DAT Organic Chemistry. We covered all the DAT Organic Chemistry in this post for free so that you can practice well for the exam.
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MCQ on DAT Organic Chemistry for Students
CNG used in automobiles to check pollution mainly consists of
(a) CH4
(b) CO2
(c) N₂
(d) H₂
Option a – CH4
Pyrethrin used in mosquito coil is obtained from
(a) a seed plant
(b) an insect
(c) a bacterium
(d) a fungus
Option a – a seed plant
Biogas mainly consists of
(a) carbon dioxide and hydrogen
(b) hydrogen and methane
(c) carbon dioxide and methane
(d) hydrogen and oxygen
Option c – carbon dioxide and methane
C11-L-methyl-methionine is used for a
(a) brain tumor and parathyroid imaging
(b) stomach analysis
(c) bone imaging
(d) live imaging
Option a – brain tumor and parathyroid imaging
Petroleum gas is a mixture of ethane, propane, and butane. What are its major constituents?
(a) Ethane
(b) Propane
(c) Butane
(d) All three are present in equal proportions
Option c – Butane
The new strain of bacteria produced by biotechnology in the alcohol industry is
(a) Escherichia coli
(b) Saccharomyces cerevisiae
(c) Bacillus subtilis
(d) Pseudomonas putida
Option d – Pseudomonas putida
Soap helps in cleaning clothes because
(a) the chemical of soap changes
(b) it increases the surface tension of the solution
(c) it absorbs the dirt
(d) it lowers the surface tension of the solution
Option d – it lowers the surface tension of the solution
Which of the following options is false about a soap?
(a) The soap solution in water is neutral and can be used to wash all kinds of fabrics
(b) Soap forms lather only in soft water
(c) Soap is a metallic salt of higher fatty acids
(d) Soap cannot be used in slightly acidic medium
Which of the following hydrocarbons undergo additional reactions? C₂H6, C3H8, C3H6, C₂H₂, and CH4
(a) C₂H6 and C3H8
(b) C3H6 and C₂H₂
(c) CH4 and C₂H6
(d) C₂H8 and C₂H₂
Option b – C3H6 and C₂H₂
The order of appearance of the following with increasing temperature during the refining of crude oil is
(a) Kerosene, gasoline, diesel
(b) Diesel, gasoline, kerosene
(c) Gasoline, kerosene, diesel
(d) Gasoline, diesel, kerosene
Option c – Gasoline, kerosene, diesel
What is a “Kiss of death”?
(a) A flower whose smell was the basis of a discovery on the smell that led to the award of the 2004 Nobel Prize in Medicine.
(b) A protein degradation mechanism whose discovery ultimately won the scientists the 2004 Nobel Prize in Chemistry.
(c) A good wine flavor working on which scientists won the 2004 Nobel Prize in Chemistry.
(d) A network in the brain associated with smell whose discovery led the scientists to win the 2004 Nobel Prize in Physiology and Medicine.
Option b – A protein degradation mechanism whose discovery ultimately won the scientists the 2004 Nobel Prize in Chemistry
Why are large alkane molecules cracked to form smaller molecules to use as fuel?
(a) It forms only 20% of the crude oil.
(b) To meet the demand for small alkane molecules.
(c) Crude oil does not contain small alkane molecules.
(d) Small alkane molecules can be polymerized.
Option b – To meet the demand for small alkane molecules
Which physical property of the alkanes does not increase as relative molecular mass increases?
(a) Boiling point
(b) Flammability
(c) Melting point
(d) Viscosity
Option b – Flammability
One mole of hydrocarbon ‘X’ reacted completely with one mole of hydrogen gas in the presence of a heated catalyst. What could be the formula of ‘X’?
(a) C₂H6
(b) C4H10
(c) C5H10
(d) C7H16
Option c – C5H10
A hydrocarbon has a molecular formula of C6H12. It does not react with hydrogen to give C6H14 nor does it react with chlorine to give C6H12C12. The hydrocarbon C6H12 is. A. A saturated hydrocarbon B. An unsaturated hydrocarbon C. An open chain hydrocarbon D. A cyclo-alkane
(a) A and B
(b) C and D
(c) D and B
(d) A and D
Option d – A and D
An organic compound is a clear liquid having a molecular C4H8O. It has an open chain structure. Without a formula any carbon-carbon double bond. The compound can be (A) alcohol (B) an ester (C) an aldehyde (D) a ketone
(a) (A) and (B)
(b) (C) and (D)
(c) (B) and (D)
(d) (D) and (A)
Option b – (C) and (D)
When ethane is burnt in excess of air, the products of combustion are
(a) C and H₂O
(b) CO and H₂O
(c) CO₂ and H₂
(d) CO₂ and H₂O
Option d – CO₂ and H₂O
The number of oxygen molecules used in the combustion of 1 molecule of ethanol is
(a) 1
(b) 2
(c) 3
(d) 4
Option c – 3
Which of the following is incorrectly matched
(a) vinegar → carboxylic acid
(b) C₂H6 → alkane
(c) ethanol →alcohol
(d) methanol →ketone
Option d – methanol →ketone
What is the IUPAC Name of t-butyl alcohol?
(a) Butanol-2
(b) 2-Methyl propan-2-ol
(c) Butanol-1
(d) Propanol 2
Option b – 2-Methyl propan-2-ol
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