CSIR NET Chemistry Orientation Quiz

Which of the following obeys 18-electron rule?

• Fe(CO)₅

• Ni(CO)₄

• Cr(CO)₆

• All of the above

Which lanthanide ion shows maximum paramagnetism?

• Ce³⁺

• Gd³⁺

• Eu²⁺

• Yb³⁺

Bioorthogonal chemistry refers to chemical reactions that:

• Occur only at high temperatures

• Occur in water-insoluble environments

• Occur inside living systems without disrupting native biochemical processes

• Are used only in industrial synthesis

The Woodward-Fieser rules are applied to predict:

• IR absorption maxima

• UV-visible λ_max

• Mass fragmentation pattern

• NMR splitting

"Click chemistry" is a term coined by:

• K. Barry Sharpless

• Frances Arnold

• Carolyn Bertozzi

• Jean-Marie Lehn

Debye-Hückel limiting law is applicable to:

• Strong electrolytes at high concentration

• Weak electrolytes at low concentration

• Strong electrolytes at infinite dilution

• None of the above

Which of the following is used as an internal standard in NMR?

• TFA

• DMSO

• TMS

• CDCl₃

Which metal ion is present in vitamin B12?

• Fe

• Co

• Zn

• Cu

Which award is considered India's highest scientific honor and sometimes a stepping stone to Nobel?

• Bharat Ratna

• Shanti Swarup Bhatnagar Prize

• Infosys Prize

• INSA Fellowship

In aldol condensation, the enolate ion acts as a:

• Nucleophile

• Electrophile

• Base

• Leaving group