Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- A metal oxide contains 20% oxygen by weight. Equivalent weight of metal is
- 74.5 g of a metallic chloride contain 35.5 g of chlorine. The equivalent weight of the metal is
- Number of atoms of He in 100 u of He (atomic weight of He is 4) are
- The molecular mass of a compound (X) if its 3.0115 10^ 9 molecules weigh 1.0 10^ -12 g is
- Equivalent mass of a metal is 12 g mol^ -1 . Hence, equivalent mass of its oxide is
- A divalent metal has 12 equivalent weight. The molecular weight of its oxide is
- The oxide of an element contains 67.67% of oxygen. Equivalent weight of the element is
- Sulphur forms the chlorides S_2Cl_2 and SCl_2 ; the equivalent mass of the sulphur in SCl_2 is 16 g equivalent^ -1 . Thus,...
- The same amount of a metal combines with 0.200 g of oxygen and with 3.17 g of a halogen. Hence, equivalent mass of halogen is
- In the combustion of 5.00 g of a metal, 9.44 g of metal oxide are formed Hence, equivalent mass of the metal is
- One part of an element A combines with two parts of B (another element). Six parts of element C combine with four parts of...
- In the reaction, N_2 + 3 ,H_2 2NH_3 , the ratio of volumes of nitrogen, hydrogen and ammonia is 1: 3: 2. These ratio illustrate...
- Which symbol replaces the unit of atomic mass, amu?
- How many moles of magnesium phosphate, Mg_3(PO_4)_2 will contain 0.25 moles of oxygen atoms?
- The number of Na atom in 46 g Na (Atomic weight of Na = 23) is.
- If the density of methanol is 0.8 kg L^ -1 , what is its volume needed for making 4 L of its 0.25M solution?
- 3.011 10^ 23 atoms of an element weights 1.15 g. The atomic mass of the element is
- Rearrange the following (I to IV) in the order of increasing masses and choose the correct answer (atomic mass; O = 16, Cu = 63,...
- 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? (Atomic weight, Mg...
- When 22.4 L of H_2 (g) is mixed with 11.2 L of Cl_2 (g), each at STP, the moles of HCl(g) formed is equal to
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