19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Two students use same stock solution of ZnSO₄ but different solutions of CuSO₄. The EMF of one cell is 0.03 V higher than the other. The concentration of CuSO₄ in the cell with higher EMF value is 0.5 M. The concentra…
When metallic copper is shaken with a solution of a copper salt, the reaction proceeds. When equilibrium is established at 298 K, [Cu²⁺]/[Cu⁺]2 = 1.667 × 106 M–1. If the standard potential of the Cu²⁺ | Cu half-cell i…
Philosopher’s wool when heated with BaO at 1100ºC gives the compound :
Spiegeleisen is an alloy of :
Sodium thiosulphate, Na₂S₂O₃. 5H₂O is used in photography to :
Assertion : The melting point of Mn is more than that of Fe. Reason : Mn has higher number of unpaired e– than Fe in atomic state.
Assertion : Hg is the only metal that is liquid at 0ºC. Reason : It has a very high I.P. and weak metallic bond.
Give the correct order of initials T or F for the following statements. Use T if the statement is true and F if it is false. (I) Sulphide ions reacts with Na₂ [Fe(CN)₅(NO)] to form a purple-coloured compound Na₄ [Fe(C…
Which of the following complex species is not expected to exhibit optical isomerism?
The number of geometric isomers that can exist for square planar [Pt (Cl) (py) (NH₃) (NH₂OH)]+ is (py = pyridine):
Ammonia gas does not evolve from the complex FeCl₃.4NH₃ but it gives white precipitate with aqueous solution of AgNO₃. Coordination number of central metal ion in the above complex is six. Give IUPAC name of the complex
The octahedral complex of a metal ion M3+ with four monodentate ligands L1, L2, L3 and L4 absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the f…
Among the following which are ambidentate ligands? (i) - NO (ii) - NO (iii) EDTA 4– (iv) C₂O₄ 2– (v) SCN –
Among the ligands NH₃, en, CN– and CO, the correct order of their increasing field strength, is
Which among the following will be named as dibromidobis-(ethylenediamine) chromium (III) bromide?
The IUPAC name for [(NH₃)₅ Cr– (OH) – Cr(NH₃)₅]5+ is a -hydroxo-bis (pentaammine dichromium) (5+) ion b -hydroxo-bis (decaamminedichromium) (5+) ion
The IUPAC name for [(CO)₃Fe(CO)₃ Fe(CO)₃] is
The IUPAC name for [Be₄O(CH₃COO)₆] is
The IUPAC name for [Pt(py)₄] [PtCl₄] is
The total number of possible isomers of the complex compound [CuII(NH₃)₄][PtIICl₄] is
Which of the following does not show optical isomerism? (en = ethylenediammine)
The optically active coordination complex ion among the following is
Four transition metal octahedral complexes, (the choice given below) low spin electron configurations arises only for
Which of the following is not considered as an organometallic compound?
What is (are) number(s) of unpaired electrons in the square planar [Pt(CN)₄]2– ion?