CUET · CHEMISTRY · PYQ PAPER 2023
The higher stability of metal carbonyls is very evident on the basis of spectrochemical series. Identify the incorrect statement(s) about metal carbonyls.
A. The metal-carbon bond has both \(\sigma\) and \(\pi\) characters.
B. Metal-carbon \(\sigma\) bond is formed by donation of lone pair of electrons on carbonyl carbon into vacant \(d\)-orbital of metal.
C. Metal-ligand bond has synergic effect.
D. Transition metals never have zero oxidation state in carbonyls.
E. Metal-carbon \(\pi\) bond is formed by donation of electrons from antibonding molecular orbital of CO to metal.
Choose the correct answer from the options given below :
- A A and C only
- B A and B only
- C C and D only
- D D and E only
Answer & Solution
Correct Answer
(D) D and E only
Step-by-step Solution
Detailed explanation
Statements D and E are incorrect.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from CHEMISTRY
- The correct cell representation for the following reaction is
\(Mg(s)+2 Ag^{+}(0.0001 M) \rightarrow Mg^{2+}(0.130 M)+2 Ag(s)\)CUET 2025 Easy - Which of the metal is used in catalytic hydrogenation?CUET 2025 Hard
- A compound is formed by 2 elements P and Q. Atoms of element Q (as anions) makes ccp and those of P (as cations) fill all tetrahedral voids and also occupy half of the octahedral voids. What is the correct formula of this compound?CUET 2023 Medium
- What product(s) is (are) formed when an alkyl halide undergoes ammonolysis?
(A) Primary amine
(B) Secondary amine
(C) Quaternary ammonium salt
(D) Tertiary amine
Choose the correct answer from the options given below:CUET 2025 Medium - Hybridization of carbon atoms attached with halogens in haloalkanes \\& haloarenes areCUET 2023 Medium
- The aqueous solution containing which one of the following ions will be colourless? (Atomic numbers: \(Sc = 21, Fe = 26, Ti = 22, Mn = 25\))CUET 2023 Medium
More PYQs from CUET
- The number of letters posted in a certain city on each day for a week is given as follows : 40, 55, 28, 25, 31, 52, 43
Which of the following is NOT an entry in the three-day moving averages?CUET 2025 Easy - The amines which are soluble in water
(A) Methanamine
(B) Ethanamine
(C) Propanamine
(D) Benzylamine
Choose the correct answer from the options given below:CUET 2023 Hard - Arrange these in ascending order of wavelength while propagating through different medium.
(A) Light propagating in air
(B) Light propagating in water
(C) Light propagating in diamond
(D) Light propagating in glass
Choose the correct answer from the options given below :CUET 2023 Hard - The females of the following mammals exhibit a menstrual cycle.CUET 2023 Medium
- Match List - I with List - II.
Choose the correct answer from the options given below:LIST-I LIST-I (A) \(\csc ^{-1} x\) (I) \((0, \pi)\) (B) \(\sec ^{-1} x\) (II) \(\left[-\frac{\pi}{2}, \frac{\pi}{2}\right]-\{0\}\) (C) \(\tan ^{-1} x\) (III) \(\left(-\frac{\pi}{2}, \frac{\pi}{2}\right)\) (D) \(\cot ^{-1} x\) (IV) \([0, \pi]-\left\{\frac{\pi}{2}\right\}\) CUET 2023 Easy - A piece of silver and another of silicon are cooled from 15 ℃ to 3 ℃. What will be the effect on resistance of each?CUET 2025 Medium