Chemistry questions
29404 published questions with worked solutions.
- Consider the following statements about manganate and permanganate ions. Identify the correct statements : A. The geometry of...
- The wavelength of photon 'A' is 400 nm. The frequency of photon 'B' is 10^ 16 s⁻¹. The wave number of photon 'C' is 10^4 cm⁻¹....
- Consider the following aqueous solutions. I. 2.2 g Glucose in 125 mL of solution. II. 1.9 g Calcium chloride in 250 mL of...
- The correct order of acidic strength of the major products formed in the given reactions, is : A. PhNH_2 [(2) ,CuCN] (1)...
- Total number of alkali insoluble solid sulphonamides obtained by reaction of given amines with Hinsberg's reagent is……. Aniline,...
- Consider the following reactions. Na_2B_4O_7 2X+Y CuSO_4+Y Non-Luminous flame Z+SO_3 2Z+2X+Carbon Luminous flame 2Q+Na_2B_4O_7+CO...
- For the given reaction; CaCO_3+2HCl CaCl_2+H_2O+CO_2 If 90 g CaCO_3 is added to 300 mL of HCl which contains 38.55% HCl by mass...
- The correct increasing order of spin-only magnetic moment values of the complex ions [MnBr_4]^ 2- (A), [Cu(H_2O)_6]^ 2+ (B),...
- A B (first reaction) C D (second reaction) Consider the above two first-order reactions. The rate constant for first reaction at...
- For strong electrolyte _m increases slowly with dilution and can be represented by the equation _m= °_m-Ac^ 1/2 Molar...
- A volume of x mL of 5M ,NaHCO_3 solution was mixed with 10 mL of 2M ,H_2CO_3 solution to make an electrolytic buffer. If the same...
- A solution of aluminium chloride is electrolysed for 30 minutes using a current of 2A. The amount of the aluminium deposited at...
- How many different stereoisomers are possible for the given molecule ? CH3 – CH(OH) – CH = CH – CH3
- Which of the following electronegativity order is incorrect?
- Lanthanoid ions with 4f⁷ configuration are : (A) Eu2+ (B) Gd3+ (C) Eu3+ (D) Tb3+ (E) Sm2+ Choose the correct answer from the...
- Match List-I with List-II List-I: (A) Al3+ < Mg2+ < Na+ < F– (B) B < C < O < N (C) B < Al < Mg < K (D) Si < P < S < Cl List-II:...
- Which of the following acids is a vitamin ?
- A liquid when kept inside a thermally insulated closed vessel at 25°C was mechanically stirred from outside. What will be the...
- Radius of the first excited state of Helium ion is given as : a0 → radius of first stationary state of hydrogen atom.
- Statement I : CH3 – O – CH2 – Cl will undergo SN1 reaction though it is a primary halide. Statement II : CH3 – C(CH3)(CH3) – CH2...