UPSC Government Jobs Exams

The phenomenon of radioactivity was discovered by [UPSC 2008]

Madam Curie
J.J. Thomson
Roentgen
Becquerel

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UPSC Other Question

The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation? [UPSC 2011 (CS-P)]
1. There are no clouds or water vapour in the lower stratosphere.
2. There are no vertical winds in the lower stratosphere.
Which of the statements given above is/are correct in this context?

1 only
2 only
Both 1 and 2
Neither 1 nor 2 The study of worms which cause parasitic infestations in man is called [UPSC 2008]

Helminthological
Herpetology
Ichthyology
Malacology