19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The conductivity of 0.20 M KCl solution at 298 K is 0.0248 S cm–1. What will be molar conductivity? [Haryana PMT 2010] (a)124 S cm2 (b)124 S cm–1 (c)124 S ohm–1 cm2 equiv–1 (d)124 S cm2 mol–1
Which of the following compounds is expected to be coloured ?
Which of the following compounds is colourless?
The compound ZnSO4 is white because (a)charge is transferred from the metal to the oxygen atoms (b)electron transfer to d level does not occur as the level is already filled to capacity in zinc
Which one of the following oxides of chromium is amphoteric in nature ?
The value of magnetic moment ( spin only) for Cu2+ in CuSO4.5H2O is
Which of the following statements is incorrect for CrO3 ? (a)It is a bright orange solid.
Deep red-yellow vapour of CrO2Cl2 is passed into an aqueous solution of NaOH. The solution turns
Which of the following oxides of manganese is amphoteric ?
Which of the following oxides of manganese is stable as well as strongly acidic ?
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 :
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)