Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- The chloride of a metal contains 71% chlorine by weight and the vapour density of it is 50. The atomic weight of the metal will...
- H_2O_2 solution used for hair bleaching is sold as a solution of approximately 5.0 g H_2O_2 per 100 mL of solution. The molecular...
- When a metal is burnt, its weight is increased by 24 per cent. The equivalent weight of the metal will be:
- The vapour density of gas A is three times that of gas B. If the molecular weight of A is M, the molecular weight of B is:
- How many g are present in one mole of Ag?
- How many atoms are present in a mole of CH_3COOC_2H_5?
- 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_3H_8) measured...
- 1.5 g of a divalent metal displaced 4 g of copper (at. wt. = 63.6) from a solution of copper sulphate. The atomic weight of the...
- The number of moles of KCl in 1000 mL of 3 molar solution is:
- An element A (at. wt. = 75) and B (at. wt. = 25) combine to form a compound. The compound contains 75% A by weight. The formula...
- The reaction 2 C +2 O _2 2 CO _2 is carried out by taking 24 g carbon and 96 g O_2. Which one is the limiting reagent?
- The maximum number of molecules is present in:
- 25.3 g of sodium carbonate, Na_2CO_3, was dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates...
- 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?
- The equivalent weight of Zn(OH)_2 in the reaction Zn(OH) _2+ HNO _3 Zn(OH)(NO _3)+ H _2 O is equal to its:
- 12 g of Mg (at. wt. = 24) will react completely with an acid to give:
- If 1/6, in place of 1/12, of the mass of a carbon atom is taken as the relative atomic mass unit, the mass of one mole of a...
- The formula which represents the simple ratio of atoms in a compound is called:
- The oxide of an element possesses the formula M_2O_3. If the equivalent weight of the metal is 9, then the atomic weight of the...
- An element forms an oxide in which oxygen is 20% of the oxide by weight. The equivalent weight of the given element 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