19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Mercury is the only metal that is liquid at 0ºC. This is due to its :
Silver nitrate solution is kept in brown bottles in laboratory because :
Which one of the following ions is the most stable in aqueous solution ? (At. no. Ti = 22, V = 23, Cr = 24, Mn = 25) (CBSE AIPMT 2007)
Acidified potassium permanganate solution is decolourised by (AFMC 2007)
Reason of passivity of iron is (RPMT 2007)
Essential component of amalgam is (RPMT 2007)
What is the correct order of spin only magnetic moment (in BM) of Mn2+, Cr2+ and Ti2+? (AFMC 2008)
Which of the following compounds is coloured ? (AIIMS 2008)
Which of the following group of transition metals is called coinage metals? (RPMT 2008)
Identify the alloy containing a non-metal as a constituent in it. (AIPMT-2012)
The catalytic activity of transition metals and their compounds is ascribed mainly to (Mains 2012)
Sc (Z = 21) is a transition element but Zn (Z = 30) is not because (NEET 2013)
Which of the following statements about the interstitial compounds is incorrect? (NEET 2013)
Which of the following processes does not involve oxidation of iron? (NEET 2015)
The electronic configurations of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No. 65) are (NEET-I 2016)
Name the gas that can readily decolourise acidified KMnO4 solution. (NEET 2017)
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code (NEET 2018) Column I Column II A. Co3+ i. 8 B.M. B. Cr…
Which one of the following ions exhibits d-d transition and paramagnetic as well? (NEET 2018)
When neutral or faintly alkaline KMnO4 is treated with potassium iodide, iodide ion is converted into ‘X’. ‘X’ is (Odisha NEET 2019)
The calculated spin only magnetic moment o 2+ Cr ion is : (NEET 2020)
Identify the incorrect statement. (NEET 2020)
Identify the incorrect statement. (NEET 2020)
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of: (NEET 2021)
The incorrect statement among the following is: (NEET 2021)
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…