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Your Score For Some Basic Concepts Of Chemistry(Chemistry) Test is
The volume of oxygen evolved at STP, by decomposition of 0.68 g ‘20 volume’ hydrogen peroxide solution, isCorrectIncorrect
The system that contains the maximum number of atoms isCorrectIncorrect
1.78 g of an optically active L-amino acid (A) is treated with NaNO2/HCl at 0º C. 448 cm3 of nitrogen was at STP is evolved. A sample of protein has 0.25% of this amino acid by mass. The molar mass of the protein isCorrectIncorrect
10 g of a mixture of BaO and CaO requires 100 cm3 of 2.5 M HCl to react completely. The percentage of calcium oxide in the mixture is approximately
(Given : molar mass of BaO = 153)CorrectIncorrect
The molarity of a solution obtained by mixing 750 mL of 0.5(M) HCl with 250 mL of 2(M) HCl will beCorrectIncorrect
KMnO4 reacts with KI in basic medium to form I2 and MnO2. When 250 mL of 0.1 MKI solution is mixed with 250 mL of 0.02MKMnO4 in basic medium, what is the number of moles of I2 formed?CorrectIncorrect
The volume of oxygen required for complete combustion of 0.25 cm³ of CH4 at S.T.P is _______ cm³CorrectIncorrect
One mole of H2O corresponds to ___CorrectIncorrect
The number of molecules in 16 g of oxygen gas is______CorrectIncorrect
Which of the following has same molecular formula and empirical formula ?CorrectIncorrect
______ reactant is the reactant that is taken in excess than the limiting reactant.CorrectIncorrect
Isotopes are the atoms of the same element having _______.CorrectIncorrect
The number of moles of sodium oxide in 620 g is _______.CorrectIncorrect
Two elements X (Atomic mass 75) and Y (Atomic mass 12) combine to give a compound having 75.8% X. The empirical formula of the compound is _______.CorrectIncorrect
Calculate the number of moles of methane required to produce 33 g of carbon dioxide gas on its complete combustionCorrectIncorrect
The volume of ammonia obtained by the combination of 10 mL of N2 and 30 mL H2 is_______.CorrectIncorrect
The number of atoms in 4.25 g of NH3 is approximately _______.CorrectIncorrect
Which symbol replaces the unit of atomic mass, amu?CorrectIncorrect
An organic compound contains carbon hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67 % and O, 51.62%. The empirical formula of the compound would beCorrectIncorrect
10 g hydrogen is reacted with 64 g oxygen. The amount of water formed will be (in moles) _______.CorrectIncorrect
16 g of oxygen has same number of molecules as inCorrectIncorrect
What will be the molality of the solution containing 18.25 g of HCl gas in 500 g of water?CorrectIncorrect
Find the volume of O2 required to burn 1 L of propane completely, measured at 0℃ temperature and 1 atm pressureCorrectIncorrect
The percentage of Carbon isisCorrectIncorrect
What will be the molarity of a solution, which contains 5.85 g of NaCl(s) per 500 mL?CorrectIncorrect