(Download) UPSC: Geologist Examination Papers-2019
Exam Name : UPSC Geo-Scientist and Geologist Exam 2019
Subject : Chemistry Paper - I
Year : 2019
Paper - I
ITime Allowed : Three Hours
Maximum Marks : 200
QUESTION PAPER SPECIFIC INSTRUCTIONS
1. Answer all of the Following: 5x10=50
1.(a) Complete the following reaction and balance it by ion-electron method : MnO4 + Fe2+ + H+--→
1.(b) Carbon-14 is radioactive and beta-emitter while carbon-12 is not radioactive. Justify.
1.(C) Illustrate diagonal relationship with an appropriate example.
1.(d) Although H3PO4 is viscous it exhibits large electrical conductivity. Why?
1.(e) Fe2+ is more easily oxidized to Fe3+ while Mn2+ to Mn3+ is not. Why?
1.(f) Br2 melts at 7.2°C whereas ICl melts at 272°C. Explain.
1.(g) The dipole moment of CO is merely 0.12 D although electronegativity difference between C and O is large. Why?
1.(h) The strength of HF would increase with concentration. Explain.
1.(i) The electrical conductance of semiconductor increases with temperature unlike those of metals. Why?