Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- Molarity of liquid HCl if density of solution is 1.17 gm/cc : -
- Percentage of Se in peroxidase anhydrous enzyme is 0.5% by weight (at. wt = 78.4) then minimum molecular weight of peroxidase...
- Sp. vol. of cylinderical virus particle is 6.02 10^ -2 cc/gm . Whose radius and length are 7 Å & 10 Å respectively. If N_A = 6.02...
- 1 M and 2.5 litre NaOH solution mixed with another 0.5 M and 3 litre NaOH solution. Then find out molarity of resultant solution :
- In Haber process 30 litres of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the...
- The maximum number of molecules is present in :-
- An element, X has the following isotopic composition: ^ 200 X : 90%; ^ 199 X : 8.0%; ^ 202 X : 2.0%. The weighted average atomic...
- Concentrated aqueous sulphuric acid is 98% H _2 SO _4 by mass and has a density of 1.80 g mL ^ -1 . Volume of acid required to...
- What volume of oxygen gas ( O _2) measured at 0^ C and 1 atm, is needed to burn completely 1 L of propane gas ( C _3 H _8)...
- How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
- Volume occupied by one molecule of water (density = 1 g cm ^ -3 ) is
- 10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be:
- 25.3 g of sodium carbonate, Na _2 CO _3 is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates...
- The number of atoms in 0.1 mol of a triatomic gas is: (N_A = 6.02 10^ 23 mol ^ -1 )
- An excess of AgNO _3 is added to 100 mL of a 0.01 M solution of dichlorotetraaquachrominum (III) chloride. The number of moles of...
- When 22.4 litres of H _2(g) is mixed with 11.2 litres of Cl _2(g), each at STP, the moles of HCl(g) formed is equal to
- 1.0 g of magnesium is burnt with 0.56 g O _2 in a closed vessel. Which reactant is left in excess and how much? (At. wt. Mg = 24;...
- In which case is number of molecules of water maximum?
- The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :
- What is the number of moles of sulphur atoms present in n mole molecules of mustard gas ?
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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