Chemistry Question Bank

Among the transition metals, the melting points of Zn, Cd and Hg are relatively low because

Transition metals

Which of the following metals does not show variable oxidation states ?

The electronic configurations of Eu (Atomic No. 63), Gd (Atomic No. 64) and Tb (Atomic No. 65) are (NEET-I 2016)

Which of the following processes does not involve oxidation of iron? (NEET 2015)

Which one of the following ions exhibits d-d transition and paramagnetic as well? (NEET 2018)

Which of the following compounds is colourless?

Which of the following statements about the interstitial compounds is incorrect? (NEET 2013)

The manganate and permanganate ions are tetrahedral, due to: (NEET 2019)

Sc (Z = 21) is a transition element but Zn (Z = 30) is not because (NEET 2013)

The catalytic activity of transition metals and their compounds is ascribed mainly to (Mains 2012)

Identify the alloy containing a non-metal as a constituent in it. (AIPMT-2012)

Which of the following group of transition metals is called coinage metals? (RPMT 2008)

Which of the following compounds is coloured ? (AIIMS 2008)

What is the correct order of spin only magnetic moment (in BM) of Mn2+, Cr2+ and Ti2+? (AFMC 2008)

Essential component of amalgam is (RPMT 2007)

Reason of passivity of iron is (RPMT 2007)

Acidified potassium permanganate solution is decolourised by (AFMC 2007)

Which of the following compounds is expected to be coloured ?

Identify the species having an atom in +6 oxidation state. (a) (b) [Cr(CN) ] (c)

Sodium chromate is prepared by (a)fusing chromite (FeCr2O4) with sodium chloride in air (b)fusing chromite (FeCr2O4) with sodium hydroxide in air (c)fusing (NH4)2Cr2O7 with sodium hydrogen sulphate in nitrogen

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)

Silver nitrate solution is kept in brown bottles in laboratory because :

Mercury is the only metal that is liquid at 0ºC. This is due to its :

When neutral or faintly alkaline KMnO4 is treated with potassium iodide, iodide ion is converted into ‘X’. ‘X’ is (Odisha NEET 2019)