Some Basic Concepts of Chemistry questions
951 published questions with worked solutions.
- 100 g of propane is completely reacted with 1000 g of oxygen. The mole fraction of carbon dioxide in the resulting mixture is x...
- The molarity of the solution prepared by dissolving 6.3 g of oxalic acid (H_2C_2O_4.2H_2O) in 250 mL of water in mol L^ -1 is x...
- Consider the complete combustion of butane, the amount of butane utilized to produce 72.0 g of water is_________ 10^ -1 g. (in...
- 100 mL of Na_3PO_4 solution contains 3.45 g of sodium. The molarity of the solution is _____ 10^ -2 mol L^ -1 . (Nearest integer)...
- An aqueous KCl solution of density 1.20 g mL^ -1 has a molality of 3.30 mol kg^ -1 . The molarity of the solution in mol L^ -1 is...
- The NaNO_3 weighed out to make 50 mL of an aqueous solution containing 70.0 mg Na^+ per mL is _______ g. (Rounded off to the...
- If a rocket runs on a fuel (C_ 15 H_ 30 ) and liquid oxygen, the weight of oxygen required and CO_ 2 released for every litre of...
- 0.2 g of an organic compound was subjected to estimation of nitrogen by Duma's method in which volume of N_ 2 evolved (at STP)...
- 56.0 L of nitrogen gas is mixed with excess of hydrogen gas and it is found that 20 L of ammonia gas is produced. The volume of...
- A protein 'A' contains 0.30% of glycine (molecular weight 75). The minimum molar mass of the protein 'A' is _____ 10^ 3 g mol^ -1...
- The neutralization occurs when 10 mL of 0.1 M acid 'A' is allowed to react with 30 mL of 0.05 M base M(OH)_ 2 . The basicity of...
- The number of N atoms in 681 g of C_ 7 H_ 5 N_ 3 O_ 6 is x 10^ 21 . The value of x is _____. (N_A = 6.02 10^ 23 mol^ -1 )...
- 1 L aqueous solution of H_ 2 SO_ 4 contains 0.02 m mol H_ 2 SO_ 4 . 50% of this solution is diluted with deionized water to give...
- Number of grams of bromine that will completely react with 5.0 g of pent-1-ene is _____ 10^ -2 g. (Atomic mass of Br = 80 g/mol)...
- Haemoglobin contains 0.34% of iron by mass. The number of Fe atoms in 3.3 g of haemoglobin is (Given : Atomic mass of Fe is 56 u,...
- Chlorophyll extracted from the crushed green leaves was dissolved in water to make 2 L solution of Mg of concentration 48 ppm....
- When 800 mL of 0.5 M nitric acid is heated in a beaker, its volume is reduced to half and 11.5 g of nitric acid is evaporated....
- CNG is an important transportation fuel. When 100 g CNG is mixed with 208 g oxygen in vehicles, it leads to formation of CO_ 2...
- The moles of methane required to produce 81 g of water after complete combustion is _____ 10^ -2 mol. [nearest integer]
- A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this...
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