Chemistry

raghu Katagall
Quiz by , created over 1 year ago

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

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raghu Katagall
Created by raghu Katagall over 1 year ago
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Question 1

Question
Which of the following compounds contain all the carbon atoms in the same hybridisation state?
Answer
  • H –CΞC-CΞC-H
  • CH3-CΞC-CH3
  • CH2=C=CH2
  • 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
Answer
  • 30
  • 35
  • 46.67
  • 20.8

Question 3

Question
Which among the following is an ambidient nucleophile?
Answer
  • H2O
  • RCN
  • CN-
  • NH3

Question 4

Question
Alkyl groups are ortho-para directing groups because of
Answer
  • Steric effect
  • Electromeric effect
  • Hyperconjugation effect
  • All the three

Question 5

Question
In which of the following, functional isomerism is not possible?
Answer
  • Alcohols
  • Aldehydes
  • Alkyl halides
  • Cyanides

Question 6

Question
The IUPAC name of CH3-CO-CH2-CH2-COOH
Answer
  • 1-hydroxy pentane-1,4-dione
  • 1,4-dioxopentanol
  • 1-carboxybutan-3-one
  • 4-oxopentanoic acid

Question 7

Question
Vitamin B12 contains
Answer
  • Co
  • Mg
  • Mn
  • Fe

Question 8

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

Question
The reason for the greater range of oxidation states in actinoids is attributed to,
Answer
  • Actinoids contraction
  • 5f,6dand 7s levels having comparable energies
  • 4f and 5d levels being close in energies
  • 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?
Answer
  • 3d^2
  • 3d^8
  • 3d^7
  • 3d^5

Question 11

Question
Which of the following statements is wrong regarding lanthanoids?
Answer
  • 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

Question
Glycosidic linkage is an
Answer
  • Amide linkage
  • Ester linkage
  • Ether
  • none of these

Question 13

Question
In chromite ore the oxidation state of iron and chromium are respectively,
Answer
  • +3,+2
  • +3,+6
  • +2,+6
  • +2,+3

Question 14

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

Question
Electronic configuration of a transition element ‘X’ in +3 oxidation state is [Ar]3d5. What is its atomic number?
Answer
  • 25
  • 26
  • 27
  • 24

Question 16

Question
KMnO4 acts as an oxidizing agent in alkaline medium. When alkaline KMnO4 is treated with KI, iodide ion is oxidized to,
Answer
  • I2
  • IO-
  • IO3-
  • IO4-

Question 17

Question
Which of the following sequence is correct regarding field strength of ligands as per spectrochemical series?
Answer
  • SCN- < F- < CN- < CO
  • F- < SCN- < CN-< CO
  • CN- < F- < CO< SCN-
  • SCN- < CO <F- <CN-

Question 18

Question
According to crystal field theory M-L bond in a complex is ,
Answer
  • Purely ionic
  • purely coordinate
  • purely covalent
  • partially covalent

Question 19

Question
Drugs used for relieving pain are called
Answer
  • Antibiotics
  • Analgesics
  • antipyretics
  • anaesthetics

Question 20

Question
Five membered ring structure of glucose is known as
Answer
  • Aromatic
  • Pyranose
  • Furanose
  • Baeyer’s structure

Question 21

Question
The most widely used analgesic for severe pain is
Answer
  • Aspirin
  • Phenacetin
  • paracetomol
  • morphine