Question 1
Question
Which of the following compounds contain all the carbon atoms in the same hybridisation state?
Answer
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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
Question 2
Question
1.2g of organic compound liberates ammonia during Kjeldahlization which takes 30ml of 1M HCl . The percentage of nitrogen in organic compound is
Question 3
Question
Which among the following is an ambidient nucleophile?
Question 4
Question
Alkyl groups are ortho-para directing groups because of
Answer
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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
Question 5
Question
In which of the following, functional isomerism is not possible?
Answer
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Alcohols
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Aldehydes
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Alkyl halides
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Cyanides
Question 6
Question
The IUPAC name of CH3-CO-CH2-CH2-COOH
Question 7
Question
Vitamin B12 contains
Question 8
Question
Arrange the following carbanions in order of their decreasing stability.
(CH3)3C- -CCl3 (CH3)2CH- C6H5-CH2-
Answer
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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-
Question 9
Question
The reason for the greater range of oxidation states in actinoids is attributed to,
Answer
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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
Question 10
Question
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?
Question 11
Question
Which of the following statements is wrong regarding lanthanoids?
Answer
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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.
Question 12
Question
Glycosidic linkage is an
Answer
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Amide linkage
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Ester linkage
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Ether
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none of these
Question 13
Question
In chromite ore the oxidation state of iron and chromium are respectively,
Question 14
Question
Highest oxidation state of manganese in fluoride is +4 (MnF4) but highest oxidation state in oxides is +7 (Mn2O7) because,
Answer
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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.
Question 15
Question
Electronic configuration of a transition element ‘X’ in +3 oxidation state is [Ar]3d5. What is its atomic number?
Question 16
Question
KMnO4 acts as an oxidizing agent in alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidized to,
Question 17
Question
Which of the following sequence is correct regarding field strength of ligands as per spectrochemical series?
Answer
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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-
Question 18
Question
According to crystal field theory M-L bond in a complex is ,
Answer
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Purely ionic
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purely coordinate
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purely covalent
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partially covalent
Question 19
Question
Drugs used for relieving pain are called
Answer
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Antibiotics
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Analgesics
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antipyretics
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anaesthetics
Question 20
Question
Five membered ring structure of glucose is known as
Answer
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Aromatic
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Pyranose
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Furanose
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Baeyer’s structure
Question 21
Question
The most widely used analgesic for severe pain is
Answer
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Aspirin
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Phenacetin
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paracetomol
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morphine