Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Some Basic Concepts of Chemistry question

2024 · Q150
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Some Basic Concepts of Chemistry
  5. /2024 · Q150

Some Basic Concepts of Chemistry question

2024 · Q150

NEETChemistrySome Basic Concepts of ChemistryMCQ+4 / −1

A compound X contains 32%32 \%32% of A, 20%20 \%20% of B and remaining percentage of C. Then, the empirical formula of X\mathrm{X}X is :

(Given atomic masses of A=64 ; B=40 ; C=32 u)

  1. A
    A2BC2\mathrm{A}_2 \mathrm{BC}_2A2​BC2​
  2. B
    ABC3\mathrm{ABC}_3ABC3​
  3. C
    AB2C2\mathrm{AB}_2 \mathrm{C}_2AB2​C2​
  4. D
    ABC4\mathrm{ABC}_4ABC4​
View written solutionFree

Correct answer: B

.tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top} .tg .tg-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top}
ElementMass percentage %No. of molesNo. of moles/Smallest numberSimplest whole number
A32%$$
\frac{32}{64}=\frac{1}{2}
$$		$$
\frac{1}{2} \times 2
$$		= 1
B20%$$
\frac{20}{40}=\frac{1}{2}
$$		$$
\frac{1}{2} \times 2
$$		= 1
C48%$$
\frac{48}{32}=\frac{3}{2}
$$		$$
\frac{3}{2} \times 2
$$		= 3

So, empirical formula of

NEET 2024 Chemistry - Some Basic Concepts of Chemistry Question 6 English Explanation

$$ \therefore \text { The correct empirical formula of compound } \mathrm{X} \text { is } \mathrm{ABC}_3 $$

PreviousNext

More from Some Basic Concepts of Chemistry

  • The amount of glucose required to prepare 250 mL of 20M​ aqueous solution is : (Molar mass of glucose : 180 g mol−1)2024 · MCQ
  • 1.0 g of H2​ has same number of molecules as in:2024 · MCQ
  • On complete combustion, 0.3 g of an organic compound gave 0.2 g of CO2​ and 0.1 g of H2​O. The percentage composition of carbon and hydrogen in the compound, respectively is:2024 · MCQ
  • The density of 1 M solution of a compound 'X' is 1.25 g mL−1. The correct option for the molality of solution is (Molar mass of compound X = 85 g):2023 · MCQ
  • The right option for the mass of CO2​ produced by heating 20 g of 20% pure limestone is (Atomic mass of Ca=40 ) [CaCO3​⟶1200 K​CaO+CO2​]…2023 · MCQ
  • What fraction of Fe exists as Fe(III) in Fe0.96O ? (Consider Fe0.96O to be made up of Fe(II) and Fe(III) only)2022 · MCQ
  • The density of the solution is 2.15 g mL−1, then mass of 2.5 mL solution in correct significant figures is :2022 · MCQ
  • In one molal solution that contains 0.5 mole of a solute, there is2022 · MCQ