Chemistry Question Bank

The noble character of platinum and gold is favoured by

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

Transition metals

The calculated spin only magnetic moment o 2+ Cr ion is : (NEET 2020)

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

The last electron of a d-block element occupies the orbital

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

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

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…

Name the gas that can readily decolourise acidified KMnO4 solution. (NEET 2017)

The electronic configurations of the first four members of the actinide series cannot be written accurately in a regular manner because of

Essential component of amalgam is (RPMT 2007)

Na2CrO4 on treatment with lead acetate gives a precipitate. This precipitate is dried and the solid is used as a pigment for road signs and markings. The solid is known as

CrO3 dissolves in aqueous NaOH to give (a) CrO

reacts with OH– as CrO 2CrO 2H Cr O H O -> Cr O The change in oxidation number of Cr is

Acidified potassium permanganate solution is decolourised by (AFMC 2007)

Reason of passivity of iron is (RPMT 2007)

Acidified K2Cr2O7 on treatment with KI produces

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)