CHEMISTRY   Which of the following substances can be used for drying of gases: (A) P2O5                                                          (B) H2SO4 (C) CaO                                                          (D) All   10 g of a piece of marble was put into excess of dilute HCl acid. When the…

Chemical Kinetics (Subjective Unsolved)   The nuclei of two isotopes of same substance A-236 & A-234 are present in 4:1 ratio in an ore obtained from some other planet. The half-lives are 30 minute and 60 minute respectively. Both isotopes…

Illustration 1:          The set with correct order of acidity is                               (A)  HClO < HClO2 < HClO3 < HClO4 (B)  HClO4 < HClO3 < HClO2 < HClO                               (C)  HClO <HClO4 < HClO2 < HClO3  (D)  HClO4 <HClO2 < HClO3 <HClO…

Illustration 1:          Which one of the following does not of dissolve in conc. H­2SO4?                               (A) CH3 – C = C – CH3                     (B)  CH3 – CH2 – C º CH                               (C) CH º CH                                   (D)  CH2 = CH2…

    Illustration 1:          One mole of a mixture of CO and CO2 requires exactly 20 gms of NaOH to convert all the CO2 into Na2CO3. How many more gms of NaOH would it require for conversion into Na2CO3 if…

Solved SUbjectives Problem 5:       When treated with Br2 and H2O allyl bromide chiefly the primary alcohol CH2BrCH2OH, in contrast to propylene which gives a secondary alcohol CH3CHOHCH2Br. Explain. Solution:        In the intermediate   * carbon can’t stabilize the positive charge…

Solved Objectives   Problem 1:       Nitrophenol, C6H4(OH) (NO2) can have:                         (A) No isomer ( only a single compound is possible)                         (B) Two isomers                         (C) Three isomers                         (D) Four isomers   Solution:        o-,m- and p-isomers, i.e., position…

  CHEMISTRY (FULL TEST- II)   Time : Two Hours                                                                          Maximum Marks : 100     NOTE :   (i)         Attempt all questions. (ii)        Start each question on a fresh page. (iii)       Answers of all parts of…

Solved Problem Subjectives. Problem 3:             Give the classification of polymers obtained from esters of acrylic acid (CH2 = CH.COOH) Solution: Formula of monomer Polymer Characteristics Uses   Hard transparent, high optical clarity. It is capable of acquiring different colours and…

Chemical Kinetics (Subjective Unsolved)   25 mL of a weak base BOH was titrated with 0.5 M HCl. The pH of solution upon addition of 10 mL acid was 8.6 and that upon addition of 25 mL acid was 8.…