Dexter Test Series 1.0 (Paper-1) PDF

DEXTER TEST SERIES 1.0 (PAPER-1) SECTION-A Single Answer Correct Type Questions 1. 0.42 g of Mg 2 C3 reacts with water produces gas X. The gas X combination with O2 produce CO2. The volume of CO2 at STP: (Given: Molar mass of Mg = 24 g, C =...

DEXTER TEST SERIES 1.0 (PAPER-1) SECTION-A Single Answer Correct Type Questions 1. 0.42 g of Mg 2 C3 reacts with water produces gas X. The gas X combination with O2 produce CO2. The volume of CO2 at STP: (Given: Molar mass of Mg = 24 g, C = 12 g, O = 16 g and volume of one mole of gas at STP is 22.4) (A) 112 mL (B) 448 mL (C) 336 mL (D) 450 mL 2. In group 13 and group 14 on going down the group, lower oxidation state compounds are more stable because: (I) Down the group I.E. decreases (II) Poor shielding of electrons in s&p - orbitals as compare to d & f-orbitals (III) Down the group electronegativity decreases (IV) Outer shell electron are less shielded from nucleus due to presence of electrons in d-orbitals of penultimate shell (A) I & II (B) I,II,III (C) III & IV (D) IV only 3. 2 A + C ⟶ P follows the mechanism as shown below 2A⇌B (K) (equilibrium constant) B+C⟶P (K f )( rate constant ) d[P] The overall rate, + based on above mechanism is given by dt (A) KK f [A]2 [C][B] (B) KK f [A]2 [C] (C) K[A][B] (D) K f [B][C] cis-2-phenylcyclohexanol ⎯⎯→ A ⎯⎯→ B ⎯⎯⎯ →C Na CS CH I 4. 2 3 ' 𝐶 ' is 2 -methyl xanthate, which on pyrolysis gives: (A) 3-phenylcyclohexene (B) 1-phenylcyclohexene (C) (D) www.dexterchem.in https://t.me/DISCUSSIONWITHCCR  DEXTER TEST SERIES 1.0 (PAPER-1) 5. [X] + dil H2 SO4 ⟶ [Y], a colourless gas with irritating smell [Y] + K 2 Cr2 O7 + H2 SO4 ⟶ Green solution The species [X] and [Y] are (A) SO2− 3 , SO2 (B) Cl− , HCl (C) S 2− , H2 S (D) CO2− 3 , CO2 6. The colour of potassium dichromate is due to: (A) d-d transition (B) transition in K + ion (C) ligand-to-metal charge transfer (D) metal to ligand charge transfer 7. correct statements for metal carbonyl [M(CO)6 ] is/are: (I) 𝜎 bonding electrons are donated by CO group to the metal. (II) d𝜋 − p𝜋 back bonding occurs from the filled metal orbitals. (III) d𝜋 − p𝜋 back bonding makes M − CO bond stronger. (IV) C − O bond length is greater in CO gas as compare to C − O bond length in given complex. (A) I & II Only (B) II & IV Only (C) I,II & IV (D) I,II & III ONLY 8. Which of the following is correct Haworth projection for 𝛼 − D glucopyranose? (A) OH (B) OH O O H H H H H H OH H OH OH OH OH OH OH H OH H H (C) OH (D) OH O O H H H H H H H OH H H OH OH OH OH OH H OH OH www.dexterchem.in https://t.me/DISCUSSIONWITHCCR  DEXTER TEST SERIES 1.0 (PAPER-1) 9. Statement-I: NO is a neutral oxide Statement-II: NO combines with oxygen to form nitrogen dioxide In the light of the above statements, choose the correct answer from the options given below. (A) Both Statement I and Statement II are true (B) Both Statement I and Statement II are false (C) Statement I is true but Statement II is false (D) Statement I is false but Statement II is true 10. O + CH3 CHO ⎯⎯⎯ KOH  →P (A) CH3 – CH2COCH2CHO (B) HO CH2 - CHO (C) O (D) CH CHO CH CH2 11. In PO3− 4 , the bond order of P − O bond and formal charge on 𝑂-atom are, respectively: (A) 0.25, −0.25 (B) 0.50, −0.50 (C) 1.25, −0.75 (D) 0.75, −1.25 12. The rate determining step in the reaction of CH4 with Cl2 is: (A) CH4 + Cl ˙ → CH3 Cl + Ḣ (B) CH4 + Cl ˙ → CH˙ 3 + HCl (C) CH ˙ → CH3 Cl ˙ 3 + Cl (D) Cl2 → 2Cl ˙ 13. The total number of alkenes including geometrical isomers possible by dehydrobromination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is: (A) 2 (B) 3 (C) 4 (D) 5 14. Aromatic nitriles (ArCN) are not prepared by reaction: (A) ArX + KCN (B) ArN2+ + CuCN (C) ArCONH2 + P2 O5 (D) ArCONH2 + SOCl2 www.dexterchem.in https://t.me/DISCUSSIONWITHCCR  DEXTER TEST SERIES 1.0 (PAPER-1) 15. Peptide bond between two 𝛼-amino acids is actually: (A) ether bond (B) ester bond (C) amide bond (D) glycoside bond 16. An orange coloured compound (A) when treated with NaCl & conc. H2 SO4 gives red brown vapour (B). This vapour when passed through NaOH gives yellow coloured solution (C). On addition of CH3 COOH and (CH3 COO)2 Pb to this yellow solution, yellow colored ppt (D) is obtained. Which of the following compound is not resemble with above information: (A) ' A ' is K 2 Cr2 O7 (B) ' B ' is CrO2 Cl2 (C) ' C ' is Na2 CrO4 (D) ' D ' is PbCl2 17. The correct order of equivalent conductance at infinite dilution of LiCl, NaCl and KCl is: (A) LiCl > NaCl > KCl (B) KCl > NaCl > LiCl (C) NaCl > KCl > LiCl (D) LiCl > KCl > NaCl 18. Which of the following cations is aromatic? + + + + (III) (IV) (I) (II) + (A) (II) ,(IV) (B) (IV) (C) (I), (II),(IV) (D)(II), (III), (IV) 19. The number of lone pair of electrons on the central atom of SF4 , CF4 and XeF4 are: (A) 2,0,1 (B) 0,1,2 (C) 1,1,1 (D) 1,0,2 20. The IUPAC name for the complex [Co(NO2 )(NH3 )5 ]Cl2 is : (A) nitrite-N-pentaamminecobalt(III) chloride (B) nitrite-N-pentaamminecobalt(II) chloride (C) pentaamminenitrito-N-cobalt(II) chloride (D) pentaamminenitrito-N-cobalt(III) chloride www.dexterchem.in https://t.me/DISCUSSIONWITHCCR  DEXTER TEST SERIES 1.0 (PAPER-1) SECTION-B INTEGER TYPE / Numerical Value Type 1. On electrolyzing the solution of CH3 COONa(aq), the volume ratio of gases formed at anode and cathode is: 2. Lysine has pka1, pka2, pka3 values 2.18,8.95 and 10.53 respectively. Then value of its isoelectric point (p𝐼 ) is: 3. A current of 0.55Amp deposits 0.55gm of a metal in 100 minutes. Calculate M.W. atomic mass of the metal if equivalent weight = 3 4. pH of 0.01M − (NH4 )2 SO4 and 0.02M − NH4 OH buffer (pka of NH4+ = 9.26) is: 5. Ammonium carbamate is in equilibrium with NH3 and CO2 as: NH2 COONH4 ( s) ⇌ 2NH3 ( g) + CO2 ( g) If total pressure at equilibrium is 3 atm, K p is: www.dexterchem.in https://t.me/DISCUSSIONWITHCCR