Engineering Chemistry Questions and Answers – R, S- Configuration and Water Softening

This set of Engineering Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “R, S- Configuration and Water Softening”.

1. Which of the following is not a priority rule for R, S-Configuration?
a) If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of lower atomic numbers getting lower priority
b) If the two atoms attached to chiral centre are same, the atoms attached to each of these first atoms are compared
c) When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicated
d) If the four atoms attached to the chiral centre are all different, priority depends on atomic number, with the atom of higher atomic numbers getting lower priority
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2. If our eyes travel in counter clockwise direction from the ligand of highest priority to the ligand of lowest priority, the configuration is ____________
a) R-Configuration
b) S-Configuration
c) E-Configuration
d) C-Configuration
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3. According to the selection rules, the decreasing order of preference is __________
a) –NH₂ > -C₆H₅ > -CH(CH₃)² > -H
b) –CH(CH₃)² > -C₆H₅ > -H> -NH₂
c) –NH₂ > -CH(CH₃)² > -C₆H₅ > -H
d) -C₆H₅ > -CH(CH₃)² >–NH₂ > -H
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4. The process of removal of hardness of water, irrespective of whether it is temporary or permanent is termed as __________
a) Cleansing action of water
b) Hardness of water
c) Softening of water
d) Purity of water
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5. The external treatment of water does not include __________
a) Lime-soda process
b) Sequestration
c) Zeolites
d) Ion-exchange process
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6. Which of the following conditioning method is not used in internal treatment?
a) Colloidal
b) Calgon
c) Carbonate
d) Bicarbonate
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7. Select the incorrect statement from the following option.
a) Internal treatment is carried out outside the boiler before water enters into the boiler
b) Internal treatment methods are followed by blow-down operations
c) Internal treatment is required in low pressure boilers
d) Internal treatment is a corrective method
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8. External treatment is a preventive method and it is required in high pressure boilers.
a) True
b) False
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9. Potable water treatment does not involve __________
a) Disinfection
b) Demineralisation
c) Coagulation
d) Sedimentation
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10. The exhausted anion exchangers can be regenerated by working with __________
a) Acid solution
b) Alcohol solution
c) Alkali solution
d) Water
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Sanfoundry Global Education & Learning Series – Engineering Chemistry.

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