PadhaiBy Astra Cloud
Search notes and questions
Ask a doubtProgramsNoticesGPA calculatorMy studyClassroom

Tribhuvan University

BSc CSITBachelor of Science in Computer Science and Information TechnologyBCABachelor of Computer ApplicationBITBachelor of Information TechnologyBIMBachelor of Information ManagementBBABachelor of Business AdministrationBBSBachelor of Business StudiesBBMBachelor of Business ManagementBITMBachelor of Information Technology Management

Pokhara University

BE Computer (PU)Bachelor of Engineering in Computer EngineeringBBA (PU)Bachelor of Business Administration (Pokhara University)

National Examinations Board (+2)

Class 10Class 10 (SEE)+2 Science+2 Science (Class 11 and 12)+2 Management+2 Management (Class 11 and 12)+2 Humanities+2 Humanities (Class 11 and 12)
All universities and programs

Chem Chemistry

ChemistryNEB 2081 (MCQs)

Which of the following molecules does not act as a ligand ? a) CO2 b) NH3 c) H2O d) CO

1

Answer

· Based on the official syllabus and past papers
Updated

A ligand is a molecule or ion that donates a pair of electrons to a central metal ion to form a coordinate bond. Ligands must have at least one lone pair of electrons or a π-electron system capable of donating electron density.

  • and are classic examples of ligands because they have lone pairs on nitrogen and oxygen, respectively.
  • is also a ligand due to its π-electron system that can back-bond with metal centers.
  • , however, is linear and symmetric with no lone pairs on carbon or oxygen. It lacks a suitable electron pair to donate to a metal ion, making it non-coordinating under normal conditions.

Thus, the correct answer is (a) .

Discussion

Loading…

More Chemistry questions

To estimate the chloride ion present in tap water, volumetric analysis has been commonly used in laboratory. Which of the following solutions can be used for…NEB 2082 (MCQs)1The half life of a certain reaction is 50 seconds and it remains constant even if the initial concentration of the reactant is doubled. What is the order of…NEB 2082 (MCQs)1Gibbs Helmholtz equation is represented as : = T . For what value of will the reaction be spontaneous ? a) Positive b) Zero c) Negative d) InfiniteNEB 2082 (MCQs)1Standard reduction potential values for P, Q, R and S are +0.34V, 0.76V, +0.0V and 3.05V, respectively. What is the correct order of their reducing power ? a)…NEB 2082 (MCQs)1A deep blue complex is formed when conc. ammonium hydroxide is added to an aqueous solution of CuSO4 . Which of the following formulae represents the complex…NEB 2082 (MCQs)1Which of the following is the maximum possible oxidation state of the transition metals in 3d series ? a) +3 b) +6 c) +7 d) +8NEB 2082 (MCQs)1

All Chemistry old questions