

• A. Color
• B. Complex formation
• C. Use as catalyst
• D. All of these

Explanation: Correct option is D. The answer is all of these. Transition metals are known for their characteristic colors, their ability to form…

• A. More melting point
• B. More electrons
• C. Variable oxidation state
• D. Higher binding energies

Explanation: Correct option is D. The d-orbital of transition elements which contain the unpaired electrons may overlap and form covalent bonds.

• A. Zn, Cd, Hg
• B. Fe, Ru, Os
• C. Mn, Te, Re
• D. Cr, Mo, W

Explanation: Correct option is D. Transition elements of group VI are: chromium (Cr), molybdenum (Mo), tungsten (W), and seaborgium (Sg).

• A. Fe
• B. Mg
• C. Ca
• D. C

Explanation: Iron(Fe) is the most abundant transition metal and the transition metal most widely used in industries as a catalyst and to manufacture…

• A. Increases till Mn and decreases till Zn
• B. Remains unchanged
• C. Decreases
• D. Increase

Explanation: Unpaired electron trend of transition elements increases till Mn and decreases till Zn.