Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of water. Neglecting...
- The molarity of a 10% (v/v) solution of di-bromine solution in CCl_4 (carbon tetrachloride) is 'x'. x = ______________ 10^ -2 M....
- The density of 3 solution of NaCl is 1.0 g mL^ -1 . Molality of the solution is _________ 10^ -2 m. (Nearest integer). Given :...
- Dissolving 120 g of urea (mol. wt. 60) in 1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is
- The volume (in mL) of 0.1 M AgNO_3 required for complete precipitation of chloride ions present in 30 mL of 0.01 M solution of...
- 29.2% (w/w) HCl stock solution has a density of 1.25 g mL^ -1 . The molecular weight of HCl is 36.5 g mol^ -1 . The volume (mL)...
- A compound H_2X with molar weight of 80 g is dissolved in a solvent having density of 0.4 g ml⁻¹. Assuming no change in volume...
- The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by NiCl_2.6H_2O to form a stable...
- Which one of the following has different number of molecules ? (All are kept at normal temperature and pressure)
- How many moles of hydrogen atom are present in one mole of Aluminium hydroxide ?
- 20 g of common salt is dissolved in 180 g of water. What is the mass percentage of the salt in the solution ?
- The proposition 'equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure' is...
- A sample of oxygen contains two isotopes of oxygen with masses 16 u and 18 u respectively. The proportion of these isotopes in...
- Which one of the following is a heterogeneous mixture?
- What is the formula mass of anhydrous sodium carbonate? (Given that the atomic masses of sodium, carbon and oxygen are 23 u, 12 u...
- The equivalent weight of oxalic acid in C_2H_2O_4 2H_2O is
- Which one of the following substances is NOT a mixture ?
- Which one of the following substances is not a mixture ?
- Chlorine occurs in nature in two isotopic forms of masses 35 u and 37 u in the ratio of 3 : 1 respectively. What is the average...
- Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed...
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