Chemistry Question Bank

HgCl reacts with mercury in an iron vessel to form mercurous chloride. HgCl + Hg Hg Cl Δ -> 2. Mercurous chloride can also be prepared by the reduction of mercury chloride by tin. 2+ 2HgCl + SnCl Hg Cl SnCl ->

Chemically philosopher of wool is :

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

Which of the following electronic configurations represents Fe3+ ?

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)

Which of the following does not possess unpaired electrons ?

Which of the following ions has the maximum number of unpaired d electrons ?

Which of the following is not true about the transition elements ?

For a given ion, the magnetic moment is 2.83 BM. The total spin (s) of all the unpaired electrons is

The noble character of platinum and gold is favoured by

The type of isomerism shown by the complex [CoCl2(en)2] is (NEET 2018)

Assertion: K4[Fe(CN)6] is diamagnetic and [Fe(H2O)6]Cl3 is paramagnetic. Reason: Hybridisation of central metal in K4[Fe(CN)6] is sp3d2, while in [Fe(H2O)6]Cl3 is d 2sp 3. [AIIMS 2009]

The formation of the complex ion [Co(NH3)6]3+ involves sp3d2 hybridization of Co3+. Hence, the complex ion should possess

The geometry and magnetic behaviour of the complex [Ni(CO)4] are (NEET 2018)

The name of complex ion, [Fe(CN)6] 3– is (NEET 2015)

Again for [Fe(H2O)6]Cl3, since H2O is a weak field ligand, the unpaired electrons will not get paired up. Thus the hybridization of Fe will besp 3d 2. So, the reason is not correct. Hence, the correct option is (c).

The coordination compound of which one of the following compositions will produce two equivalents of AgCl on reaction with aqueous silver nitrate solution? [J&K CET 2009]