Exercise # 2 Part # I [Multiple Correct Choice Type Questions] 1. Which of the following statement is /are wrong ? (A) CnH2n is the general formula of alkanes (B) In homologous series, all members have the same physical properties (C) IUPAC means International Union of Physics and Chemistry (D) Butane contains two 1° C atoms and 2°C atom 2. Which of the following statement is/are correct? (A) Homologous series can be represented by a general formula (B) The chemical properties of an organic compound depend on the functional group (C) Group obtained by the removal of one H atom from the alkane are called alkyl groups (D) Alkynes consist of one double-bond in their molecules 3. Which of the following statement is/are correct ? (A) Methane was named as fire damp as it formes explosive mixture with air (B) Primary suffixes are added to the root word to show saturation or unsaturation in a C atom (C) The IUPAC name of the valeric acid is pentanoic acid (D) The common name of hexanoic acid is caproic acid 4. Which of the following statement is /are correct? (A) The IUPAC name of amyl alcohol is pentanol (B) The IUPAC name of isoamyl alcohol is 3-methyl butanol (C) Wood spirit is methanol (D) Methyl alcohol is also called carbinol 5. Which of the following statement is/are correct? (A) The trivial names of organic compounds are called common names (B) The systematic names of organic compound are obtained from the IUPAC system (C) The systematic name of alkanes are based on the number of C atom in the longest continues chain of C atoms (D) The maximum number of functional groups must be included in the C atom chain selected even if it does not satisfy the longest chain rule 6. Which of the following statement is/are wrong? (A) Acetic acid is the systematic of vinegar O (B) Me C OH is an unsaturated compound (C) Prefixes like n–, iso, sec–, tert, neo– etc. are used in IUPAC system. (D) The systematic names of acids are formed by dropping –e of the name of parent alkane and adding –oic acid. 7. Which of the following statement is /are correct? O O (A) R C O C R is an unsaturated compound (B) Neohydrocarbons contain a 3° C atom (C) The IUPAC name of isopropyl alcohol is propan-2-ol (D) The IUPAC name of (CH3CN) is ethanenitrile NOMENCLATURE OF ORGANIC COMPOUND 8. Which of the following statement is/are correct? (A) The common name of benzene-1, 2-diol is catechol (B) The common name of benzene-1, 3-diol is resorcinol (C) The common name of benzene-1, 4-diol is quinol (D) The common name of benzene-1, 4-diol is hydroquinone 9. Which of the following statement is/are correct? (A) The common name of benzene-1, 2, 3-triol is pyrogallol (B) The common name of benzene-1, 2, 4-triol is hydroxyquinol (C) The common name of benzene-1,3, 5-triol is phloroglucinol (D) The common name of (CH2 = CH – Ph) is styrene 10. Which of the following statement is/are correct? (A) The common name of (HOOC – CH2 – COOH) is malonic acid COOH COOH is succinic acid (C) The IUPAC name of (CH2 = CH – OCOCH3) is vinyl acetate (D) The IUPAC name of acrylonitrile is prop-2-ene nitrile (B) The common name of 11. O The compound CH3 CH2 C CH2 may be named as : CH3 (A) 2-ethyl-2-methyl oxirane (C) 1, 2-oxapentane 12. 13. 14. 15. (B) 1, 2-epoxy-2-methylbutane (D) 2-methyl-2-butoxide Which of the following names are not correct for the given compound : CH2 CH CH2 CHO CHO CHO (A) 3-Formyl pentane-1, 5-dial (C) 2-Formylbutane-1, 4-dial (B) 1, 2, 3-Triformylpropane (D) Propane-1, 2, 3-tricarbaldehyde The name (s) of the following compound is : (CH3)2CHCN (A) 2-Methyl propane nitrile (C) Isopropyl cyanide (B) Isobutyro nitrile (D) None of these Which of the following are the names of cyclic ether : (A) Oxirane (B) Epoxyalkane (C) Alkene oxide (D) Carbional The name(s) of the following compound is : CH(OH)COOH CH(OH)COOH (A) tartaric acid (C) ’-dihydroxy succinic acid (B) 2, 3-dihydroxy butane-1,4-dioic acid (D) None of these 16. The compound C6H5 – CH = CH – COOH may be called as : (A) Succinic acid (B) 3-phenylprop-2-en-1-oic acid (C) Mandelic acid (D) Cinnamic acid 17. Which of the following names are correct for the compound : O CH3 C CH2 COOH (A) 3-ketobutan-1-oic acid (C) 3-oxo butan-1-oic acid (B) 4-Carboxy butan -2-one (D) 3-Carboxy acetone [Assertion & Reason Type Questions] Part # II These questions consists of two statements each, printed as Statement-I and Statement-II. While answering these Questions you are required to choose any one of the following four responses. (A) If both Statement-I & Statement-II are True & the Statement-II is a correct explanation of the Statement-I (B) If both Statement-I & Statement-II are True but Statement-II is not a correct explanation of the Statement-I. (C) If Statement-I is True but the Statement-II is False. (D) If Statement-I is False but the Statement-II is True. 1. Statement - I : All the C atom of but-2-ene lie in one plane. Statemennt - II : Double-bond C atoms are sp2-hybridisd. 2. Statement - I : The IUPAC name of isoprene is 2-methyl buta-1, 3-diene. Statement - II : Isoprene unit is a monomer of natural rubber. 3. Statement - I : Pentane and 2-methyl pentane are homolo-gues. Statement - II : Pentane is a straight - chain alkane, while 2-methyl pentane is a branched -chain alkane. 4. Statement - I : The IUPAC name of citric acid is 2-hydroxy-propane-1, 2, 3-tricarboxylic acid. COOH HOOC COOH OH Citric acid Statement - II : When an unbranched C atom is directly linked more than two like-functional groups, then it is named as a derivative of the parent alkane which does not include the C atoms of the functional groups. 5. Statement - I : Rochelle’s salt is used as complexing agent in Tollen’s reagent. Statement -II : Sodium potassium salt of tartaric acid is known as Rochelle’s salt. The IUPAC name of Rochelle’s salt OH COOK NaOOC is sodium potassium -2, 3-dihydroxy butane-1, 4-dioate. OH EXERCISE - 2 : PART # I 1. A, B, C 8. A, B, C, D 15. A, B, C 2. A, B, C 9. A, B, C, D 16. B, D 3. A, B, C, D 10. A, B, D 17. A, C 4. A, B, C, D 11. A, B PART # II 1. A 2. B 3. B 4. A 5. A 5. A, B, C, D 12. B, C 6. A, B, C 13. A, B, C 7. C, D 14. A, B, C