Description : The correct statement (s) regarding the binary transition metal carbonyl compounds is (are) (Atomic numbers: Fe = 26, Ni = 28)
Last Answer : The correct statement (s) regarding the binary transition metal carbonyl compounds is (are) (Atomic ... the oxidation state of the metal is increased
Description : EAN of a metal carbonyl `M(CO)_(x)` is 36. If atomic number of metal M is 26, what is the value of x?
Last Answer : EAN of a metal carbonyl `M(CO)_(x)` is 36. If atomic number of metal M is 26, what is the value of x? A. 4 B. 8 C. 5 D. 6
Description : The figure represents the synergic bonding interaction in metal carbonyl complex. On the basis of the explain the following: (i) Strength of Metal-lig
Last Answer : The figure represents the synergic bonding interaction in metal carbonyl complex. On the basis of ... as compared to bond order in carbon monoxide.
Description : All the metal ions contain `t_(2g)^(6)e_(g)^(0)` configuaration. Which of the following complex will be paramagnetic ?
Last Answer : All the metal ions contain `t_(2g)^(6)e_(g)^(0)` configuaration. Which of the following complex will be paramagnetic ? ... `[Fe(CN)_(5)(O_(2))]^(-5)`
Description : Explain the following , giving reason . (a) Transition metal and many of their compounds show paramagnetic behavior (b) The enthalpy of atomisation of the transition metal is high . (c) The Transition metal generally form coloured compounds .
Last Answer : Ans(a) It is due to unpaired electrons . (b) It is due to strong metallic bond and additional Covalent bonds due to presence of unpaired electron in d- orbitals (c) It is due to presence of unpaired electrons ,they undergo d-d transition .
Description : Assertion :- Oxidation number of `Ni` in `[Ni(CO)_(4)]` is zero. ltbr. Reason :- Nickel is bonded to neutral ligand, carbonyl.
Last Answer : Assertion :- Oxidation number of `Ni` in `[Ni(CO)_(4)]` is zero. ltbr. Reason :- Nickel is ... is False. D. If both Assertion & Reason are False.
Description : A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin (Q). Ozonolysis o
Last Answer : A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give ... (S) is: A. B. C. D.
Last Answer : A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration ... respectively, are: A. B. C. D.
Last Answer : A carbonyl compound (P) which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give ... (P) is: A. B. C. D.
Description : In which of the following combination , `beta`-hydroxy carbonyl is obtained ?
Last Answer : In which of the following combination , `beta`-hydroxy carbonyl is obtained ? A. (I)(i)(P) B. (II)(ii)(S) C. (III)(iii)(P) D. (IV)(iv)(Q)
Description : Carbonyl compound which contains `alpha-H` gives aldol condenation reaction in presence of alkaline medium. The reaction between two molecules of acet
Last Answer : Carbonyl compound which contains `alpha-H` gives aldol condenation reaction in presence of alkaline medium. The ... and 2,8-diketone D. All of these
Last Answer : Carbonyl compound which contains `alpha-H` gives aldol condenation reaction in presence of alkaline medium. The reaction ... )H-(CH_(2))_(4)-CH_(3)`
Description : Aromatic carbonyl compound having molecular formula `C_(8)H_(8)O` react with `NH_(2)OH` how many oximes can be formed
Last Answer : Aromatic carbonyl compound having molecular formula `C_(8)H_(8)O` react with `NH_(2)OH` how many oximes can be formed A. 8 B. 10 C. 12 D. 6
Description : (mixture of alkenes) `overset((i) O_(3))underset((ii) Zn//H_(2)O)to` (mixture of carbonyl compounds). The incorrect statement is
Last Answer : (mixture of alkenes) `overset((i) O_(3))underset((ii) Zn//H_(2)O)to` (mixture of ... KOH D. Only two carbonyl compounds give positive idoform test
Description : How many of the following carbonyl compound will give two products after reaction with `NH_(2)OH` :
Last Answer : How many of the following carbonyl compound will give two products after reaction with `NH_(2)OH` :
Description : Which of the following carbonyl compound will give two products after reaction with `NH_(2)OH`:
Last Answer : Which of the following carbonyl compound will give two products after reaction with `NH_(2)OH`:
Description : What is the EAN value of `W(CO)_(6)` carbonyl ompounds ?
Last Answer : What is the EAN value of `W(CO)_(6)` carbonyl ompounds ?
Description : At the lowest energy level α-helix of polypeptide chain is stabilised (A) By hydrogen bonds formed between the H of peptide N and the carbonyl O of the residue (B) Disulphide bonds (C) Non polar bonds (D) Ester bonds
Last Answer : Answer : A
Description : Which one of the following can be oxidized to the corresponding carbonyl compound - (1) O-Nitrophenol (2) Phenol (3) 2-methyl-2-hydroxy propane (4) 2-hydroxy propane
Last Answer : (4) 2-hydroxy propane
Description : Tear gas is – (1) Chloroprene (2) Carbonyl chloride (3) Nitrous oxide (4) Bleaching powder
Last Answer : (2) Carbonyl chloride Explanation: Tear gas, formally known as a lachrymatory agent or ladnymator (from lacrima meaning "tear" in Latin), is a non-lethal chemical weapon that ... temporary blindness, etc. Lachrymators are thought to act by attacking sulphydryl functional groups in enzymes.
Description : The two functional groups characteristic of sugars are (a) hydroxyl and methyl (b) carbonyl and methyl (c) carbonyl and phosphate (d) carbonyl and hydroxyl.
Last Answer : (d) carbonyl and hydroxyl.
