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

2015 · Q92
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. /2015 · Q92

Some Basic Concepts of Chemistry question

2015 · Q92

NEETChemistrySome Basic Concepts of ChemistryMCQ+4 / −1
If Avogadro number NA, is changed from 6.022 ×\times× 1023 mol−-−1 to 6.022 ×\times× 1020 mol−-−1, this would change
  1. A
    the mass of one mole of carbon
  2. B
    the ratio of chemical species to each other in a balanced equation
  3. C
    the ratio of elements to each other in a compound
  4. D
    the definition of mass in units of grams.
View written solutionFree

Correct answer: A

We know mass of 1 mol (6.022 ×\times× 1023) atoms of carbon = 12 g

If Avogadro number is changed to 6.022 ×\times× 1020 then mass of 1 mol of cabon is

= 12×6.022×10206.022×1023{{12 \times 6.022 \times {{10}^{20}}} \over {6.022 \times {{10}^{23}}}}6.022×102312×6.022×1020​ = 12×10−3 g12 \times {10^{ - 3}}\,g12×10−3g

∴\therefore∴ It would change the mass of one mole of carbon.

PreviousNext

More from Some Basic Concepts of Chemistry

  • The number of water molecules is maximum in2015 · MCQ
  • A mixture of gases contains H2 and O2 gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture ?2015 · MCQ
  • Equal masses of H2, O2 and methane have been taken in a container of volume V at temperature 27oC in identical conditions. The ratio of the volumes of gases H2 : O2 : methane would be2014 · MCQ
  • 1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel, Which reactant is left in excess and how much ? (At. wt. Mg = 24, O = 16)2014 · MCQ
  • When 22.4 liters of H2(g) is mixed with 11.2 litres of Cl2(g), each at S.T.P. the moles of HCl(g) formed is equal to2014 · MCQ
  • In an experiment it showed that 10 mL of 0.05 M solution of chloride required 10 mL of 0.1 M solution of AgNO3, which of the following will be the formula of the chloriode (X stands for the symbol of the element other than chlorine)2013 · MCQ
  • 6.02 × 1020 molecules of urea present in 100 mL of its solution. The concentration of solution is2013 · MCQ
  • How many grams of concentrated nitric acid solution should be used to prepare 250 mL of 2.0 M HNO3? The concentrated acid is 70% HNO3.2013 · MCQ