Sectional test

Chemistry (Prelims GS) Test 2

• 25 questions
• 20 minutes
• +1 right · −0.25 wrong
• 0 students ranked

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First questions

1. The compound C₇H₇NO₂ has
2. Cl$^{-}$ is not isoelectronic with
3. P$^{3-}$ has gained three electrons, so it has 15 + 3 = 18 electrons. Thus, Cl$^{-}$ (18 electrons) is not isoelectronic with Mg$^{2+}$ (10 electrons). 28. Which one among the following are the correct symbols for the elements gold, tin and lead, respectively ?