Chemistry questions
29404 published questions with worked solutions.
- Fat soluble vitamins are: (A) Vitamin B1 (B) Vitamin C (C) Vitamin E (D) Vitamin B12 (E) Vitamin K Choose the correct answer from...
- 10 mL of 2 M NaOH solution is added to 20 mL of 1 M HCl solution kept in a beaker. Now, 10 mL of this mixture is poured into a...
- X g of nitrobenzene on nitration gave 4.2 g of m–dinitrobenzene. X = _________ g. (nearest integer) [Given: molar mass (in g mol^...
- A sample of n-octane (1.14 g) was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is 5 kJ K^ -1 ....
- Among, Sc, Mn, Co and Cu, identify the element with highest enthalpy of atomisation. The spin only magnetic moment value of that...
- The total number of structural isomers possible for the substituted benzene derivatives with the molecular formula C_9H_ 12 is...
- 2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is:...
- Among 10⁻⁹ g (each) of the following elements, which one will have the highest number of atoms? Element: Pb, Po, Pr and Pt
- Number of molecules from below which cannot give iodoform reaction is : Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol,...
- Given below are two statements : Statement (I) : A catalyst cannot alter the equilibrium constant (K_C) of the reaction,...
- Match the List-I with List-II. List-I (Molecules/ion): (A) PF_5 (B) SF_6 (C) Ni(CO)_4 (D) [PtCl_4]^ 2- List-II (Hybridisation of...
- In a reaction A + B → C, initial concentrations of A and B are related as [A]_0 = 8[B]_0. The half lives of A and B are 10 min...
- The metal ions that have the calculated spin only magnetic moment value of 4.9 B.M. are A. Cr²⁺ B. Fe²⁺ C. Fe³⁺ D. Co²⁺ E. Mn³⁺...
- Given below are two statements: Statement I: The N – N single bond is weaker and longer than that of P – P single bond. Statement...
- Which of the following statements are correct? A. The process of adding an electron to a neutral gaseous atom is always...
- The correct order of the complexes [Co(NH_3)_5(H_2O)]^ 3+ (A), [Co(NH_3)_6]^ 3+ (B), [Co(CN)_6]^ 3- (C) and [CoCl(NH_3)_5]^ 2+...
- The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is _____. FeCl_3 + KOH +...
- Given : H^ _ sub [C(graphite)] = 710 kJ mol⁻¹ _ C-H H^ = 414 kJmol⁻¹ _ H-H H^ = 436 kJmol⁻¹ _ C=C H^ = 611 kJmol⁻¹ The H_f^ for...
- 0.5 g of an organic compound on combustion gave 1.46 g of CO_2 and 0.9 g of H_2O. The percentage of carbon in the compound is...
- Consider the following reactions A + NaCl+H_2SO_4 (Little amount) CrO_2Cl_2 + Side Products CrO_2Cl_2(Vapour) + NaOH B + NaCl +...