Chemistry questions
29404 published questions with worked solutions.
- If the magnetic moment of a dioxygen species is 1.73 B.M, it may be:
- [ Pd(F)(Cl)(Br)(I) ]^ 2- has n number of geometrical isomers. Then, the spin-only magnetic moment and crystal field stabilisation...
- The electronic configurations of bivalent europium and trivalent cerium are: (atomic number: Xe = 54, Ce = 58, Eu = 63)
- For following reactions A 700 K Product A [ catalyst ] 500 K Product it was found that the E_a is decreased by 30 kJ/mol in the...
- 'X' melts at low temperature and is a bad conductor of electricity in both liquid and solid state. X is:Not in JEE Main or NEET syllabus
- Complex X of composition Cr(H_2O)_6Cl_n has a spin only magnetic moment of 3.83 BM. It reacts with AgNO_3 and shows geometrical...
- The acidic, basic and amphoteric oxides, respectivley, are:
- The K_ sp for the following dissociation is 1.6 10^ -5 PbCl_ 2(s) Pb^ 2+ _ (aq) + 2Cl^-_ (aq) Which of the following choices is...
- A chemist has 4 samples of artificial sweetener A, B, C and D. To identify these samples, he performed certain experiments and...
- B has a smaller first ionization enthalpy than Be. Consider the following statements: (i) it is easier to remove 2p electron than...
- If enthalpy of atomisation for Br_ 2(l) is x kJ/mol and bond enthalpy for Br_2 is y kJ/mol, the relation between them:
- The molarity of HNO_3 in a sample which has density 1.4 g/mL and mass percentage of 63% is __________. (Molecular Weight of HNO_3...
- How much amount of NaCl should be added to 600 g of water ( = 1.00 g/mL) to decrease the freezing point of water to -0.2^ ?...
- 108 g of silver (molar mass 108 g mol ^ -1 ) is deposited at cathode from AgNO_3 (aq) solution by a certain quantity of...
- The hardness of a water sample containing 10^ -3 M MgSO_4 expressed as CaCO_3 equivalents (in ppm) is __________. (molar mass of...
- Consider the hypothetical situation where the azimuthal quantum number, takes values 0, 1, 2, .... n + 1. where n is the...
- The increasing order of the reactivity of the following compounds in nucleophilic addition reaction is : Propanal, Benzaldehyde,...
- The d-electron configuration of [ Ru(en)_3 ] Cl_2 and [ Fe(H_2O)_6 ] Cl_2 , respectively are :
- Match the following drugs with their therapeutic actions : List-I: (i) Ranitidine (ii) Nardil (Phenelzine) (iii) Chloramphenicol...Not in JEE Main or NEET syllabus
- Among the statements (I – IV), the correct ones are : (I) Be has smaller atomic radius compared to Mg. (II) Be has higher...