Some Basic Concepts of Chemistry PYQs - Last 10 Years
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ChemistryPhysical Chemistry2017-2026
Practice 92 MHT CET 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 42 of 92 filtered questions.
1Some Basic Concepts Of Chemistry
Find the number of moles of sodium atoms in $6.9 \times 10^{-2} \mathrm{~kg}\left(\right.$ Atomic mass $\left.=23 \mathrm{~g} \mathrm{~mol}^{-1}\right)$
MCQ+1 / -02024
2Some Basic Concepts Of Chemistry
Calculate mass in kg of 2.5 mole ammonia.
MCQ+1 / -02024
3Some Basic Concepts Of Chemistry
What is the percentage by mass of oxygen in NaOH ?
(Atomic mass of $\mathrm{Na}=23 \mathrm{u}, \mathrm{O}=16 \mathrm{u}, \mathrm{H}=1 \mathrm{u}$ )
(Atomic mass of $\mathrm{Na}=23 \mathrm{u}, \mathrm{O}=16 \mathrm{u}, \mathrm{H}=1 \mathrm{u}$ )
MCQ+1 / -02024
4Some Basic Concepts Of Chemistry
What is value of percent atom economy when reactants having sum of formula weight 78 u results in the formation of a product with formula weight 65 u ?
MCQ+1 / -02024
5Some Basic Concepts Of Chemistry
Which of the following pair of compounds cannot demonstrate law of multiple proportion?
MCQ+1 / -02024
6Some Basic Concepts Of Chemistry
What is the percentage atom economy when formula weight of product obtained is 70 u and the sum of formula weight of reactant is 140 u ?
MCQ+1 / -02024
7Some Basic Concepts Of Chemistry
How many molecules of carbon dioxide are formed when 0.6 g carbon is burnt in air?
MCQ+1 / -02024
8Some Basic Concepts Of Chemistry
Chlorine exists in two isotopic forms ${ }^{35} \mathrm{Cl},{ }^{37} \mathrm{Cl}$. If average atomic mass of chlorine is 35.5 , what is the percentage abundance of these isotopes respectively?
MCQ+1 / -02024
9Some Basic Concepts Of Chemistry
What is the volume of oxygen required for complete combustion of 0.25 mole of methane at S.T.P.?
MCQ+1 / -02024
10Some Basic Concepts Of Chemistry
Which law is illustrated by compounds $\mathrm{H}_2 \mathrm{O}$ and $\mathrm{H}_2 \mathrm{O}_2$ formed from two different elements, H and O ?
MCQ+1 / -02024
11Some Basic Concepts Of Chemistry
What is the mass in gram of 1 atom of an element if its atomic mass is \(10 ~\mathrm{u}\) ?
MCQ+1 / -02023
12Some Basic Concepts Of Chemistry
Which of the following concentration terms depends on temperature?
MCQ+1 / -02023
13Some Basic Concepts Of Chemistry
Identify number of moles of donor atoms in \(2 \mathrm{n}\) mole of \(\mathrm{SCN}^{-}\).
MCQ+1 / -02023
14Some Basic Concepts Of Chemistry
What volume of ammonia is formed when \(10 ~\mathrm{dm}^3\) dinitrogen reacts with \(30 ~\mathrm{dm}^3\) dihydrogen at same temperature and pressure?
MCQ+1 / -02023
15Some Basic Concepts Of Chemistry
Calculate the percent atom economy when a product of formula weight \(175 \mathrm{u}\) is obtained in a chemical reaction using \(225 \mathrm{u}\) formula weight reactant.
MCQ+1 / -02023
16Some Basic Concepts Of Chemistry
What is number of atoms present in \(2.24 \mathrm{~dm}^3 \mathrm{~NH}_{3(\mathrm{~g})}\) at STP?
MCQ+1 / -02023
17Some Basic Concepts Of Chemistry
Which of the following pair of compounds demonstrates the law of multiple proportions?
MCQ+1 / -02023
18Some Basic Concepts Of Chemistry
According to reaction,
\(\mathrm{Mg}(s)+2 \mathrm{HCl}(a q) \longrightarrow \mathrm{MgCl}_2(a q)+\mathrm{H}_2(g) \uparrow .\)
Calculate the mass of \(\mathrm{Mg}\) required to liberate \(4.48 \mathrm{~dm}^3 \mathrm{~H}_2\) at STP?
(Molar ma...
\(\mathrm{Mg}(s)+2 \mathrm{HCl}(a q) \longrightarrow \mathrm{MgCl}_2(a q)+\mathrm{H}_2(g) \uparrow .\)
Calculate the mass of \(\mathrm{Mg}\) required to liberate \(4.48 \mathrm{~dm}^3 \mathrm{~H}_2\) at STP?
(Molar ma...
MCQ+1 / -02023
19Some Basic Concepts Of Chemistry
Which from following substances consists of total 1 mole atoms in it? (Molar mass of \(\mathrm{NH}_3=17, \mathrm{H}_2 \mathrm{O}=18, \mathrm{~N}_2=28, \mathrm{CO}_2=44\) )
MCQ+1 / -02023
20Some Basic Concepts Of Chemistry
What is the value of percent atom economy when an organic compound of formula weight \(75 \mathrm{~u}\) is obtained from reactants having sum formula weight \(225 \mathrm{~u}\) ?
