MULTIPLE CHOICE 13-15 ONLY 5. Why are valence electrons important in identifying the group of an element ? BecauseA. valence electrons can be described as the innermost shell of an atomB. valence electrons described the location of the electrons in the outermost shell of an atomC. valence electrons remains to its orbitalsD. valence electrons are constant6. Unlike other noble gases, helium has two electrons. What makes helium a noble gas or stable element?A.. According to octet rule, helium completed its electron on the outer shellB. Helium belongs to group 8AC. According to octet rule, helium is a non-metalD. According to Hund's helium occupied 1 box with 2 max electrons7. Which of the following has a molecular geometry of tetrahedral?B. CCl,F2D. C20С. CS28. In which compound is hydrogen bonding found?A. ammonia B. carbonic acidA. SF2C. dolomiteD. sodium chloride9. How can a molecule become nonpolar if it contains polar bonds?A. If the molecules has a symmetrical geometry and has all bonds are the same, the bond dipolescancel and the molecule is non polar.B. If the atoms are C or H onlyC. If the atoms have big electronegativity difference but are linearD. If atoms are not belong to the noble gases10. Many organic solvents boil below 200 °C because of covalent bonding, while solids, such as copper,do not melt until thousands of °C because the atoms formA. hydrogen bondB. polar bond11. Which statement is correct about Isomerism?C. IONIC BONDvi D. NONPOLAR bondA. They differ in both physical and chemical properties.B. They have the different molecular formula.C. Chain isomers differ in the arrangement of their skeletonD. They have the same molecular formula.12. What reaction takes place when a substance reacts with oxygen gas, releasing energy in the form of light andheat?C. CombustionD. SaponificationA. Addition200 1B. Condensation13. Which of the following would undergo addition reactions?A. halogenB. alkyne14.Which of the following organic compound will form when a carboxylic acid and an alcohol undergoC. alkaneD. alcoholcondensation reaction?A. new C-C bondC. new N-O bondB. new O-C bondD. ester15. Which of the following types of reaction happens when alkene reacts with water yields in the production ofalcohol?A. SaponificationB. CondensationC. CombustionD. Addition

Ans. 13. Option B is correct: Alkyne Reason: In organic synthesis, an addition reaction is a type…

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

MULTIPLE CHOICE

13-15 ONLY

5. Why are valence electrons important in identifying the group of an element ? Because
A. valence electrons can be described as the innermost shell of an atom
B. valence electrons described the location of the electrons in the outermost shell of an atom
C. valence electrons remains to its orbitals
D. valence electrons are constant
6. Unlike other noble gases, helium has two electrons. What makes helium a noble gas or stable element?
A.. According to octet rule, helium completed its electron on the outer shell
B. Helium belongs to group 8A
C. According to octet rule, helium is a non-metal
D. According to Hund's helium occupied 1 box with 2 max electrons
7. Which of the following has a molecular geometry of tetrahedral?
B. CCl,F2
D. C20
С. CS2
8. In which compound is hydrogen bonding found?
A. ammonia B. carbonic acid
A. SF2
C. dolomite
D. sodium chloride
9. How can a molecule become nonpolar if it contains polar bonds?
A. If the molecules has a symmetrical geometry and has all bonds are the same, the bond dipoles
cancel and the molecule is non polar.
B. If the atoms are C or H only
C. If the atoms have big electronegativity difference but are linear
D. If atoms are not belong to the noble gases
10. Many organic solvents boil below 200 °C because of covalent bonding, while solids, such as copper,
do not melt until thousands of °C because the atoms form
A. hydrogen bond
B. polar bond
11. Which statement is correct about Isomerism?
C. IONIC BOND
vi D. NONPOLAR bond
A. They differ in both physical and chemical properties.
B. They have the different molecular formula.
C. Chain isomers differ in the arrangement of their skeleton
D. They have the same molecular formula.
12. What reaction takes place when a substance reacts with oxygen gas, releasing energy in the form of light and
heat?
C. Combustion
D. Saponification
A. Addition
200 1
B. Condensation
13. Which of the following would undergo addition reactions?
A. halogen
B. alkyne
14.Which of the following organic compound will form when a carboxylic acid and an alcohol undergo
C. alkane
D. alcohol
condensation reaction?
A. new C-C bond
C. new N-O bond
B. new O-C bond
D. ester
15. Which of the following types of reaction happens when alkene reacts with water yields in the production of
alcohol?
A. Saponification
B. Condensation
C. Combustion
D. Addition

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