QUESTION 8:
Which of the following is the weakest base?
| A. |
NH3 |
|
| B. |
(CH3)3N |
|
| C. |
CH3NH2 |
|
| D. |
|
QUESTION 9:
A compound which is insoluble in water but which dissolves in dilute hydrochloric acid is
| A. |
probably an amide |
|
| B. |
possibly a carboxylic acid |
|
| C. |
almost certainly an amine |
|
| D. |
probably neither acidic nor basic |
|
| E. |
probably an ester |
QUESTION 10:
Homework Answers
8) Answer is A) NH3 is a weak base. As it has less electron density on nitrogen.
9) Answer is C). Amine form ammonium salt when HCl is added hence it dissolve in water.
10) Answer is B) II. As lone pair on nitrogen is not involved in resonance in II but in other compounds lone pair on electrons are involved in resonance hence not available for abstracting proton.
Add Answer to:
QUESTION 8:
Which of the following is the weakest base?
A.
NH3
B.
(CH3)3N
C.
CH3NH2...
Question 2 Which of the following is the weakest base? NH, CH,NH HN- H N- -...
Question 2 Which of the following is the weakest base? NH, CH,NH HN- H N- - - 0 = 0 = 0 2 0 Question 3 How is N- classified? A a quarternary ammonium ion B a quarternary amine oc a secondary amine OD. a primary amine O E a tertiary amine Question 4 What would be the final organic product of the following reaction? NaCN CH.CH,CI - organic 1) excess LiAlH product 2) H0 . C6H5CH2CH2C02H OB C6H5CH2CH2NH2 CH,CH,CHCN...
20) Which of the following compounds gives an infrared spectrom which peaks a 3000-3500 cmt and...
20) Which of the following compounds gives an infrared spectrom which peaks a 3000-3500 cmt and \700 cm ir он с? А? D? В? Q) a compound with the molecular formular C3 Hia HN MR Spectrum Singlet gave the following 81.0 (12H). The structure of the compound is СНа снасна сносна © сHз сHсна сіз сH3 CH3 СН3 CH3CH CH CH2 ② CH₃CCH3 СНа сH3 1 сна 22 Select the correct row of names that correctly corresponds to the structures...
QUESTION 6: QUESTION 7: The stronger a base, the larger its pKb. a.) True b.) False...
QUESTION 6:
QUESTION 7:
The stronger a base, the larger its pKb.
a.) True
b.) False
QUESTION 9:
Question 6 Which amine forms a reasonably stable diazonium salt? NH CH CH; N-CH NH CH CH,CH,NH, H3C-N-CH.CH - = OcIII ODIV OEV Question 9 Which of the following compounds is insoluble in water and dilute sodium hydroxide, but soluble in dilute hydrochloric acid? 1 CHỊCH,NH, IL CH,OOCH - 4 ) , HC cooh > =- OCH ODV
21) Consider the following structures I-IV. Circle the two species that represent resor sonance structures H....
21) Consider the following structures I-IV. Circle the two species that represent resor sonance structures H. O: :0: H .H N. N: 22) Circle the base and the conjugate base in the following reaction но CH,COO CH COOH HO IV ш II Chapter 3 particular molecule? 23) Why do z bonds confer reactivity on a A) Because n bonds are diffficult to break in chemical reactions. B) Because z bonds make a molecule an acid. C) Because z bonds are...
Question 57 If the Kb of a certain aromatic amine is 2.24 x 10, what is...
Question 57 If the Kb of a certain aromatic amine is 2.24 x 10, what is the p Kb? a. 5.35 b. S.65 c. 2.24 d. 9.22 Question 58 What is the order of the following carboxylic acids from strongest acid to weakest acid? COOH (il) COOH COOH >(i)> (i (ii) (iii) (i)> (i) a. (11 d. (11 Question 59 In a pure sample of which of the following is there no hydrogen bonding? a. CH3NH2 o. (CH3)2NH (CH3)3N d....
Which step is incorrect in the following reaction! Dicho Do in Do D20+ in D20 CHO...
