Write true TRUE OR FALSE in the following QUESTIONS.
1. Dynamic equilibrium in a reversible reaction is when the forwards reaction and the backwards
reaction are occurring at the same rate. _______________
2. Isotopes of hydrogen element have nearly identical chemical properties because the
number of neutrons has a significant effect on the size of the hydrogen nucleus_______
3. A compound is different from a mixture because bonding among the atoms of the
constituent substances does not occur in a mixture. ____________
4. The physical properties of isotopes are different from each other because they often
depend on mass. _____________
5. A hydrogen bond is the attractive force between the hydrogen attached to an
electronegative atom of one molecule and an electronegative atom of a different
molecule. ___________
6. All hydrocarbons are straight chains. _________
7. The names of the substituents or alkyl groups are derived from the names of the parent
hydrocarbons chain. _______________
8. An alkane called pentane has seven carbon atoms in its parent chain. ___________
9. It is common to represent organic molecules using bond-line structures, where hydrogens are
omitted for clarity, and carbons are represented by a corner or “kink” in the line. _________
10. If an aliphatic chain attached to a benzene ring has more carbons, the benzene ring is treated as a
substituent and is given the name phenyl. __________
11. A mole consists of a number of molecules or atoms which is known as the Avogadro's number.
The Avogadro’s number is 6.02×1026. ______________
12. The volume of a gas is sensitive to both pressure and temperature. _________________
13. Standard temperature and pressure is 0° C and 1 atmosphere, while Room temperature and
pressure is 25° C and 1 atmosphere, respectively. ____________
14. The volume occupied by 1 mole of gas at Room Temperature and Pressure is 22.4 liters of gas.
____________
15. Positional isomerism is when the same functional group is located on different positions. ______
16. Geometrical isomers are also known as Cis-trans isomers. ____
1. TRUE
2. FALSE
3. TRUE
4. TRUE
5. TRUE
6. FALSE
7. TRUE
8. FALSE
9. TRUE
10. TRUE
11. TRUE
12. TRUE
13. TRUE
14. TRUE
15. TRUE
16. TRUE
Draw the alkene structure of the molecular formular 2,4-dimethylhept-3-ene.
CH3 CH3
| |
CH3 - C - C - C - C - C=C - CH2 - CH3
|
CH3
1. True
2. False
3. True
4. True
5. True
6. False
7. True
8. False
9. True
10. True
11. False
12. True
13. True
14. True
15. True
16. True