MCQ+1 / -02023
21Some Basic Concepts Of Chemistry
How many moles of nitrogen atoms are present in \(8 \mathrm{~g}\) of ammonium nitrate?
(Molar mass of ammonium nitrate \(=80\) )
(Molar mass of ammonium nitrate \(=80\) )
MCQ+1 / -02023
22Some Basic Concepts Of Chemistry
Lithium shows diagonal relationship with
MCQ+1 / -02021
23Some Basic Concepts Of Chemistry
How many molecules are present in \(22400 \mathrm{~cm}^3\) of a gas at STP?
MCQ+1 / -02021
24Some Basic Concepts Of Chemistry
Calculate osmotic pressure exerted by a solution containing \(0.822 \mathrm{~g}\) of solute in \(300 \mathrm{~mL}\) of water at \(300 \mathrm{~K}\).
(Molar mass of solute $$=340 \mathrm{~g} \mathrm{~mol}^{-1}, \mathrm{R}=0.0821 \mathrm{~L} ...
(Molar mass of solute $$=340 \mathrm{~g} \mathrm{~mol}^{-1}, \mathrm{R}=0.0821 \mathrm{~L} ...
MCQ+1 / -02021
25Some Basic Concepts Of Chemistry
The pH of monoacidic weak base is 10.9. Calculate the percent dissociation in 0.02 M solution.
MCQ+1 / -02021
26Some Basic Concepts Of Chemistry
What is percent dissociation of acetic acid in it's \(0.01 \mathrm{~M}\) solution if dissociation of acid is \(1.34 \times 10^{-2}\) ?
MCQ+1 / -02021
27Some Basic Concepts Of Chemistry
Identify the change in colour when \(\mathrm{NaCl}\) solution is titrated against \(\mathrm{AgNO}_3\) solution using fluorescein indicator.
MCQ+1 / -02021
28Some Basic Concepts Of Chemistry
What is percentage atom economy during conversion of reactant to product if formula weight of reactants is 246 u and of product is 123 u?
MCQ+1 / -02021
29Some Basic Concepts Of Chemistry
How many gram of H\(_2\)O are present in 0.25 mol of it?
MCQ+1 / -02021
30Some Basic Concepts Of Chemistry
How many molecules of ammonia gas are present in 67.2 dm\(^3\), measured at S.T.P.?
MCQ+1 / -02021
31Some Basic Concepts Of Chemistry
What is the SI unit of density?
MCQ+1 / -02021
32Some Basic Concepts Of Chemistry
Which from following formulae is a correct formula to determine percent atom economy?
MCQ+1 / -02021
33Some Basic Concepts Of Chemistry
What is the mass of potassium chloride produced when \(12.25 \mathrm{~g}\) potassium chlorate undergo decomposition? (At mass: \(\mathrm{K}=39, \mathrm{Cl}=35.5, \mathrm{O}=16\) )
MCQ+1 / -02021
34Some Basic Concepts Of Chemistry
How many moles of urea are present in 5.4 g ? (Molar mass = 60)
MCQ+1 / -02021
35Some Basic Concepts Of Chemistry
What is the volume (in dm\(^3\)) occupied by 75 g ethane at S.T.P. ?
MCQ+1 / -02021
36Some Basic Concepts Of Chemistry
What is value of percent atom economy if formula weight of product is 46 u and sum of formula weight of all reactants is 92 u?
MCQ+1 / -02021
37Some Basic Concepts Of Chemistry
What amount of oxygen is used at S.T.P. to obtain 9 g water from sufficient amount of hydrogen gas?
MCQ+1 / -02021
38Some Basic Concepts Of Chemistry
"Mass can neither be created nor destroyed" is the statement of
MCQ+1 / -02021
39Some Basic Concepts Of Chemistry
What is the molarity of solution containing \(3.2 \mathrm{~g}\) of \(\mathrm{NaOH}\) (molar mass \(40 \mathrm{~g} \mathrm{~mol}^{-1}\)) in \(250 \mathrm{~cm}^3\) of water?
MCQ+1 / -02020
40Some Basic Concepts Of Chemistry
\(60 \mathrm{~g} \mathrm{~CH}_3 \mathrm{COOH}\) dissolved in \(1 \mathrm{~dm}^3\) solvent, what is molality of solution?
(density = \(1.25 \mathrm{~g} / \mathrm{cm}^3\))
(density = \(1.25 \mathrm{~g} / \mathrm{cm}^3\))
MCQ+1 / -02020
41Some Basic Concepts Of Chemistry
The combining ratios of hydrogen and oxygen in water and hydrogen peroxide are $1: 8$ and $1: 16$. Which law is illustrated in this example?
MCQ+1 / -02019
42Some Basic Concepts Of Chemistry
What is the percentage of carbon in urea? (Atomic mass $C=12, H=1, N=14, O=16$)
MCQ+1 / -02019