FSC Chemistry MCQs Chapter 1 Class 11

Created on February 10, 2022

Chemistry Ch 1 Class 11 Introduction to Fundamental Concepts of Chemistry

1 / 72

How many moles of S02 contain 16 grams of oxygen?

0.5

1

2

2.4

2 / 72

The smallest number of molecules are present in?

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 3.6g of H2

B) 4.8g of C2H5OH

C) 2.8 g of CO

D) 5.4 g of N2O5

3 / 72

Mass of an atom ranges from?

PMC Practice 20
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 1 x 10-28 kg to 1 x 10-22 kg

B) 1 x 10-26 kg to 1 x 10-23 kg

C) 1 x 10-27 kg to 1 x 10-24 kg

D) 1.6373 x 10-27 kg to 1 x 10-25 kg

4 / 72

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
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 14

B) 16

C) 18

D) 2

5 / 72

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

40%

50%

35%

30%

6 / 72

Mass spectrometer can be used to find:

Mass of atom

Mass of ion

Charge to mass ratio of atom

Charge to mass ratio of ion

7 / 72

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
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 33%

B) 40%

C) 53.3%

D) 6.67%

8 / 72

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

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) O is balanced by adding H₂O

B) O is balanced by adding OH

C) All of these

D) O is balanced by adding O₂

9 / 72

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

32

4

16

8

10 / 72

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

Molecular number

Integer

Odd number

Sum of 2 number

11 / 72

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

PMC Practice 21
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Metallic

B) Ionic

C) Covalent

D) Polar covalent

12 / 72

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

PMC Practice 24
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Greater

B) Same

C) Smaller

D) Twice

13 / 72

Actual yield is always less than theoretical yield due to

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Operational losses

B) Reaction reversibility

C) Side reaction

D) All of these

14 / 72

Chemical properties of an atom depends upon number of

Electron

Neutrons

Protons

Nucleons

15 / 72

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

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 8g of oxygen

B) 16g of oxygen

C) 32g of oxygen

D) 24g of oxygen

16 / 72

) Which one of the following has no isotope

Hydrogen

Helium

Nitrogen

None

17 / 72

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

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 165.6 g

B) 157 g

C) 148 g

D) 138 g

18 / 72

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

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Oxygen

B) Natural gas

C) Air

D) There is no limiting reactant

19 / 72

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

UHS 2019
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 1 M

B) 0.5 M

C) 0.25 M

D) 2 M

20 / 72

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-).

PMC Practice 7
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 0.1, 0.2

B) 0.1, 0.3

C) 0.2, 0.4

D) 0.2, 0.1

21 / 72

The total number of neutrons in 5g of H2O are:

1 NA = 6.023 x 1023

PMC Practice 18
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 25 NA

B) 1.1 NA

C) 2.5 NA

D) 0.5 NA

22 / 72

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
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) C3H6O3

B) C4H4O2

C) C8H8O4

D) C6H6O3

23 / 72

Which of the following has six isotopes?

PMC Practice 4
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Manganese

B) Tin

C) Calcium

D) Carbon

24 / 72

Which of the following has six isotopes?

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Cadmium

B) Tin

C) Palladium

D) Carbon

25 / 72

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

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 1nm.

B) 2nm.

C) 3nm.

D) 4nm.

26 / 72

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

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Gram unit.

B) Avigadro's number.

C) Atomic mass.

D) Atomic mass unit.

27 / 72

_______ is a macromolecule found in blood.

PMC Practice 23
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Hemoglobin

B) Plasma

C) Creatinine

D) Plasmids

28 / 72

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

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Size

B) Position

D) Structure

C) Shape

29 / 72

Mass of a neutron in amu is?

1.008386

1.007376

0.0005

None

30 / 72

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

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Mole of a substance

B) Weight of substance

C) Mass of substance

D) Molar mass of substance

31 / 72

A mole of a substance contains _____ particles.

PMC Practice 7
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 6.2×1022

B) 6.22×1022

C) 6.02×1023

D) 6.5×1022

32 / 72

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

) Atomic mases

Atomic number

Both a and b

None of these

33 / 72

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

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Under similar conditions of temperature and pressure, gases react with each other in simple ratio.

B) Under similar conditions of temperature and pressure, equal volumes of all gases contain same number of molecules.

C) At NTP all gases contain same number of molecules.

D) Gases always react with gases only at given temperature and pressure.

34 / 72

In combustion analysis method CO2 is absorbed by?

Mg(OH)2

KOH

Mg(CIO)2

None of thes

35 / 72

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

PMC Practice 22
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Hyperon

B) Neutrino

C) Anti-neutrino

D) All of these options are correct

36 / 72

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

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) rate of reaction

B) pressure

C) conditions

D) Both A & C

37 / 72

The relative abundance of isotopes of elements are measured by?

