SINDH MDCAT 2019 Mdcat 2019 ( PART 5) 1. Paramagnetic elements contain: Few unpaired electrons All unpaired electrons Unequal electrons and protons All paired electrons 2. How many atmospheres correspond to 1050 Torr? 1.050 10.38 2.760 1.380 3. The mass of an electron is: 1.008 amu 0.00055 amu 1.009 amu 0.5500 amu 4. The rate of EI reaction depends upon: The concentration of nucleophile The concentration of nucleophile and substrate The amount of the solvent used The concentration of substrate 5. The number of bonds in nitrogen molecules are: Three sigma only Two sigma and one pi One sigma two pi One sigma and one pi 6. An ionic compound A^+ B^- is most likely to be formed when: Both ionization energy of A and electron affinity of B are equal Both ionization energy of A and electron affinity of B are high The ionization energy of A is high and electron affinity of B is low The ionization energy of A is low and electron affinity of B is high 7. The electrophile in aromatic sulphonation is: SO3H^+ H2SO4 SO3 HSO 8. Choose the correct IUPAC name for the following complex. Trichlorotetra amine chromium (III) Dichlorotetra-ammonia chromium (III) chloride Dichlorotetra amine chromium (III) chloride Dichlorotetra amine chromate (III) chloride 9. SN2 reactions can be best carried out with: Secondary alkyl halides Primary alkyl halides Tertiary alkyl halides Both primary and tertiary alkyl halides 10. Name the main product formed in result of the following reaction. Toluene Xylene Benzene Cyclohexane Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
