Chemistry questions
29404 published questions with worked solutions.
- How many g are present in one mole of MgSO_4 ?
- The equivalent weight of an acid is obtained by dividing its mol. wt. by its:
- The number of mole of solute per kg of solvent is called:
- The mole fraction of NaCl in a solution containing 1 mole of NaCl in 1000 g of water is :
- A molal solution is one that contains one mole of a solute in:
- The dehydration yield of cyclohexanol to cyclohexene is 75%. What would be the yield, if 100 g of cyclohexanol is dehydrated?
- 0.7 g of Na_2CO_3 xH_2O were dissolved in water and the volume was made to 100 mL, 20 mL of this solution required 19.8 mL of...
- 9.8 g of H_2SO_4 is present in 2 litre of a solution. The molarity of the solution is:
- If 20 mL of 0.4 N NaOH solution completely neutralizes 40 mL of a dibasic acid, the molarity of the acid solution is:
- The volume of 0.25 M H_3PO_4 required to neutralise 25 mL of 0.03 M Ca(OH)_2 is:
- The mole fraction of solute in one molal aqueous solution is:
- Polyethylene can be produced from calcium carbide according to the following sequence of reactions; CaC_2 + H_2O CaO + HC CH n HC...
- For preparing M/10 solution of H_2SO_4 in one litre we need H_2SO_4 :
- Equal volumes of 0.1 M AgNO_3 and 0.2 M NaCl are mixed. The concentration of NO_3^- ions in the mixture will be:
- 5.85 g of NaCl are dissolved in 90 g of water. The mole fraction of NaCl is:
- The number of atoms in 0.1 mol of a triatomic gas is: (N_A = 6.02 10^ 23 mol^ -1 )
- If a compound contains two oxygen atoms, four carbon atoms and number of hydrogen atom is double of carbon atoms, the vapour...
- An aqueous solution of urea containing 18 g urea in 1500 cm^3 of solution has a density of 1.052 g/cm^3. If the molecular weight...
- One mole of P_4 molecules contain:
- Which term is to be correctly used for expressing concentration of electrolytes in solution?