Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- The volume of oxygen necessary for the complete combustion of 20 L of propane is
- Air contains 20% O_2 by volume. How much volume of air will be required for 100 cc of acetylene?
- What is the weight of oxygen that is required for the complete combustion of 2.8 kg of ethylene?
- Statement 1: Normality and molarity can be calculated from each other. Statement 2: Normality is equal to the product of molarity...
- Statement 1: A solution which contains one gram equivalent of solute per litre of solution is known as a molar solution....
- Which of the following is not a mixture?
- An example of a homogeneous mixture is
- The number of atoms present in a 0.635 g of Cu piece will be
- Number of molecules in 100 mL of each of O_2, NH_3 and CO_2 at STP are in the order (respectively)
- A signature written with carbon pencil weighs 1 mg. What is the number of carbon atoms present in the signature?
- 19.7 kg of gold was recovered from a smuggler. How many atoms of gold were recovered (Au = 197)?
- How many moles of MgIn _2 S _4 can be made from 1 g each of Mg , In and S ? (Atomic mass: Mg = 24, In = 114.8, S = 32)
- The molecular weight of air will be (the components of air given as N_2 - 78%, O_2 - 21%, Ar - 0.9% and CO_2 - 0.1%)
- The mass of nitrogen per gram hydrogen in the compound hydrazine is exactly one and half times that of ammonia. The fact...
- The molarity of 20.0 mass% H_2SO_4 solution of density 1.14 g cm^ -3 is
- A sample of copper sulphate pentahydrate contains 8.64 g of oxygen. How many grams of Cu is present in this sample? (Atomic mass...
- A sample of AlF_3 contains 3.0 10^ 24 F^- ions. The number of formula units of this sample are
- Calculate the number of moles left after removing 10^ 21 molecules from 200 mg of CO_2.
- A sample of ammonium phosphate (NH_4)_3PO_4 contains 6.36 moles of hydrogen atoms. The number of moles of oxygen atoms in the...
- The number of water molecules present in a drop of water (volume 0.0018 mL) at room temperature is
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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