ECAT Chemistry MCQ's Test For Full Book With Answers

ECAT Chemistry MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 Which is an amorphous solid. NaCl NaOH Diamond Rubber
2 Complete reduction of acids to alkanes is carried out with? Hydrogen iodide Red phosphorous Lithimum ammonium hydride Both B and C
3 The common reagent used in oxidation of Alcohols is. K2Cr2O7 K2CrO4+H2SO4 H2SO4 K2Cr2O7+ H2SO4
4 The reaction CH3Br+OH---------- CH3OH+Br is best described by. Electrophilic substitution Nucleophile substitution bimolecular Nucleophile substitution unimolecular Addition reaction
5 How many isomers are possible for C2H2Cl3 3 1 2 4
6 In the reaction between chlorine and U.V. the propagation step is. CH3+CL ---------CH3 +HCl CH4+Cl-------CH3Cl CH4+CL -------CH3CL +H CH+CL2-----------CL +HCl
7 The statement regarding effect of catalyst on reversible reaction is. To increase equilibrium constant for forward reaction To increase yield of product in equilibrium To increase the rate constant for both reactions To increase the rate of only for ward reaction
8 Tetrahedral lead added to petrol act as Auto catalyst Inhibitor Activator All of these
9 In the reaction 6 NaOH +3Cl ----------- 5NaCl +H2O + NaClO3, Chlorine is. Oxidized Both Reduced None
10 The equation of the rate of forward reaction is. Kf Kf(C)(D) Kr(A)(B) Kr(A)(B) / Kf(C)(D)
11 The function of salt bridge in galvanic cell is To prevent accumulation of ions in two half To add salt ions in two half To block flow of ions between two half None of these
12 Which compound out the following is used in berthing equipment as it absorbs CO2 and gives out O at the same time. Na2O2 KO2 MgO BaO
13 Which of the following equation represents reaction when lithium nitrate is heated. 2LiNo4------- Li2O + NO2 4Li NO3 ------- 4LiO2 + 4NO2 +O2 LiNO3---------Li2O + 4NO2 2LiNO4------- Li2O + NO2+O2
14 Which of the following hydrides ionic in nature NaH CH4 NH4 H2S
15 Which of the following is strangest reducing agent. Cl- K+ Ar Ca+2
16 Which molecule out of given molecules will not form hydrogen bond with another of the given molecules. NH3 CH3OH CH2NH3 CH2CHO
17 Which of the following consists of atoms and molecules and are held together by WAHDERWADD forces. H2O CO2 Cu MgO
18 In a experiment 0.10 of gas found to occupy 83.1 cm3 Measured at standard pressure (1.0 x 105 pa) and 26 degree. The relative molecular mass is. (0.10)(8.31)(27)/(1.0x10<sup>3</sup>)(83.3x10<sup>-3</sup>) (0.10)(8.31)(300)/(1.0x10<sup>3</sup>)(83.3x10<sup>-6</sup>) (0.10)(8.31)(27)/(1.0x10<sup>3</sup>)(83.3) (0.10)(8.31)(300)/(1.0x10<sup>3</sup>)(83.3)
19 How many atoms of carbon are there in 18 g of C6H12O6? 6.02 x 10<sup>23</sup> 3.6 x 10<sup>23</sup> 6.02 x 10<sup>22</sup> 3.6 x 10<sup>22</sup>
20 In which reaction Hydrogen behave as oxidizing agent? H2+Cl2-------------- 2HCl C2H2CHO+H2--------C2H4+H2-------CH6 2Na+H2----------2NaOH C2H2CHO+H2-----------C2H5H2OH
21 The change in enthalpy of reaction NaOH ------------NaCl + H2O is Heat of reaction Heat of neutralization heat of combustion Heat of fusion Heat of combustion
22 Which of the molecule does not exhibit TETRAHEDRAL arrangement of electron pairs? H2O NH3 SiCl2 None of these
23 Ionization energy does not increase? With small atomic radius of atom If increase in no of electronic shells By increase in proton no of atom None of these
24 Which of the following statement regarding CATHODE RAY is correct. Cathode rays can ionize gas Cathode rays cannot cause chemical changes Cathode rays can possess momentum All of these
25 In microwave own , the wave energy produced in absorbed by certain polar molecule, On which molecule out of the given molecules would maximum energy? SiO2 NaCl C2H5OH None of these
26 Benzene is stable to: Oxidation Nitration KMnO<sub>4</sub> SULPHONATION
27 Hydrolysis of alkyl nitriles is done to get carboxylic acids in the presence of Mineral acids Mineral alkalies Organics acids Minerals acids &amp; alkalies
28 Hydrolysis of alkyl nitriles gives: alkane alkyl halide alkyl nitride carboxylic acids
29 Compounds containing cyanide group (.........C=H) are called: Nitrides Nitrites Nitriles Cyanides
30 Primary alcohols and aldehydes are oxidized to corresponding: alkanes alkenes Alkynes Carboxylic Acid
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