Which step is incorrect in the following reaction! Dicho Do in Do D20+ in D20 CHO 020- А в None are incorrect (all are correct) OB Ос Which intermediate is involved in this base-promoted hydrolysis? NaOH/H2O OH + OCH OKOCH, 1 olo options Which sequence of reagents would accomplish this transformation? 1. NaOEt 2. (CH3),CHCH,BE 3. H,09, Heat 1. NaOEt 1. NaoEt 2. CH,CH,CH,CH,Br 2. (CH),CHCH,CH,Br 3. H30*, Heat 3. H,0*, Heat 1. NaOEt 2. (CH3),CHCH, CH,CH,Br 3. H30*, Heat...
QUESTION 8: QUESTION 12: QUESTION 14: QUESTION 16: Question 8 Which of the following compound is...
QUESTION 8:
QUESTION 12:
QUESTION 14:
QUESTION 16:
Question 8 Which of the following compound is hydrolyzed most rapidly by aqueous NaOH? cu&a condolos casos conocimi 00 | CHCOCCH, CH,CH CHUCNH, CH,COCH III. 0 B.11 C! 0 DIV Question 12 What is the major product of the following reaction? 0-OH heat C-OH O=O O= C-OH + CO2 > + H2O OLO + H2O V. AOH OH FO + CO2 OH CA! ОВІ 0 Question 14 Which is the structure of...
1) Name the following carboxylic acids (use both IUPAC and common names): ОН ОН (b) (c)...
1) Name the following carboxylic acids (use both IUPAC and common names): ОН ОН (b) (c) ОН ОН (d) Br ОН ОН NH2 2) Draw the condensed and line structures for the following compounds (a) 3,4-dimethylhexanoic acid (b) Phenylacetic acid (c) 3,4-dinitrobenzoic acid (d) 2,2,3-triflurobutanoic acid (e) 3-hydroxybutanoic acid (1) o-hydroxybenzoic acid (g) a-aminopropionic acid 3) Name the following dicarboxylic acids (use both IUPAC and common names) Он (а) НО ОН НО. (b) он ОН ОН (d) ОН он ОН...
Which of the following acids, whose pKa values are given next to them, would have the...
Which of the following acids, whose pKa values are given next to them, would have the strongest conjugate base? pKa a) H2SO4 b) CH3COOH 4.8 c) HS 12.9 d) NH* 2.0 9.2 Reaction of a carboxylic acid with an alcohol produces: a) an alkane b) an ester c) a ketone d) an amide During the neutralisation of a weak acid by a strong base the pH of the solution equals the pKa of the acid: a) at the beginning of...
Question 5 1 pts Which of the following compounds is the strongest base contains the most...
Question 5 1 pts Which of the following compounds is the strongest base contains the most reactive electron (a) () (c) d) (0) (a) b @d (d) el Question 6 1 pts Which is the most acidic proton of the designated protons on the structure of Lysergic acid? Ha)
Question 2 Which of the following is the weakest base? NH, CH,NH HN- H N- - - 0 = 0 = 0 2 0 Question 3 How is N- classified? A a quarternary ammonium ion B a quarternary amine oc a secondary amine OD. a primary amine O E a tertiary amine Question 4 What would be the final organic product of the following reaction? NaCN CH.CH,CI - organic 1) excess LiAlH product 2) H0 . C6H5CH2CH2C02H OB C6H5CH2CH2NH2 CH,CH,CHCN...
20) Which of the following compounds gives an infrared spectrom which peaks a 3000-3500 cmt and \700 cm ir он с? А? D? В? Q) a compound with the molecular formular C3 Hia HN MR Spectrum Singlet gave the following 81.0 (12H). The structure of the compound is СНа снасна сносна © сHз сHсна сіз сH3 CH3 СН3 CH3CH CH CH2 ② CH₃CCH3 СНа сH3 1 сна 22 Select the correct row of names that correctly corresponds to the structures...
