JEE Questions for Chemistry Some Basic Concepts Of Chemistry Quiz 5 - MCQExams.com

A gaseous mixture contains CH4 and C2H6 in equimolecular proportion. The weight of 2.24 litres of this mixture at NTP is :
  • 4.6 g
  • 1.6 g
  • 2.3 g
  • 23 g
In an organic compound of molar mass 108 g/ mol , C,H and N atoms are present in 9 : 1 : 3.5 by weight Molecular formula can be
  • C6H8N2
  • C6H10N
  • C5H6N3
  • C4H18N3
In the standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is

  • Chemistry-Some Basic Concepts of Chemistry-7340.png
  • 2)
    Chemistry-Some Basic Concepts of Chemistry-7341.png

  • Chemistry-Some Basic Concepts of Chemistry-7342.png
  • same as molar mass

Chemistry-Some Basic Concepts of Chemistry-7344.png
  • 0.02, 0.02
  • 0.01, 0.01
  • 0.02, 0.01
  • 0.01,0.02
How many moles of electron weight one kilogram ?

  • Chemistry-Some Basic Concepts of Chemistry-7346.png
  • 2)
    Chemistry-Some Basic Concepts of Chemistry-7347.png

  • Chemistry-Some Basic Concepts of Chemistry-7348.png

  • Chemistry-Some Basic Concepts of Chemistry-7349.png
Chose the incorrect statement .
  • The constituents of a compound cannot be separated into simpler substances by physical meth- ods.
  • An element is consists of only one type of particles and these particles may be atoms or molecules.
  • The properties of a compound are same as its constituent elements.
  • Atoms of different elements are different in nature.
Identify the incorrect unit conversion factor.

  • Chemistry-Some Basic Concepts of Chemistry-7351.png
  • 2)
    Chemistry-Some Basic Concepts of Chemistry-7352.png

  • Chemistry-Some Basic Concepts of Chemistry-7353.png
  • None of these
90 g KClO3 on heating gives 2.96 g KCl and 1.92 g oxygen. Which of the following laws is illustrated by this statement ?
  • Law of definite proportion
  • Law of mass conservation
  • Law of multiple proporation
  • Avogadro’s law
Two oxides of a metal ‘M’ contain 27.6% and 30.0% of oxygen respectively. If the formula of the first oxide is M3O4 , find that of the second.
  • M2O3
  • M2O
  • MO2
  • M3O2
Naturally occuring Boron consists of two isotopes having atomic masses 10.01 and 11.01 respectively.Calculate the percentage of both the isotopes in natural Boron (Atomic mass of natural Boron = 10.81)
  • 20% and 80%
  • 80% and 20%
  • 25% and 75%
  • 75% and 25%
Calculate the mass percent of Na and S in sodium sulphate.
  • Na = 16.2%, S = 22.54%
  • Na = 32.39%, S = 11.26%
  • Na = 22.54%, S = 32.39%
  • Na = 32.39%, S = 22.54%
Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% oxygen by mass.
  • FeO
  • Fe2O3
  • Fe3O4
  • Fe3O2
Calculate the concentration of nitric acid in moles per litre which has a density , 1.41 g/mL. %w/w of nitric acid is
  • 15.44M
  • 0.064M
  • 0.077M
  • 12.87M
Calculate the number of sulphate ions in 100mL of 0.001M ammonium sulphate solution.
  • 6.022 × 10-19
  • 6.022 × 1019
  • 6.022 × 1020
  • 6.022 × 10-20
Some statements are given below based on the pictures. Identify true and false statements.
Chemistry-Some Basic Concepts of Chemistry-7358.png
  • FTTT
  • TTTT
  • TTFT
  • FTFT
An aqueous solution of 6.3g oxalic acid dihydrate is made upto 250 mL. The volume of 0.1 N NaOH required to completely neutralize 10 mL of this solution is
  • 40 mL
  • 20 mL
  • 10 mL
  • 4 mL
The pair of the compounds in which both the metals are in the highest possible oxidation state is

