اختبار كيمياء تحضيري
Quiz by Dr.mariam 0547389123
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- 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