NAT II Physical Science Chemistry With Answers

NAT II Physical Science Chemistry

Sr. # Questions Answers Choice
1 Which species represents the electrpohile in aromatic nitrotaion? NO<sup>-</sup><sub>2</sub> NO<sup>+</sup><sub>2</sub> NO2 NO<sup>-</sup><sub>3</sub>
2 Which reaction sequence would be best to prepare 3-chloro-aniline from benzene? Chlorination, nitration, reduction Nitration, Chlorination, reduction Nitration, reduction, chlorination Nitration, reduction, acylation, chorination, hydrolysis
3 Most common reactions of benzene and its derivatives are Electrophilic addition reactions Electrophilic subsitution reactions Nucleoophilic addition reactions Nucleophilic substitution reactions
4 The reaction/method that does not give an alkane is Catalytic hydrogenation of alkanes Wurtz reaction Hydrolysis of alkyl magnesium bromide Dehydrohalogenation of an alkyl halide.
5 Which of the following method is most appropriate for the manufacture of methane? By reduction of CH2SL2 Wurtz reaction Liquification of natural gas None of these
6 The addition of HBr is easiest with CH2 = CHCl CICH = CHCl CH3 - CH = CH2 (CH3)2 C = CH2
7 In Friedal-Craft's alkylation besides AlCl3the other reactants are C6H6 + NH3 C6H6 + CH4 C6H6 + CH3Cl C6H6 + CH3COCl
8 For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to Hydrolysis Oxidation Hydrogenation Electrolysis
9 Octane number is zero for n-Heptane Isooctane n-Hexane Isoheptane
10 The IUPAC name of the compound having the formula (CH3)3C - CH = CH2is 1, 1-Dimethyl-3-butene 1, 1, 1-Trimethyl-3-propene 3, 3,-Dimethyl-1-butene 3, 3, 3,-Trimethyl-1-propene
11 Which of the following substances is used as an antiknock compound? Tetraethyl lead Lead tetrachloride Lead acetate Ethyl acetate
12 The order of reactivity of halogens in aliphatic substitution reactions is Br2 &gt; C12 &gt; F2 Cl2 &gt; Br2 &gt; F2 Cl2 C12 &gt; Br2 F2 &gt; Br2 &gt; C12
13 Acetylene gives White ppt. with ammonical AgNO<sub>3</sub>and red ppt. with ammonical Cu(NO<sub>3</sub>)<sub>2</sub> White ppt. with ammonical AgNo<sub>3 and red ppt. with ammonical</sub>Cu<sub>2</sub>Cl<sub>2</sub> White ppt. with both Red ppt. with both
14 The essential component of organic compound is O C P N
15 Wholer prepared urea from Ammonia NH<sub>4</sub>CNO NH<sub>3</sub> Uric acid
Download This Set

Is this page helpful?