Chemistry questions
29404 published questions with worked solutions.
- Heat treatment of muscular pain involves radiation of wavelength of about 900 nm. Which spectral line of H atom is suitable for...
- Match the LIST-I with LIST-II List-I (Name reaction): (A) Swarts reaction (B) Sandmeyer's reaction (C) Wurtz Fittig reaction (D)...
- 2.8 10^ -3 mol of CO2 is left after removing 10^ 21 molecules from its 'x' mg sample. The mass of CO2 taken initially is Given :...
- The major product of the following reaction is : CH_3CH_2CH=O [ reflux ] excess HCHO, alkali ?
- Propane molecule on chlorination under photochemical condition gives two di-chloro products, "x" and "y". Amongst "x" and "y",...
- What amount of bromine will be required to convert 2 g of phenol into 2, 4, 6-tribromophenol ? (Given molar mass in g mol⁻¹ of C,...
- The correct set of ions (aqueous solution) with same colour from the following is :
- Given below are two statements : Statement I : In Lassaigne's test, the covalent organic molecules are transformed into ionic...
- Which of the following happens when NH4OH is added gradually to the solution containing 1M A²⁺ and 1M B³⁺ ions ? Given : K_ sp...
- Match the LIST-I with LIST-II List-I (Classification of molecules based on octet rule): (A) Molecules obeying octet rule (B)...
- If 1 mM solution of ethylamine produces pH = 9, then the ionization constant (Kb) of ethylamine is 10^ -x . The value of x is...
- For the thermal decomposition of N_2O_5(g) at constant volume, the following table can be formed, for the reaction mentioned...
- The standard enthalpy and standard entropy of decomposition of N2O4 to NO2 are 55.0 kJ mol⁻¹ and 175.0 J/K/mol respectively. The...
- Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic...
- Which of the following ions is the strongest oxidizing agent ? (Atomic Number of Ce = 58, Eu = 63, Tb = 65, Lu = 71]
- K_ sp for Cr(OH)_3 is 1.6 10^ -30 . What is the molar solubility of this salt in water?
- Let us consider an endothermic reaction which is non-spontaneous at the freezing point of water. However, the reaction is...
- Given below are two statements I and II. Statement I : Dumas method is used for estimation of "Nitrogen" in an organic compound....
- The carbohydrates "Ribose" present in DNA, is A. A pentose sugar B. present in pyranose from C. in "D" configuration D. a...
- The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of