Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- 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:
- 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...
- One mole of P_4 molecules contain:
- Concentration of HCl is 10 N. 100 mL of 1 N HCl can be obtained by diluting:
- The number of atoms in n moles of gas can be given by:
- Molarity of liquid HCl with density equal to 1.17 g/mL is:
- 11.2 litre of NH_3 at STP has electrons:
- How many moles of electrons weigh one kilogram?
- Sulphur forms the chlorides S_2Cl_2 and SCl_2 . The equivalent mass of sulphur in SCl_2 is 16. The equivalent mass of sulphur...
- Two solutions of a substance (non-electrolyte) are mixed in the following manner. 480 mL of 1.5 M of I solution with 520 mL of...
- A g of a metal displaces V mL of H_2 at NTP. Equivalent weight E, of metal is:
- 6.02 10^ 20 molecules of urea are present in 100 mL of its solution. The molarity of urea solution is:
- 50 mL of an aqueous solution of glucose contains 6.02 10^ 22 molecules. The concentration of solution is:
- Molecular weight of tribasic acid is W. Its equivalent weight will be:
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Alcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAlternating CurrentAminesAnatomy of Flowering PlantsAncient Indian HistoryAnimal KingdomApplication of DerivativesArea Under CurveAromatic Compounds and Aryl HalidesAtomsBasic Mathematics and LogarithmBinomial TheoremBiodiversity and ConservationBiological ClassificationBiomoleculesBiotechnology and Its ApplicationsBiotechnology: Principles and ProcessesBody Fluids and CirculationBreathing and Exchange of GasesCell Cycle and Cell DivisionCell: The Unit of LifeChemical Bonding and Molecular StructureChemical Coordination and Integration