JEE Main Some Basic Concepts of Chemistry questions
24 Chemistry questions on Some Basic Concepts of Chemistry as asked in JEE Main, newest first. 9 come with a worked solution.
- Compound A reacts with NH_4Cl and forms a compound B. Compound B reacts with H_2O and excess of CO_2 to form compound C which on passing through or reaction with saturated NaCl solution forms sodium hydrogen carbonate.…
2023 · with solution
- Uracil is a base present in RNA with the following structure. % of N in uracil is ___________ [figure] Given : Molar mass N = 14 g mol^-1 O = 16 g mol^-1 C = 12 g mol^-1 H = 1 g mol^-1
2023
- 5 moles of AB_2 weight 125 × 10^-3 kg and 10 moles of A_2B_2 weight 300 × 10^-3 kg. The molar mass of A (M_A) and molar mass of B (M_B) in kg mol^-1 are
2019
- The minimum amount of O_2(g) consumed per gram of reactant is for the reaction (Given atomic mass : Fe = 56, O = 16, Mg = 24, P = 31, C = 12, H = 1)
2019
- At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of O_2 for complete combustion and 40 mL of CO_2 is formed. The formula of the hydrocarbon is
2019
- For a reaction, N_2(g) + 3H_2(g) → 2NH_3(g), identify dihydrogen (H_2) as a limiting reagent in the following reaction mixtures.
2019
- 100 mL of a water sample contains 0.81 g of calcium bicarbonate and 0.73 g of magnesium bicarbonate. The hardness of this water sample expressed in terms of equivalents of CaCO_3 is (molar mass of calcium bicarbonate is…
2019
- The percentage composition of carbon by mole in methane is
2019 · with solution
- 25 mL of the given HCl solution requires 30 mL of 0.1 M sodium carbonate solution. What is the volume of this HCl solution required to titrate 30 mL of 0.2 M aqueous NaOH solution?
2019
- The volume strength of 1 M H_2O_2 is (Molar mass of H_2O_2 = 34 g mol^-1)
2019
- For the following reaction, the mass of water produced from 445 g of C_7H_10O_6 is : 2C_7H_10O_6(s) + 16O_2(g) arrow 14CO_2(g) + 110 H_2O(l)
2019
- The ratio of mass per cent of C and H of an organic compound (C_xH_yO_z) is 6 : 1. If one molecule of the above compound (C_xH_yO_z) contains half as much oxygen as required to burn one molecule of compound C_xH_y…
2018
- The most abundant elements by mass in the body of a healthy human adult are oxygen (61.4%), carbon (22.9%), hydrogen (10.0 %), and nitrogen (2.6%). The weight which a 75 kg person would gain if all ^1H atoms are…
2017
- 1 g of a carbonate (M_2CO_3) on treatment with excess HCl produces 0.01186 mole of CO_2. The molar mass of M_2CO_3 in g mol^-1 is
2017 · with solution
- The molecular formula of a commercial resin used for exchanging ions in water softening is C_8H_7SO_3Na (molecular weight = 206). What would be the maximum uptake of Ca^2+ ions by the resin when expressed in mole per…
2015
- The ratio mass of oxygen and nitrogen of a particular gaseous mixture is 1 : 4. The ratio of number of their molecules is
2014 · with solution
- An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralise 10 mL of this solution is
2001 · with solution
- The volume strength of 1.5 N H_2O_2 is
1990 · with solution
- If 0.50 mole of BaCl_2 is mixed with 0.20 mole of Na_3PO_4, the maximum number of moles of Ba_3(PO_4)_2 that can be formed is
1981 · with solution
- 2.76 g of silver carbonate on being strongly heated yields a residue weighing
1979
- When the same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is
1979
- The largest number of molecules is in
1979
- The total number of electrons in one molecule of carbon dioxide is
1979 · with solution
- A gaseous mixture contains oxygen and nitrogen in the ratio of 1:4 by weight. Therefore, the ratio of their number of molecules is
1979 · with solution
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