كويز 3
Quiz by Dr.mariam 0547389123
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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