QUESTION 6:
QUESTION 7:
The stronger a base, the larger its pKb.
a.) True
b.) False
QUESTION 9:
Question 6 Which amine forms a reasonably stable diazonium salt? NH CH CH; N-CH NH CH CH,CH,NH, H3C-N-CH.CH - = OcIII ODIV OEV Question 9 Which of the following compounds is insoluble in water and dilute sodium hydroxide, but soluble in dilute hydrochloric acid? 1 CHỊCH,NH, IL CH,OOCH - 4 ) , HC cooh > =- OCH ODV
21) Consider the following structures I-IV. Circle the two species that represent resor sonance structures H. O: :0: H .H N. N: 22) Circle the base and the conjugate base in the following reaction но CH,COO CH COOH HO IV ш II Chapter 3 particular molecule? 23) Why do z bonds confer reactivity on a A) Because n bonds are diffficult to break in chemical reactions. B) Because z bonds make a molecule an acid. C) Because z bonds are...
Question 57 If the Kb of a certain aromatic amine is 2.24 x 10, what is the p Kb? a. 5.35 b. S.65 c. 2.24 d. 9.22 Question 58 What is the order of the following carboxylic acids from strongest acid to weakest acid? COOH (il) COOH COOH >(i)> (i (ii) (iii) (i)> (i) a. (11 d. (11 Question 59 In a pure sample of which of the following is there no hydrogen bonding? a. CH3NH2 o. (CH3)2NH (CH3)3N d....
Which step is incorrect in the following reaction! Dicho Do in Do D20+ in D20 CHO 020- А в None are incorrect (all are correct) OB Ос Which intermediate is involved in this base-promoted hydrolysis? NaOH/H2O OH + OCH OKOCH, 1 olo options Which sequence of reagents would accomplish this transformation? 1. NaOEt 2. (CH3),CHCH,BE 3. H,09, Heat 1. NaOEt 1. NaoEt 2. CH,CH,CH,CH,Br 2. (CH),CHCH,CH,Br 3. H30*, Heat 3. H,0*, Heat 1. NaOEt 2. (CH3),CHCH, CH,CH,Br 3. H30*, Heat...
QUESTION 8:
QUESTION 12:
QUESTION 14:
QUESTION 16:
Question 8 Which of the following compound is hydrolyzed most rapidly by aqueous NaOH? cu&a condolos casos conocimi 00 | CHCOCCH, CH,CH CHUCNH, CH,COCH III. 0 B.11 C! 0 DIV Question 12 What is the major product of the following reaction? 0-OH heat C-OH O=O O= C-OH + CO2 > + H2O OLO + H2O V. AOH OH FO + CO2 OH CA! ОВІ 0 Question 14 Which is the structure of...
1) Name the following carboxylic acids (use both IUPAC and common names): ОН ОН (b) (c) ОН ОН (d) Br ОН ОН NH2 2) Draw the condensed and line structures for the following compounds (a) 3,4-dimethylhexanoic acid (b) Phenylacetic acid (c) 3,4-dinitrobenzoic acid (d) 2,2,3-triflurobutanoic acid (e) 3-hydroxybutanoic acid (1) o-hydroxybenzoic acid (g) a-aminopropionic acid 3) Name the following dicarboxylic acids (use both IUPAC and common names) Он (а) НО ОН НО. (b) он ОН ОН (d) ОН он ОН...
Which of the following acids, whose pKa values are given next to them, would have the strongest conjugate base? pKa a) H2SO4 b) CH3COOH 4.8 c) HS 12.9 d) NH* 2.0 9.2 Reaction of a carboxylic acid with an alcohol produces: a) an alkane b) an ester c) a ketone d) an amide During the neutralisation of a weak acid by a strong base the pH of the solution equals the pKa of the acid: a) at the beginning of...
Question 5 1 pts Which of the following compounds is the strongest base contains the most reactive electron (a) () (c) d) (0) (a) b @d (d) el Question 6 1 pts Which is the most acidic proton of the designated protons on the structure of Lysergic acid? Ha)
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