Some Basic Concepts of Chemistry PYQs - Last 10 Years
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ChemistryPhysical Chemistry2017-2026
Practice 223 JEE Main Chemistry questions from Some Basic Concepts of Chemistry. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 10 Years Some Basic Concepts of Chemistry Questions
Showing 23 of 223 filtered questions.
1Some Basic Concepts Of Chemistry
For the following reaction, in the mass of water produced from 445 g of C57H110O6 is :
2C57H110O6(s) + 163 O2(g) \(\to\) 114 CO2(g) + 110 H2O(l)
2C57H110O6(s) + 163 O2(g) \(\to\) 114 CO2(g) + 110 H2O(l)
MCQ+4 / -12019
2Some Basic Concepts Of Chemistry
For a reaction,
N2(g) + 3H2(g) \(\to\) 2NH3(g) ;
identify dihydrogen (H2) as a limiting reagent
in the following reaction mixtures.
N2(g) + 3H2(g) \(\to\) 2NH3(g) ;
identify dihydrogen (H2) as a limiting reagent
in the following reaction mixtures.
MCQ+4 / -12019
3Some Basic Concepts Of Chemistry
What would be the molality of 20% (mass/
mass) aqueous solution of KI?
(molar mass of KI = 166 g mol–1)
mass) aqueous solution of KI?
(molar mass of KI = 166 g mol–1)
MCQ+4 / -12019
4Some Basic Concepts Of Chemistry
The percentage composition of carbon by mole
in methane is :
in methane is :
MCQ+4 / -12019
5Some Basic Concepts Of Chemistry
8 g of NaOH is dissolved in 18g of H2O. Mole fraction of NaOH in solution and molality (in mol kg–1) of the solution respectively are -
MCQ+4 / -12019
6Some Basic Concepts Of Chemistry
The mole fraction of a solvent in aqueous solution of a solute is 0.8. The molality (in mol kg–1
) of the
aqueous solution is :
) of the
aqueous solution is :
MCQ+4 / -12019
7Some Basic Concepts Of Chemistry
5 moles of AB2 weigh 125 × 10–3
kg and 10 moles of A2B2 weigh 300 × 10–3
kg. The molar mass of A (MA)
and molar mass of B (MB) in kg mol are:
kg and 10 moles of A2B2 weigh 300 × 10–3
kg. The molar mass of A (MA)
and molar mass of B (MB) in kg mol are:
MCQ+4 / -12019
8Some Basic Concepts Of Chemistry
Thermal decomposition of a Mn compound (X) at 513 K results in compound Y, MnO2 and gaseous product.
MnO2 reacts with NaCl and concentrated H2O4 to give a pungent gas Z. X, Y and Z, respectively, are :
MnO2 reacts with NaCl and concentrated H2O4 to give a pungent gas Z. X, Y and Z, respectively, are :
MCQ+4 / -12019
9Some Basic Concepts Of Chemistry
25 g of an unknown hydrocarbon upon burning produces 88 g of CO2 and 9 g of H2O. This unknown
hydrocarbon contains :
hydrocarbon contains :
MCQ+4 / -12019
10Some Basic Concepts Of Chemistry
A 10 mg effervescent tablet containing sodium bicarbonate and oxalic acid releases 0.25 ml of CO2 at T = 298.15 K and p = 1 bar. If molar volume of CO2 is 25.0 L under such condition, what is the percentage of sodium bicarbonate in each tab...
MCQ+4 / -12019
11Some Basic Concepts Of Chemistry
An organic compound is estimated through Duma's method and was found to evolve 6 moles of CO2. 4 moles of H2O and 1 mole of nitrogen gas. The formula of the compound is :
MCQ+4 / -12019
12Some Basic Concepts Of Chemistry
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 solutions ?
MCQ+4 / -12019
13Some Basic Concepts Of Chemistry
The amount of sugar (C12H22O11) required to prepare 2L of its 0.1 M aqueous solution is :
MCQ+4 / -12019
14Some Basic Concepts Of Chemistry
At 300 K and 1 atmospheric pressure, 10 mL of a hydrocarbon required 55 mL of O2 for complete
combustion, and 40 mL of CO2 is formed. The formula of the hydrocarbon is :
combustion, and 40 mL of CO2 is formed. The formula of the hydrocarbon is :
MCQ+4 / -12019
15Some Basic Concepts Of Chemistry
The minimum amount of O2(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)
56, O = 16, Mg = 24, P = 31, C = 12, H = 1)
MCQ+4 / -12019
16Some Basic Concepts Of Chemistry
An unknown chlorohydrocarbon has 3.55% of chlorine. If each molecule of the hydrocarbon has one chlorine atom only; chlorine atoms present in 1 g of chlorohydrocarbon are :
(Atomic wt. of Cl = 35.5 u; Avogadro constant = 6.023 $$ \times $...
(Atomic wt. of Cl = 35.5 u; Avogadro constant = 6.023 $$ \times $...
MCQ+4 / -12018
17Some Basic Concepts Of Chemistry
A sample of \(NaCl{O_3}\) is converted by heat to \(NaCl\) with a loss of \(0.16\) \(g\) of oxygen. The residue is dissolved in water and precipitated as \(AgCl.\) The mass of \(AgCl\) (in \(g\)) obtained will be : (Given : Molar mass of $$...
MCQ+4 / -12018
18Some Basic Concepts Of Chemistry
For per gram of reactant, the maximum quantity of N2 gas is produced in which of the following thermal decomposition reactions ?
(Given : Atomic wt. - Cr = 52 u, Ba = 137 u)
(Given : Atomic wt. - Cr = 52 u, Ba = 137 u)
MCQ+4 / -12018
19Some Basic Concepts Of Chemistry
The ratio of mass percent of C and H of an organic compound (CXHYOZ) is 6 : 1. If one molecule of the above compound (CXHYOZ) contains half as much oxygen as required to burn one molecule of compound CXHY completely to CO2 and H2O. The empi...
MCQ+4 / -12018
20Some Basic Concepts Of Chemistry
What quantity (in mL) of a 45% acid solution of a mono-protic strong acid must
be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid
solution ?
be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid
solution ?
MCQ+4 / -12017
21Some Basic Concepts Of Chemistry
Excess of NaOH (aq) was added to 100 mL of FeCl3 (aq) resulting into 2.14 g of Fe(OH)3 . The molarity of FeCl3 (aq) is :
(Given molar mass of Fe = 56 g mol−1 and molar mass of Cl = 35.5 g mol−1)
(Given molar mass of Fe = 56 g mol−1 and molar mass of Cl = 35.5 g mol−1)
MCQ+4 / -12017
22Some Basic Concepts Of Chemistry
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 replaced by 2H atoms is:
(22.9%), Hydrogen (10.0%); and Nitrogen (2.6%). The weight which a 75 kg person would gain if all
1H atoms are replaced by 2H atoms is:
MCQ+4 / -12017
23Some Basic Concepts Of Chemistry
1 gram of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2. The molar mass of M2CO3 in g mol–1 is:
MCQ+4 / -12017