Pregunta 1
Pregunta
Which of the following compounds contain all the carbon atoms in the same hybridisation state?
Respuesta
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H –CΞC-CΞC-H
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CH3-CΞC-CH3
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CH2=C=CH2
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CH2=CHCN
Pregunta 2
Pregunta
1.2g of organic compound liberates ammonia during Kjeldahlization which takes 30ml of 1M HCl . The percentage of nitrogen in organic compound is
Pregunta 3
Pregunta
Which among the following is an ambidient nucleophile?
Pregunta 4
Pregunta
Alkyl groups are ortho-para directing groups because of
Respuesta
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Steric effect
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Electromeric effect
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Hyperconjugation effect
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All the three
Pregunta 5
Pregunta
In which of the following, functional isomerism is not possible?
Respuesta
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Alcohols
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Aldehydes
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Alkyl halides
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Cyanides
Pregunta 6
Pregunta
The IUPAC name of CH3-CO-CH2-CH2-COOH
Pregunta 7
Pregunta
Vitamin B12 contains
Pregunta 8
Pregunta
Arrange the following carbanions in order of their decreasing stability.
(CH3)3C- -CCl3 (CH3)2CH- C6H5-CH2-
Respuesta
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(CH3)2CH-> -CCl3 > C6H5-CH2-> (CH3)3C-
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-CCl3 > C6H5-CH2- > (CH3)2CH- > (CH3)3C-
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(CH3)3C- > (CH3)2CH- > C6H5-CH2- > -CCl3
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C6H5-CH2- > -CCl3 > (CH3)3C- > (CH3)2CH-
Pregunta 9
Pregunta
The reason for the greater range of oxidation states in actinoids is attributed to,
Respuesta
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Actinoids contraction
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5f,6dand 7s levels having comparable energies
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4f and 5d levels being close in energies
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The radioactive nature of actinoids
Pregunta 10
Pregunta
The magnetic nature of the element depends on the presence of unpaired electrons . Identify the configuration of the transition element which shows highest magnetic moment?
Pregunta 11
Pregunta
Which of the following statements is wrong regarding lanthanoids?
Respuesta
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Ln(III) compounds are predominantly ionic in nature
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Ln(III) hydroxides are mainly basic in nature
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The ionic size of Ln (III) ions decreases with increase of atomic number
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Ln(III) compounds are generally colourless.
Pregunta 12
Pregunta
Glycosidic linkage is an
Respuesta
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Amide linkage
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Ester linkage
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Ether
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none of these
Pregunta 13
Pregunta
In chromite ore the oxidation state of iron and chromium are respectively,
Pregunta 14
Pregunta
Highest oxidation state of manganese in fluoride is +4 (MnF4) but highest oxidation state in oxides is +7 (Mn2O7) because,
Respuesta
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Fluorine is more electronegative than oxygen
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Fluorine does not possess d-orbitals
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Fluorine stabilizes lower oxidation state
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In covalent compounds fluorine can form single bond only while oxygen forms double bond.
Pregunta 15
Pregunta
Electronic configuration of a transition element ‘X’ in +3 oxidation state is [Ar]3d5. What is its atomic number?
Pregunta 16
Pregunta
KMnO4 acts as an oxidizing agent in alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidized to,
Pregunta 17
Pregunta
Which of the following sequence is correct regarding field strength of ligands as per spectrochemical series?
Respuesta
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SCN- < F- < CN- < CO
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F- < SCN- < CN-< CO
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CN- < F- < CO< SCN-
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SCN- < CO <F- <CN-
Pregunta 18
Pregunta
According to crystal field theory M-L bond in a complex is ,
Respuesta
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Purely ionic
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purely coordinate
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purely covalent
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partially covalent
Pregunta 19
Pregunta
Drugs used for relieving pain are called
Respuesta
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Antibiotics
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Analgesics
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antipyretics
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anaesthetics
Pregunta 20
Pregunta
Five membered ring structure of glucose is known as
Respuesta
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Aromatic
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Pyranose
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Furanose
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Baeyer’s structure
Pregunta 21
Pregunta
The most widely used analgesic for severe pain is
Respuesta
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Aspirin
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Phenacetin
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paracetomol
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morphine