  • Chemistry-Some Basic Concepts of Chemistry-7360.png
  • 2)
    Chemistry-Some Basic Concepts of Chemistry-7361.png

  • Chemistry-Some Basic Concepts of Chemistry-7362.png

  • Chemistry-Some Basic Concepts of Chemistry-7363.png
In the analysis of 0.0500 g sample of feldspar, a mixture of the chlorides of sodium and potassium is obtained, which weighs 0.1180 g. Subsequent treatment of the mixed chlorides with silver nitrate gives 0.2451 g of silver chloride. What is the percentage of a sodium oxide and potassium oxide in feldspar ?
  • 10.62% Na2O , 3.58% K2O
  • 3.58% Na2O , 10.62% K2O
  • 10.62% Na2O , 35.8% K2O
  • 35.8% Na2O , 10.62% K2O
5.5 g of a mixture of FeSO4.7H2O and Fe2(SO4)3 9H2O requires 5.4 mL of 0.1N KMnO4 solution for complete oxidation. Calculate the number of mole of Fe2(SO4)39H2O in the mixture.
  • 0.0095
  • 0.15
  • 0.0952
  • 1.52

Chemistry-Some Basic Concepts of Chemistry-7367.png
  • 3.865, 7.732
  • 7.732, 3.865
  • 1.933, 7.732
  • 7.732, 1.933
Haemoglobin present in blood contain 3.72% by mass iron. Calculate the number of iron atoms in 2.0 g of haemoglobin.
  • 4.53 × 1026
  • 4.53 × 1023
  • 5.95 × 1019
  • 8 × 1020
The unit J Pa-1 is equivalent to
  • m3
  • cm3
  • dm3
  • none of these
The density of Al metal is 2.7 gcm-3. An irregularly shaped piece of aluminium weighing 40.0 g is added to a 100 mL graduated cylinder containing 50.0 mL of water. upto what height the water level will rise in the cylinder ?
  • 14.8mL
  • 79.6mL
  • 64.8mL
  • 50mL
Choose the proper option after studying following statement (T = True, F = False)
1. The percent composition of vinyl chloride and its polymer PVC are same.
2. The percent composition of phosphorous trioxide (P2O3)is half than that of its dimer phosphorous hexoxide (P4O6) for each of the elements present in them.
  • T, F
  • F,T
  • T, T
  • F, F
If the atomic mass of carbon were set at 50 amu, what would be the value of Avogadro’s number ?
  • 5.01 × 1024
  • 6.022 × 1024
  • 1.66 × 1024
  • none of these
For which of the following compounds molecular weigh cannot be determined from atomic weights ?
  • Fe4[Fe(CN)6]
  • TiO2
  • TiO1.12
  • none of these
Which of the following chemical equation is incorrectly balanced ?

  • Chemistry-Some Basic Concepts of Chemistry-7371.png
  • 2)
    Chemistry-Some Basic Concepts of Chemistry-7372.png

  • Chemistry-Some Basic Concepts of Chemistry-7373.png

  • Chemistry-Some Basic Concepts of Chemistry-7374.png

Chemistry-Some Basic Concepts of Chemistry-7375.png
  • (i) - (q) (ii) - (p) (iii) - (q)
  • (i) - (r) (ii) - (q) (iii) - (p)
  • (i) - (p) (ii) - (q) (iii) - (r)
  • (i) - (p) (ii) - (q) (iii) - (p)
The number of molecules in 100 mL of each of O2 ,NH3 and CO2 at STP are

  • Chemistry-Some Basic Concepts of Chemistry-7376.png
  • 2)
    Chemistry-Some Basic Concepts of Chemistry-7377.png

  • Chemistry-Some Basic Concepts of Chemistry-7378.png

  • Chemistry-Some Basic Concepts of Chemistry-7379.png
Which of the following represents the formula of a compound which contains 26% nitrogen and 74% oxygen ?
  • N2O
  • NO
  • NO2
  • N2O5
0:0:1


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