Chemistry Question Bank

[Cr(H2O)6]Cl3 (atomic number of Cr = 24) has a magnetic moment of 3.83 B.M. The correct distribution of 3d electrons in the chromium present in the complex is:

Assign the hybridization, shape and magnetic moment of K3[Cu(CN)4]:

The crystal field splitting energy for octahedral ( ) and tetrahedral ( t ) complexes is related as (a) t (b) t (c) t (d) t

The magnitude of crystal field stabilization energy in tetrahedral complexes (CFSE of t ) is considerably less than that in the octahedral field because

Cr3+ form four complexes with four different ligands which are [Cr(Cl)6]3–, [Cr(H2O)6]3+, [Cr(NH3)6]3+ and [Cr(CN)6]3–. The order of CFSE (0) in these complexes is in the order :

The geometry of Ni(CO)4 and Ni(PPh3)2Cl2 are [Manipal 2006]

[Cr(H2O)6]Cl3 (at. no. of Cr = 24) has a magnetic moment of 3.83 BM, the correct distribution of 3d- electrons in the chromium of the complex is [CBSE AIPMT 2006] (a) xz x -y , x 3d 3d ,3d (b) xy x -y , 3d ,3d 3d , yz…

The pair in which both species have same magnetic moment (spin only value) is [AIIMS 2006]

The number of possible isomers of an octahedral complex [Co(C2O4)2 (NH3)2]– is [AIIMS2006]

Among the following, the species having square planar geometry for central atom are [AIIMS2006] (i) XeF4 (ii) SF4 (iii) [NiCl4] 2– (iv) [PtCl4] 2–

The compound having tetrahedral geometry is

In which of the following coordination entities the magnitude of o (CFSE in octahedral field) will be maximum? (At. no. Co = 27) [CBSE AIPMT2007]

The rate constant for a zero order reaction is 2 × 10–2 mol L–1 sec–1. If the concentration of the reactant after 25 sec is 0.5 M, the initial concentration must have been

Assertion (A) Molecularity of a reaction can have a fractional value. Reason (R) Order of a reaction can have a fractional value.

Assertion (A) The reaction, H Br 2HBr -> has a molecularity of two. Reason (R) Order of reaction is 3/2.

The reaction, 2N O 4NO O is

Four reactions are given below. Which one of them is of zero order? (a) PCl PCl Cl -> (b) 2FeCl SnCl 2FeCl SnCl -> (c) H Cl 2HCl -> (d) N O 2NO O -> Ans. (c) Sol. The order of all photochemical reactions is zero …

Choose the correct answer out of the following choices. Assertion (A) Order and molecularity are different. Reason (R) Order can be determined experimentally and molecularity is the sum of the stoichiometric coefficie…

Choose the correct answer out of the following choices. Assertion (A) Some zero order reactions may have order in fractions. Reason (R) Order cannot be determined from balanced chemical equation.

Which of the following statement(s) is/are correct about order of a reaction? I.The order of a reaction can be a fractional number. II.Order of a reaction is experimentally determined quantity. III.The order of a reac…

Consider the data given below for a hypothetical reactions M N -> Times(s) Rate of reaction (mol L-1 s-1) 4.20 × 10-4 4.20 × 10-4 4.20 × 10-4 4.20 × 10-4 4.18 × 10-4 For the above data, the order of reaction is

Statement I For a complex reaction, order is given by the slowest step of the reaction. Statement II Molecularity of the slowest step is same as the order of the overall reaction. Which of these statement(s) is/are tr…

2NO O 2NO ->

2HI H I -> C. Trimolecula r

NH NO N 2H O -> B. Bimolecular