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اختبار كيمياء تحضيري

Quiz by Dr.mariam 0547389123

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20 questions
Show answers
  • Q1

    what is the specific heat of glass of372 calories are needed to change the temperature of 65 g of it from 80ᵒC to106ᵒC?

    0.22 Cal/g. ᵒC

    9.32 Cal/g. ᵒC

    1 Cal/g. ᵒC

    4.54 Cal/g. ᵒC

    300s
  • Q2

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

    474.2 K

    310.9 K

    315.37 K

    299.76 K

    300s
  • Q3

    How many nanograms are there in 7milligrams?

    7x106

    7x109

    7x10-6

    7x103

    300s
  • Q4

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

    the same number of protons

    the same number of electrons

    the same number of neutrons

    the same number of protons and neutrons

    300s
  • Q5

     All noble gases molecules are...................

    monoatomic

    polyatomic

    Diatomic

    Both a+b

    300s
  • Q6

    The right formula of calcium phosphate is…..

    Ca2(PO4)3

    Ca3(PO4)1

    CaPO4

    Ca3(PO4)2

    300s
  • Q7

    Which one of the following pair atoms is most likely to form an ionic bond?

    C and F

    C and S

    N and H

    K and Cl

    300s
  • Q8

    The name of S2O3 compound is…….

    sulfur oxide

    sulfate

    di sulfur trioxide

    mono sulfur trioxide

    300s
  • Q9

    How many moles of argon are there in 10 L , at 45ᵒC and 0.955 atm?

    0.780 moles

    0.366 moles

    0.955 moles

    1.820 moles

    300s
  • Q10

     As we further from the sea level, the pressure…..

    decrease

    doubled

    did not change

    increase

    300s
  • Q11

    ………….. is needed for the proper functioning of hemoglobin in blood

     Iron

     Zinc

    Iodine

    Fluorine

    300s
  • Q12

     What is the atomic weight of a hypothetical element consisting of two isotopes, one with mass =64.23 amu (26%)and one with mass =65.32 amu (74%)?

    65.5 amu

    65 amu

    64.4 amu

    64.9 amu

    300s
  • Q13

     Which of the following is the electron configuration for a neutral atom of (Mn)?

    1s2 2s2 2p6 3s23p6 4s2 3d5

    1s2 2s2 2p63s2 3p6 4s2 4p5

    1s2 2s2 2p6 3s23p6 4s2 3d3 4p2

    1s2 2s2 2p6 3s23p6 3d7

    300s
  • Q14

    Which of the following elements is predicted to have the lowest ionization energy?

    Mg

    Ba

    Sr

    Ca

    300s
  • Q15

    Complete transfer of one or more electrons fromone atom to different atoms,

    covalent bonds

    ionic bonds

    metallic bonds

    Hydrogen bonds

    300s

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