Intej Chemistry Department (Diagnostic 1)

40 Questions | Total Attempts: 77

SettingsSettingsSettings
Chemistry Quizzes & Trivia

Questions and Answers
  • 1. 
    Diagram 1 shows the atomic model of an atom. Which of the following scientists suggested the model?
    • A. 

      Ernest Rutherford

    • B. 

      James Chadwick

    • C. 

      J.J. Thomson

    • D. 

      Neils Bohr

  • 2. 
    Diagram 2 shows the set up of apparatus to investigate the diffusion in a liquid.  After a few hours, the whole test tube of water becomes purple in colour Which of the following statements explain the observation?  
    • A. 

      Potassium manganate(VII) is denser than water.

    • B. 

      Matter is made up of particles that expand uniformly

    • C. 

      Matter is made up of particles that are moving randomly

    • D. 

      Particles in potassium manganate(VII) move faster in water

  • 3. 
    Which of the following solids changes to gaseous state when it is heated?
    • A. 

      Lead(II) iodide

    • B. 

      Silicon dioxide

    • C. 

      Ammonium chloride

    • D. 

      Copper(II) carbonate

  • 4. 
    Which of the following isotopes is used in archaeology?
    • A. 

      Cobalt-60

    • B. 

      Carbon-14

    • C. 

      Iodine-131

    • D. 

      Phosphorus-32

  • 5. 
    The following information is about atom A What is the electron arrangement of atom A?
    • A. 

      2.1

    • B. 

      2.2

    • C. 

      2.5

    • D. 

      2.8.1

  • 6. 
    The mass of two atoms of element X is equal to that of three atoms of sulphur. What is the relative atomic mass of element X? [ Relative atomic mass of S = 32 ]
    • A. 

      96

    • B. 

      48

    • C. 

      32

    • D. 

      24

  • 7. 
    What is the number of molecules in 1 mole of ammonia, NH3? [Avogadro constant = 6.02  x 1023 mol-1]
    • A. 
    • B. 
    • C. 
    • D. 
  • 8. 
    The chemical formula for aluminium sulphate is Al2(SO4)3. What is its relative formula mass? [Relative atomic mass of O =  16, Al = 27  and  S = 32]
    • A. 

      123

    • B. 

      150

    • C. 

      182

    • D. 

      342

  • 9. 
    Table 1 shows part of the Periodic Table of Elements. What are the electron arrangements for atom of elements X and Y?
    • A. 

      X = 2.1 Y = 2.7

    • B. 

      X = 2.1 Y = 2.8.7

    • C. 

      X = 2.8.1 Y = 2.7

    • D. 

      X = 2.8.1 Y = 2.8.7

  • 10. 
    A new element with symbol Nw is discovered. It has eight outer electrons in its atom. Which of the following statements is true?
    • A. 

      Nw exists as monoatomic.

    • B. 

      Nw is a solid at room temperature

    • C. 

      Nw reacts with sodium to form an ionic compound.

    • D. 

      Nw is a good conductor of electricity in solid state.

  • 11. 
    Which of the following metals burn with a very bright purplish flame in a gas jar filled with oxygen and produces a white residue?  
    • A. 

      Lead

    • B. 

      Silver

    • C. 

      Sodium

    • D. 

      Potassium

  • 12. 
    Chlorine is a Group 17 element. Which of the following statements regarding chlorine is true?
    • A. 

      It exists as a liquid at room temperature

    • B. 

      It reacts with water to produce hydrogen gas

    • C. 

      It reacts with iron wool to form iron(II)chloride

    • D. 

      It reacts with potassium to form potassium chloride

  • 13. 
    The atomic size decreases across the Period 3 because the
    • A. 

      Proton number increases

    • B. 

      Nucleon number decreases

    • C. 

      Number of neutrons increases

    • D. 

      Number of shell occupies electron decreases

  • 14. 
    The following information shows the properties of element Q. Q is most probably
    • A. 

      Iron

    • B. 

      Sodium

    • C. 

      Sulphur

    • D. 

      Magnesium

  • 15. 
    An atom that receives an electron forms
    • A. 

      A cation

    • B. 

      An anion

    • C. 

      An ionic bond

    • D. 

      A covalent bond

  • 16. 
    Oxygen atom is different from oxide ion because oxide ion has
    • A. 

      More protons than oxygen atom

    • B. 

      More neutrons than oxygen atom

    • C. 

      More electrons than oxygen atom

    • D. 

      More shells occupied with electron than oxygen atom

  • 17. 
    Diagram 3 shows the set up of apparatus to determine the electrical conductivity of  a substance X The bulb lights up when X is
    • A. 

      Hydrogen chloride.

    • B. 

      Tetrachloromethane.

    • C. 

      Sodium chloride solid

    • D. 

      Potassium iodide solution

  • 18. 
    Which of the following pairs of physical properties of compound W that is formed through transferring of electrons?
    • A. 

                     

    • B. 

                     

    • C. 

                     

    • D. 

                   

  • 19. 
    The melting point of substance Z is -112oC and its boiling point is 78oC. What is the physical state of substance Z at room temperature?
    • A. 

      Gas

    • B. 

      Solid

    • C. 

      Liquid

    • D. 

      Gas and liquid

  • 20. 
    Diagram 4 shows the curve obtained when a solid X is heated. Which of the following statements are true about the curve?
    • A. 

      I and III only

    • B. 

      I and IV only

    • C. 

      II and III only

    • D. 

      II and IV only

  • 21. 
    Diagram 5 shows the standard representation of  beryllium atom. What is the number of valence electrons of beryllium atom?
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      7

  • 22. 
    Bromine-80 and bromine-81 are isotopes.  Both isotopes have 35 protons. Which of the following statements is true about the bromine isotopes?
    • A. 

      Bromine-80 has less electrons than bromine-81

    • B. 

      Both isotopes have the same number of neutrons

    • C. 

      Both isotopes have the same chemical properties

    • D. 

      Bromine-81 has more shells filled with electrons than bromine-80

  • 23. 
    The relative molecular mass of a compound with formula Na2X2 O3 is 158. What is the relative atomic mass of element X?  [ Relative atomic mass of  O = 16 and Na = 23]
    • A. 

      120

    • B. 

      90

    • C. 

      64

    • D. 

      32

  • 24. 
    The bromide of metal M has the formula MBr3 and sodium phosphate has the formula Na3 PO4 .What is the formula of the phosphate of metal M?  
    • A. 

                     

    • B. 

                     

    • C. 

                     

    • D. 

                     

  • 25. 
    Table 2 shows the nucleon number and the number of neutrons in of elements G and L. Which of the following is true about elements G and L?
    • A. 

      G is more reactive than L.

    • B. 

      G is more electropositive than L.

    • C. 

      Both dissolves in water to form an alkaline solution

    • D. 

      Melting point of element G is higher than that of element L

Back to Top Back to top