ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Grignard's reagent was prepared in: 1900 1910 1920 1930
2 Steps in SN , reactions are: One Two Three Four
3 Electronegativity order of alkyl halides is: Rl > RBr > RCl > RF Rbr > RCl > RF >Rl RCl > RF >Rl > RBr RF >Ri > RBr >RII
4 Catalyst in the reaction ROH + SOCl2-------> RCL+SO2+HCl is: ZnCl<sub>2</sub> Pyridine H<sub>2</sub>SO<sub>4</sub> Either
5 Primary carbon attaches with other hydrogen atoms directly: One Two Three At least one or more than it
6 Reation of which with Grignard's reagent gives primary alcohol: Formaldehyde Aldehyde Ketones Acetone
7 Reaction of Griganard's reagent with CO2gives: Aldehyde Pri-alcohol Sec-alcohal Carboxylic acid
8 Metal used in the preparation of Grignard's reagent is: Ca Na Mg Zn
9 E2has molecularity : One Two Three Half
10 SN2 reaction has order of reaction : First Second Third Zero
11 Alkyl halides are reactive : High Medium Less Least
12 Best medhod of preparation of alkyl halide from alcohals is by its reaction with: HX SOCl<sub>2</sub> Px<sub>5</sub> and PX<sub>3</sub> All
13 General formula of alkyl halide is: R----X R----OH R------COH R------COOH
14 which one of the following is not a nucleophile? H<sub>2</sub>O H<sub>2</sub>S BF<sub>3</sub> NH<sub>3</sub>
15 The rate of E1reaction depends upon: The concentration of substrate The concentration of nucleophile The concentration of substrate as well as nucleophile None of these
16 Alkyl halides are considered to be very reactive compounds towards nucleophiles, because: They have an electrophilic carbon They have an electrophilic carbon and good living gorup They have an electrophilic carbon and bad living group They have an nucleophilic carbon and good living gorup
17 For which mechanisms, the first step involved is the same: E<sub>1</sub> and E<sub>2</sub> E<sub>2</sub>and SN<sub>2</sub> E<sub>2</sub> and E<sub>1</sub> E1 and SN<sub>1</sub>
18 Elimination bimolecular reactions involve: First order Kinetics Third order kinetics Zero order kinetics
19 SN2reactions can be best carried out with: Prl. alkyl halide Sec. Alkyl halide Ter. Alkyl halide All of three
20 Grignard reagent is reactive due to : The presence of halogen atom The presence of Mg atom The polarity of C - Mg bond None of them
21 When CO2 is made to react with ethyl megnesium iodine, followed by hydrolysis, the product formed is: Propane Propanoic acid Propanal Propanol
22 The reactivity order of alkyl halides for a particular alkyl group is: F &gt;Cl&gt;Br&gt;I Cl&gt;Br&gt;F&gt;l l&gt;Br&gt;Cl&gt;F Br&gt;l&gt;Cl&gt;F
23 In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms? Two Three One Four
24 Hydrocarbons contain : Carbon only carbon Hydrogen only Carbon &amp; hydrogen Carbon , hydrogen &amp; halogen
25 Which one gives acidic reactions? CH<sub>3</sub>----C<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">≡C-------CH<sub>3</sub></span> CH<sub>3</sub>-----CH<sub>2</sub>-----HC=CH----CH<sub>2</sub> CH<sub>3</sub>----CH=CH<sub>2</sub> CH<sub>3</sub>-----C<span style="color: rgb(84, 84, 84); font-family: arial, sans-serif; font-size: small;">≡CH</span>
26 Mustard gas is a : Gas Liquid Solid High boiling point
27 During reaction of O2and alkenes, a product: Glycol Epxide Halohydrin Ethylene glycol
28 Hybridization in alkanes is: sp sp<sup>2</sup> sp<sup>3</sup> dsp<sup>2</sup>
29 Which is liquid among the following alkenes? Ethane Propene Butene Pentene
30 Eletronegativity difference in C-C bond in alkanes is: Zero Double Half 4.0
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