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كويز 3

Quiz by Dr.mariam 0547389123

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10 questions
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  • Q1

     Which of the following statements is true?

    the particles in a gas are not free to move at room temperature

    liquids don’t have a fixed shape

     gases have definite volume

     solids have no definite volume

    120s
  • Q2

    The following compounds are polar except……

    CO2

     H2O

    NH3

    CH2Cl2

    120s
  • Q3

    If the electronegativity of Oxygen (O=3.5(and of hydrogen (H=2.1) the bond (O-H) will be……

    polar covalent

    metallic

    nonpolar covalent

    Ionic

    120s
  • Q4

    Carbon dioxide at 17 atms was added to a tank containing, (He) at 10 atm and O2 at 15 atm, what is the total pressure in the tank?

    42 atm

    25 atm

    15 atm

    10 atm

    120s
  • Q5

    what is the specific heat of glass of 372 calories are needed to change the temperature of 65 g ofit from 80ᵒC to 106ᵒC?

    0.22 Cal/g. ᵒC

    9.32 Cal/g. ᵒC

     1 Cal/g. ᵒC

    4.54 Cal/g. ᵒC

    120s
  • Q6

     An infant had a temperature of 100ᵒF. Convert this temperature to K.

    310.9 K

    299.76 K

    315.37 K

    474.2 K

    120s
  • Q7

     How many nanograms are there in 7 milligrams?

    7x10-6

     7x103

    7x106

    7x10-9

    120s
  • Q8

     Considerthe species 72Zn, 75As and 74Ge. These species have:

      the same number of electrons

     the same number of neutrons

     the same number of protons

     the same number of protons and neutrons

    120s
  • Q9

    All noble gases molecules are

    monoatomic

     Diatomic

    Both a+b

     polyatomic

    120s
  • Q10

    The right formula of calcium phosphate is…..

    Ca2(PO4)3

     Ca3(PO4)2

    CaPO4

     Ca3(PO4)1

    120s

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