Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- At equilibrium, the amount of HI in a 3 litre vessel was 12.8 g. Its equilibrium concentration is:
- The number of mole of hydroxide [OH⁻] ion in 0.3 litre of 0.005 M solution of Ba(OH)₂ is:
- To neutralise completely 20 mL of 0.1 M aqueous solution of phosphoric acid H₃PO₄, the volume of 0.1 M KOH solution required is:
- Mole and millimole of reactants react in the ..... as represented by the balanced stoichiometric equation.
- Total number of AlF_3 molecules in a sample of AlF_3 containing 3.01 10^ 23 ions of F^- is:
- In the following change, 3Fe+4H_2O Fe_3O_4+4H_2. If the atomic weight of iron is 56, what is its equivalent weight?
- In the reaction, Cr_2O_7^ 2- +14H^++6I^- 2Cr^ 3+ +7H_2O+3I_2, the eq. wt. of Cr^ 3+ is:
- 1 mole of chlorine combines with a certain weight of a metal giving 111 g of its chloride. What is the atomic weight of the...
- The reaction, Cl_2(g)+S_2O_3^ 2- SO_4^ 2- +Cl^-, is carried out in basic medium. 1.5 mole of Cl_2 are allowed to react with 0.1...
- An oxide of an element has 25% oxygen by mass. What is the equivalent mass of this element?
- The molarity of pure water at 4°C is:
- The molarity of a 100 mL solution containing 5.1 g of hydrogen peroxide is:
- What is the amount of H_2O_2 (in g) present in 1 L of 1N H_2O_2 solution?
- (I) 'x' grams of CaH_2 reacts with water to form 2 moles of dihydrogen gas. (II) 'y' grams of LiH reacts with water to form 2...
- When a 40.00 g sample of NaH is treated with water, 3.00 g of dihydrogen gas was obtained. From this data, the percentage purity...
- What will be the change in the mass (in grams) of 1 mol benzene if all hydrogen atoms are replaced by tritium atoms?[Atomic...
- Mg_xBa_y(CO_3)_z has 8.54% Mg, 48.75% Ba and remaining carbonate. 0.281 kg is decomposed by H_2SO_4. CO_2 formed is _____ mole(s)
- One mole of Ca(HCO_3)_2 is neutralized by _____ mole(s) of KOH
- 96 g of Mg is burnt in air in a closed chamber. On analysis 25% of Mg is converted into oxide and remaining Mg into other...
- For the compound Mg_xBa_y(CO_3)_z (8.54% Mg, 48.75% Ba, remainder carbonate) discussed earlier in this set, x+y+z= _____
Other chapters
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