Chemistry Practice MCQs Chapter 1 Class 11


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Created on By Ali Durrani

Chemistry Ch 1 Class 11 Introduction to Fundamental Concepts of Chemistry

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In the ion-electron method of balancing equations, how oxygen is balanced?

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The atomic mass, molecular mass, ionic mass or formula mass of a substance expressed in grams is called:

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Find the mass in grams of 1.69 mol of phosphoric acid.

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If 9.8 g of sulfuric acid is dissolved in excess quantity of water, it will yield ____ moles of hydrogen ion (H+) and ____ mole of sulphate ions (SO4-2).

PMC Practice 26
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Actual yield is always less than theoretical yield due to

PMC Practice 27
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Mass of an atom ranges from?

PMC Practice 20
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The atoms of hemoglobin is heavier than H-atoms

PMC Practice 23
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A compound has an empirical (simple) formula, C2H2O. If the experimental molecular weight is found to be in the range 160-170, the molecular formula of this compound is:

(Atomic weight: C = 12.1, H = 1.008, O = 16).

PMC Practice 21
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) Which one of the following has no isotope

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What is the percentage by mass of Nitrogen in NH4(NO3)?

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Mass spectrometer is used to determine which of the following quantity?

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The break down of molecular ions from natural productsgive important information about?

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0.5 mole of SO2 contains gram of oxygen?

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Mass of a neutron in amu is?

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If 9.8 g of sulfuric acid is dissolved in excess quantity of water, it will yield ____ moles of hydrogen ion (H+) and _____ moles of sulphate ions (SO42-).

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A sample of 0.7 moles of metal ‘M’ reacts completely with an excess of fluorine to form 45 g of MF2. How many moles of F are present in it?

PMC Practice 17
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Different kinds of atoms of the same element are called isotope having different __________but same ___________ properties.

PMC Practice 1
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The mass number of an atom is:

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Avogadro’s constant is the number of:

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What will be the mass in grams of 12 gram atom of carbon atoms?

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Solution contains 85.5 g of sucrose (C12H22O11) in 250 cm3. What is its molarity?

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2 moles of octane ( C8H18) burn with 25 moles of oxygen (02) and produced __ moles of carbon dioxide along with 18 moles of water.

PMC Practice 20
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One mole of Oxygen has number of atoms as compared to one mole of Nitrogen

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Chemical properties of an atom depends upon number of

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Molecular formula = n (Empirical formula). What does “n” represents in this

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Molecular ions are produced by passing a high energy electron beam or an x-ray beam through _______.

PMC Practice 21
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The efficiency of a chemical reactions can be checked by calculating ________ yield.

PMC Practice 30
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The relative abundance of isotopes of elements are measured by?

PMC Practice 11
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Which of the following has six isotopes?

PMC Practice 4
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If the number of molecules of different gases are the same at S.T.P., the occupied volume will be _____.

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To find the number of molecules in a given compound which of the following is employed?

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If we are given the mass of a substance ,we can calculate the_______ of the other substance with the help of a balanced chemical equation.

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The unit used to express the relative atomic mass is called?

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Limiting reactant controls the amount of _.

PMC Practice 27
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Chemical equations do not tell about the ______ because of certain limitations.

PMC Practice 29
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The smallest number of molecules are present in?

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_______ is a macromolecule found in blood.

PMC Practice 23
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What is the mass of 10^-3 moles of MgSO4?

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In mass spectrometry, ionization occurs in form.

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Glucose(C6H12O6) is the most important nutrient in a cell for generating chemical potential energy, what is the mass percent of carbon in 1.5g of sample?

PMC Practice 24
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Which of the following will react with water?

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Which of the following represents Empirical Formula of Glucose?

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If you need to produce carbon dioxide from 12 grams of carbon, how many grams would you need?

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27 g of Al will react with how much mass of O2 to produce Al2O3?

PMC Practice 22
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The total number of neutrons in 5g of H2O are:

1 NA = 6.023 x 1023

PMC Practice 18
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One mole of substance at STP has:

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Actual yield is always less than theoretical yield due to

PMC Practice 29
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48 / 72

1 amu is?

49 / 72

Mass spectrometer can be used to find:

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The _____ study of composition of pure substance in 17th century clearly shows that few elements are components of many substances

PMC Practice 29
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Physical and chemical properties of an element depend upon

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Which of the following has six isotopes?

PMC Practice 27
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Natural gas in homes burns in excess of oxygen, what is the limiting reactant in this case?

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54 / 72

The number of neutrons in H2SO4 are ____.

PMC Practice 26
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55 / 72

X-ray work in 20th century shows that diameter of the atoms are of the order?

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If 9.8 g of sulfuric acid is dissolved in an excess quantity of water, it will yield _______ moles of hydrogen ion ( H+) and _______ mole of sulphate ions (SO4 -2).

PMC Practice 22
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57 / 72

4 gram atoms of carbon has a mass of:

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How many molecules are there in 2.1 moles of CO₂:

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59 / 72

Which of the following molecule is expressed in empirical formula:

60 / 72

Formula mass is considered for compounds instead of their molecular mass.

PMC Practice 21
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It is the fact that 22.414 cm3 of any gas has a different masses but the same number of

PMC Practice 27
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In combustion analysis method CO2 is absorbed by?

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Spectrometry is used when reactants and products absorb _____.

PMC Practice 7
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An atom is composed of electrons, protons, neutrons and ___.

PMC Practice 22
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Which of the following statement about Avogadro’s hypothesis is correct?

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How many moles of S02 contain 16 grams of oxygen?

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The unit used to express the relative atomic mass is called

PMC Practice 4
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In which of the following will water evaporate earlier?

PMC Practice 1
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A mole of a substance contains _____ particles.

PMC Practice 7
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Actual yield is always experimental yield.

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Isotopes are the atoms of same element having different number of _____.

PMC Practice 26
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How many significant figures are there in 0.4793?

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