PMC Practice 11
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Atomic spectroscopy

B) Ionic spectroscopy

C) Mass spectroscopy

D) Mass spectrometry

38 / 72

The unit used to express the relative atomic mass is called

PMC Practice 4
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Gram unit

B) Avogadro's number

C) Atomic mass

D) Atomic mass unit

39 / 72

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

Chromatography

Le-Chatelier's principle

Kc

None of thes

40 / 72

Physical and chemical properties of an element depend upon

Atomic mass only

Atomic number only c

Atomic mass and atomic number respectively

Atomic number and atomic mass respectively

41 / 72

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

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) qualitative

B) quantitative

C) both A & B

D) extensive

42 / 72

Which of the following will react with water?

NUMS 2016
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) CHCl3

B) Cl3CCHO

C) CHI4

D) ClCH2CH2Cl

43 / 72

Which of the following molecule is expressed in empirical formula:

C6H12O6

C6H6

Na2S4O6

C2 H5

44 / 72

In which of the following will water evaporate earlier?

PMC Practice 1
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Cup

B) Saucepan

C) Glass

D) Small bowl

45 / 72

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

PMC Practice 1
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Physical, atomic

B) Physical, chemical

C) Chemical, physical

D) Chemical, atomic

46 / 72

0.5 mole of SO2 contains gram of oxygen?

32

12

16

None

47 / 72

1 amu is?

1.66 x 10^-27 kg

1.602 x 10^27 kg

1.66 x 10^-31 kg

None

48 / 72

The number of neutrons in H2SO4 are ____.

PMC Practice 26
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 5

B) 49

C) 48

D) 44

49 / 72

The atoms of hemoglobin is heavier than H-atoms

PMC Practice 23
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 67,000 times

B) 68,000 times

C) 65,000 times

D) 69,000 times

50 / 72

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

120 gram

12 grams

1.2 grams

0.12 gram

51 / 72

Spectrometry is used when reactants and products absorb _____.

PMC Practice 7
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Ultraviolet radiations

B) Visible radiation

C) Infrared radiation

D) All of these

52 / 72

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

PMC Practice 21
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Atoms

B) Molecules

C) Gas

D) Solid

53 / 72

Actual yield is always less than theoretical yield due to

PMC Practice 29
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) operational losses

B) reaction reversibility

C) side reaction

D) all of these

54 / 72

How many molecules are there in 2.1 moles of CO₂:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 3.49 x 10⁻²⁴

B) 2.53 x 10²⁴

C) 1.26 x 10²⁴

D) 3.79 x 10²⁴

55 / 72

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
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 0.1, 0.2

B) 0.1, 0.3

C) 0.2, 0.4

D) 0.2, 0.1

56 / 72

In mass spectrometry, ionization occurs in form.

Solid

Liquid

Vapor

No ionization occurs during the process.

57 / 72

How many significant figures are there in 0.4793?

NTS 2018
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 3

B) 4

C) 5

D) 6

58 / 72

4 gram atoms of carbon has a mass of:

12

24

48

56

59 / 72

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.

Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Mass

B) Volume

C) Moles

D) All of these

60 / 72

Avogadro’s constant is the number of:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Electrons present in 2g of H

B) Atoms in 24g of Mg

C) Atoms in 1g of He

D) Molecules in 35.5g of Chlorine

61 / 72

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

equal

Half

Double

Quarter

62 / 72

One mole of substance at STP has:

PMC 2021 Tested
Chemistry
Introduction to Fundamental Concepts of Chemistry
Stoichiometry
States of Matter – Gases, Liquids and Solids
Elimination Tool:

A) 2.24 dm³

B) 24.4 dm³

C) 2.44 dm³

D) 22.4 dm³

63 / 72

Limiting reactant controls the amount of _.

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Reactant

B) Products

C) Both A&B

D) None of these

64 / 72

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

PMC Practice 27
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Atoms

B) Particles

C) Molecules

D) None of these

65 / 72

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

PMC Practice 30
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Percentage

B) Actual

C) Theoretical

D) All of these options are correct

66 / 72

The mass number of an atom is:

PMC 2021 Tested
Chemistry
Fundamental Principles of Organic Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) The number of electrons

B) The number of neutrons

C) The number of protons

D) The number of neutrons and protons

67 / 72

Actual yield is always experimental yield.

Less than

More than

Same as

None of the above

68 / 72

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

PMC Practice 26
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) Electrons

B) Protons

C) Positrons

D) Neutrons

69 / 72

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
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 1.4 moles

B) 2.4 moles

C) 2 moles

D) 1.2 moles

70 / 72

Which of the following represents Empirical Formula of Glucose?

CH2O

CHO

C2H0

CHO2

71 / 72

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
Chemistry
Introduction to Fundamental Concepts of Chemistry
Elimination Tool:

A) 0.1, 0.2

B) 0.1, 0.3

C) 0.2, 0.4

D) 0.2, 0.1

72 / 72

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

12.66 x 10^-24

1.66 x 10^-24

1.992 x 10^-23

2.660 x 10^-23

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