Description : Which one of the following compounds form zwitterions? (a) carbonyl compounds (b) amino acids (c) phenols (d) heterocyclic compounds
Last Answer : amino acids
Description : Carbonyl chloride reacts with ammonia to give (a) Urea (b) Acetone (c) Acetamide (d) Chloroform
Last Answer : Urea
Description : Which of the following statements describes the first step in the mechanism of the aldol condensation? (a) An alpha hydrogen is abstracted by the base to form an enolate anion. (b) A nucleophilic base attacks ... by the base ion. (d) The alpha hydrogen is abstracted by an acid to the enolate anion.
Last Answer : An alpha hydrogen is abstracted by the base to form an enolate anion
Description : Which of the following is the correct ranking in decreasing order of relative Boiling Point of carbonyl containing compounds? (a) primary amide > carboxylic acid >> ester ~ acyl chloride ~ aldehyde ~ ketone ... chloride ~ amide (d) carboxylic acid > amide >> ester ~ acyl chloride ~ aldehyde ~ ketone
Last Answer : primary amide > carboxylic acid >> ester ~ acyl chloride ~ aldehyde ~ ketone
Description : What is the hybridization and geometry of the carbonyl carbon in carboxylic acids and their derivatives? (a) sp3, tetrahedral (b) sp2, trigonal planar (c) sp2, tetrahedral (d) sp3, trigonal planar
Last Answer : sp2, trigonal planar
Description : What is the hybridization of the carbonyl oxygen in carboxylic acids? (a) sp (b) sp2 (c) sp3 (d) s-sp2
Last Answer : sp2
Description : Why do aldehydes undergo nucleophilic addition reactions while esters undergo nucleophilic acyl substitution reactions? (a) The carbonyl carbon of an ester is more electrophilic than that of an aldehyde. (b) ... adds to an aldehyde, neither H− nor R− can be eliminated since they are strongly basic
Last Answer : Once the nucleophile adds to an aldehyde, neither H− nor R− can be eliminated since they are strongly basic
Description : An organic compound (A), C3H8O, on oxidation gives (B), C3H6O. The compound (B) could be (a) a carbonyl compound (b) an alcohol (c) a carboxylic acid (d) an ether
Last Answer : a carbonyl compound
Description : Which statement about the carbonyl group of ketones and aldehydes is true? I. It can attract nucleophiles. II. It can attract electrophiles. III. It tends to undergo addition reactions. IV. It tends to undergo substitution reactions. (a) I and III (b) II and IV (c) I, II, and III (d) I, III, and IV
Last Answer : I, II, and III
Description : What property of low-molecular weight aldehydes and ketones accounts for the magnitude of their boiling points? (a) The ability to form strong H-bonds between their molecules. (b) The ability of ... other polar molecules. (d) The ability of the carbonyl group to attract electrophiles and form bonds.
Last Answer : The ability of the polar carbonyl group to attract other polar molecules.
Description : Which statement about the carbonyl group is NOT true? (a) The carbonyl carbon is sp2 hybridized. (b) The bond angles among the three atoms attached to the carbonyl carbon are 120°. (c) ... attached to the carbonyl carbon form a nonplanar geometry. (d) The carbonyl group forms resonance structures.
Last Answer : The three atoms attached to the carbonyl carbon form a nonplanar geometry
Description : The carbon atom of a carbonyl group is (a) sp hybridized (b) sp2 hybridized (c) sp3 hybridized (d) None of these
Last Answer : sp2 hybridized
Description : A functional group designated—COOH is known as a/an a. Carboxyl. b. Carbonyl. c. Amino. d. Hydroxyl.
Last Answer : a. Carboxyl.
Description : The two functional groups characteristic of sugars are (1) hydroxyl and methyl (2) carbonyl and methyl (3) carbonyl and phosphate (4) carbonyl and hydroxyl
Last Answer : (4) carbonyl and hydroxyl
Description : Tear gas is : (1) Chloroprene (2) Carbonyl chloride (3) Nitrous oxide (4) Bleaching powder
Last Answer : Carbonyl chloride
Description : [Fe(H2O)6]3+ is strongly paramagnetic whereas [Fe(CN)6]3- is weakly paramagnetic. Explain. (At. no. Fe = 26) -Chemistry
Last Answer : In both the cases, Fe is in oxidation state +3. Outer electronic configuration of Fe+3 is : In the presence of CN-, the 3d electrons pair up leaving only one unpaired electron. The ... sp3d2 forming an outer orbital complex. As it contains five unpaired electrons so it is strongly paramagnetic. .
Description : What is the relative permeability of a paramagnetic material? -General Knowledge
Last Answer : The answer is 'Greater than unity'
Description : A hydrogen atom is paramagnetic. What is a hydrogen molecule? -Do You Know?
Last Answer : answer:
Description : What is paramagnetic ?
Last Answer : Substances that are weakly attracted by a magnetic field are called paramagnetic. Any substance that has odd or unpaired electrons in its atom ; They tend to be paramagnetic. This is because the rotation or spinning of unpaired electrons in an atom causes a magnetic moment.
Description : What is Paramagnetic Material ?
Last Answer : Chromium , tungsten , aluminum , magnesium etc. are weakly attracted by strong magnets. These are paramagnetic substances. The magnetic field of paramagnetic matter is called paramagnetism.
Description : Among the following , the paramagnetic compound is
Last Answer : Among the following , the paramagnetic compound is A. `Na_(2)O_(2)` B. `O_(3)` C. `Na_(2)O` D. `KO_(2)`
Description : The pair(s) of reagents that yield paramagnetic species is/are
Last Answer : The pair(s) of reagents that yield paramagnetic species is/are A. Na and excess of `NH_(3)` B. K and ... `HNO_(3)` D. `O_(2)` and 2-ethylanthraquinol