13 JEE Main 2020 Some Basic Concepts of Chemistry previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2020 previous-year questions from the Some Basic Concepts of Chemistry chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Some Basic Concepts of Chemistry chapter hub.
A solution of two components containing n 1 moles of the 1 st  component and n 2   moles of the 2 nd  co…
The mass of ammonia in grams produced when 2 . 8   kg of dinitrogen quantitatively reacts with 1   kg of dihy…
A 100   mL solution was made by adding 1 . 43   g of Na 2 CO 3 . xH 2 O . The normality of the solution is 0…
0 . 023 × 10 22 molecules are present in 10 g of a substance x ' ' . The molarity of a solution containing 5 g of…
The mole fraction of glucose C 6 H 12 O 6 in an aqueous binary solution is 0 . 1 . The mass percentage of water in it,…
The ammonia N H 3 released on quantitative reaction of 0.6  g urea N H 2 C O N H 2 with sodium hydroxide N a O H c…
The average molar mass of chlorine is 35 . 5   g   mol - 1 . The ratio of Cl 35 to Cl 37 in naturally occurri…
The ratio of the mass percentages of ' C & H ' and ' C & O ' of a saturated acyclic organic compound ' X ' are 4 : 1 an…
The molarity of H N O 3 in a sample which has density 1.4   g / m L and mass percentage of 63 % is ________ (Molec…
Amongst the following statements, that which was not proposed by Dalton was :
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