Chemistry

Question 1 of 21

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Which of the following compounds contain all the carbon atoms in the same hybridisation state?

Select one of the following:

  • H –CΞC-CΞC-H

  • CH3-CΞC-CH3

  • CH2=C=CH2

  • CH2=CHCN

Question 2 of 21

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1.2g of organic compound liberates ammonia during Kjeldahlization which takes 30ml of 1M HCl . The percentage of nitrogen in organic compound is

Select one of the following:

  • 30

  • 35

  • 46.67

  • 20.8

Question 3 of 21

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Which among the following is an ambidient nucleophile?

Select one of the following:

  • H2O

  • RCN

  • CN-

  • NH3

Question 4 of 21

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Alkyl groups are ortho-para directing groups because of

Select one of the following:

  • Steric effect

  • Electromeric effect

  • Hyperconjugation effect

  • All the three

Question 5 of 21

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In which of the following, functional isomerism is not possible?

Select one of the following:

  • Alcohols

  • Aldehydes

  • Alkyl halides

  • Cyanides

Question 6 of 21

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The IUPAC name of CH3-CO-CH2-CH2-COOH

Select one of the following:

  • 1-hydroxy pentane-1,4-dione

  • 1,4-dioxopentanol

  • 1-carboxybutan-3-one

  • 4-oxopentanoic acid

Question 7 of 21

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Vitamin B12 contains

Select one of the following:

  • Co

  • Mg

  • Mn

  • Fe

Question 8 of 21

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Arrange the following carbanions in order of their decreasing stability.
(CH3)3C- -CCl3 (CH3)2CH- C6H5-CH2-

Select one of the following:

  • (CH3)2CH-> -CCl3 > C6H5-CH2-> (CH3)3C-

  • -CCl3 > C6H5-CH2- > (CH3)2CH- > (CH3)3C-

  • (CH3)3C- > (CH3)2CH- > C6H5-CH2- > -CCl3

  • C6H5-CH2- > -CCl3 > (CH3)3C- > (CH3)2CH-

Question 9 of 21

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The reason for the greater range of oxidation states in actinoids is attributed to,

Select one of the following:

  • Actinoids contraction

  • 5f,6dand 7s levels having comparable energies

  • 4f and 5d levels being close in energies

  • The radioactive nature of actinoids

Question 10 of 21

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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?

Select one of the following:

  • 3d^2

  • 3d^8

  • 3d^7

  • 3d^5

Question 11 of 21

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Which of the following statements is wrong regarding lanthanoids?

Select one of the following:

  • Ln(III) compounds are predominantly ionic in nature

  • Ln(III) hydroxides are mainly basic in nature

  • The ionic size of Ln (III) ions decreases with increase of atomic number

  • Ln(III) compounds are generally colourless.

Question 12 of 21

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Glycosidic linkage is an

Select one of the following:

  • Amide linkage

  • Ester linkage

  • Ether

  • none of these

Question 13 of 21

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In chromite ore the oxidation state of iron and chromium are respectively,

Select one of the following:

  • +3,+2

  • +3,+6

  • +2,+6

  • +2,+3

Question 14 of 21

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Highest oxidation state of manganese in fluoride is +4 (MnF4) but highest oxidation state in oxides is +7 (Mn2O7) because,

Select one of the following:

  • Fluorine is more electronegative than oxygen

  • Fluorine does not possess d-orbitals

  • Fluorine stabilizes lower oxidation state

  • In covalent compounds fluorine can form single bond only while oxygen forms double bond.

Question 15 of 21

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Electronic configuration of a transition element ‘X’ in +3 oxidation state is [Ar]3d5. What is its atomic number?

Select one of the following:

  • 25

  • 26

  • 27

  • 24

Question 16 of 21

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KMnO4 acts as an oxidizing agent in alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidized to,

Select one of the following:

  • I2

  • IO-

  • IO3-

  • IO4-

Question 17 of 21

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Which of the following sequence is correct regarding field strength of ligands as per spectrochemical series?

Select one of the following:

  • SCN- < F- < CN- < CO

  • F- < SCN- < CN-< CO

  • CN- < F- < CO< SCN-

  • SCN- < CO <F- <CN-

Question 18 of 21

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According to crystal field theory M-L bond in a complex is ,

Select one of the following:

  • Purely ionic

  • purely coordinate

  • purely covalent

  • partially covalent

Question 19 of 21

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Drugs used for relieving pain are called

Select one of the following:

  • Antibiotics

  • Analgesics

  • antipyretics

  • anaesthetics

Question 20 of 21

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Five membered ring structure of glucose is known as

Select one of the following:

  • Aromatic

  • Pyranose

  • Furanose

  • Baeyer’s structure

Question 21 of 21

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The most widely used analgesic for severe pain is

Select one of the following:

  • Aspirin

  • Phenacetin

  • paracetomol

  • morphine

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raghu Katagall
Quiz by , created 6 months ago

Quiz on Chemistry, created by raghu Katagall on 11/09/2017.

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raghu Katagall
Created by raghu Katagall 6 months ago
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