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mcq on Gaseous State for NEET Students
Choose the INCORRECT statement from the following:
(A) All monosaccharides, whether aldoses or ketoses, act as reducing sugars.
(B) Polysaccharides are classified as non-sugars.
(C) Glucose is the sweetest among sucrose, glucose, and fructose.
(D) Monosaccharides serve as the fundamental units of carbohydrates.
Option c – Glucose is the sweetest among sucrose, glucose, and fructose.
When an Organic compound ‘A’ is reduced, it forms ‘B’. Upon treating ‘B’ with chloroform and alcoholic KOH, compound ‘C’ is produced. Catalytic hydrogenation of ‘C’ gives compound ‘D’. If ‘A’ is nitrobenzene, then what is compound ‘D’?
(A) N-methylaniline
(B) N-ethylaniline
(C) Methanamine
(D) Benzenamine
Option a – N-methylaniline
Vitamins that dissolve in fats and oils include:
(A) A, D
(B) A, B
(C) B, C
(D) D, C
Option a – A, D
A copolymer made from alternating ethylene and vinyl chloride monomers has what percentage by Mass of ethylene?
(A) 28.02
(B) 30.94
(C) 62.5
(D) 90.5
Option b – 30.94
Saran is made by polymerizing:
(A) Vinyl chloride with acrylonitrile
(B) Ethylene glycol with phthalic Acid
(C) Vinyl chloride with vinylidene chloride
(D) Diethyl carbonate with bisphenol A
Option c – Vinyl chloride with vinylidene chloride
The compound with the highest pKb value is:
(A) C₆H₅NHCH₃
(B) (CH₃CH₂)₂NH
(C) (CH₃)₂NH
(D) C₆H₅-NH-C₆H₅
Option d – C₆H₅-NH-C₆H₅
Ethylene glycol reacts with compound X to produce Terylene and with compound Y to produce Glyptal. Identify X and Y:
(A) Dimethyl terephthalate and phthalic Acid
(B) Dimethyl terephthalate and adipic Acid
(C) Hexamethylenediamine and phthalic Acid
(D) Dimethyl terephthalate and acrylonitrile
Option a – Dimethyl terephthalate and phthalic Acid
Which of the following includes only copolymers?
(A) SBR, glyptal, nylon-6,6
(B) Nylon-6, butyl rubber, neoprene
(C) Polythene, polyester, PVC
(D) Melamine, bakelite, teflon
Option a – SBR, glyptal, nylon-6,6
A compound P, upon reduction using tin and concentrated HCl, gives an amine Q. Q cannot be synthesized by Gabriel phthalimide method but can be obtained via Hoffmann bromamide degradation of benzamide. Identify compound P:
(A) Benzoic Acid
(B) Aniline
(C) Nitrobenzene
(D) Benzonitrile
Option c – Nitrobenzene
Which of the following are homopolymers?
(A) SBR, melamine
(B) Bakelite, PVC
(C) Nylon-6, starch
(D) Nylon-6,6, glyptal
Option c – Nylon-6, starch
Find the INCORRECT statement from the list:
(A) Diphenylamine is a tertiary amine.
(B) Toluidine is an aromatic primary amine.
(C) Benzylamine is a primary amine.
(D) Cyclopentylamine is a primary amine.
Option a – Diphenylamine is a tertiary amine.
Enzymes catalyze reactions efficiently because they:
(A) Lower the activation energy needed for the reaction
(B) Form a strong bond with the substrate
(C) Reduce the bond energies of all substrate molecules
(D) Increase the reaction’s free energy
Option a – Lower the activation energy needed for the reaction
Which one of the following is NOT a B vitamin?
(A) Ascorbic Acid
(B) Riboflavin
(C) Niacin
(D) Pyridoxine
Option a – Ascorbic Acid
Gabriel phthalimide synthesis cannot be used to prepare which amine?
(A) Butan-1-amine
(B) Propan-2-amine
(C) 2-Phenylethanamine
(D) N-Methylethanamine
Option d – N-Methylethanamine
Which statement regarding amines is INCORRECT?
(A) Alkylamines are more basic than ammonia.
(B) Alkylamines have higher basicity than arylamines.
(C) Primary alkylamines react with nitrous Acid to form Alcohols.
(D) Primary arylamines yield Phenols when treated with nitrous Acid.
Option d – Primary arylamines yield Phenols when treated with nitrous acid.
Which statement is CORRECT?
(A) Aniline forms anilinium ion in highly acidic conditions.
(B) The amino group in aniline is meta-directing.
(C) Maximum electron density in aniline is found at meta positions.
(D) Anilinium ion has greater stability than aniline.
Option a – Aniline forms anilinium ion in highly acidic conditions.
Which amino acid is categorized as neutral and hydrophobic?
(A) Aspartic acid
(B) Histidine
(C) Phenylalanine
(D) Lysine
Option c – Phenylalanine
Choose the correct statement about LDPE and HDPE:
(A) Both are examples of addition Polymers
(B) Both possess identical melting points
(C) Both have linear Molecular structures
(D) Both are synthesized under the same conditions
Option a – Both are examples of addition Polymers
Among the following, which is the weakest Base?
(A) C₆H₅NH₂
(B) p-Methoxy aniline
(C) p-Methyl aniline
(D) p-Sulfonic aniline
Option d – p-Sulfonic aniline
Which of the following compounds yields ethylamine upon reduction?
(A) Acetoxime
(B) Propanenitrile
(C) Acetamide
(D) Nitropropane
Option c – Acetamide
Arrange the following amino Acids in increasing order of their isoelectric points: Alanine, Glutamic acid, Arginine
(A) Alanine < Glutamic acid < Arginine
(B) Glutamic acid < Alanine < Arginine
(C) Alanine < Arginine < Glutamic acid
(D) Glutamic acid < Arginine < Alanine
Option b – Glutamic acid < Alanine < Arginine
The sulfur content in rubber used for manufacturing automobile tires is:
(A) 3–10%
(B) 10–20%
(C) 20–30%
(D) 40–50%
Option a – 3–10%
A compound ‘X’ undergoes polymerization in the presence of a peroxide initiator to form Orlon, a synthetic fiber similar to wool. What is ‘X’?
(A) Styrene
(B) Tetrafluoroethylene
(C) Vinyl chloride
(D) Acrylonitrile
Option d – Acrylonitrile
Stachyose is classified as a:
(A) Monosaccharide
(B) Disaccharide
(C) Trisaccharide
(D) Tetrasaccharide
Option d – Tetrasaccharide
Which of the following accurately describes PVC?
(I) Linear polymer
(II) Network polymer
(III) Thermosetting polymer
(IV) Thermoplastic polymer
(V) Copolymer
(VI) Homopolymer
(A) I, III, VI
(B) I, IV, V
(C) II, IV, V
(D) I, IV, VI
Option d – I, IV, VI
Choose the correct option:
(A) Lactose is a reducing sugar, whereas maltose is not
(B) Cellobiose shows reducing properties, but sucrose does not
(C) Cellobiose is a trisaccharide, while sucrose is a disaccharide
(D) Lactose is a disaccharide and maltose is a monosaccharide
Option b – Cellobiose shows reducing properties, but sucrose does not
Which of the following statements is INCORRECT?
(A) Lithium aluminium hydride reduces methyl cyanide to methylamine
(B) Tertiary amines cannot be acetylated
(C) Primary amines react with three moles of alkyl halide to form tetraalkylammonium Salts
(D) Azo compounds are vivid in color and used as dyes
Option a – Lithium aluminium hydride reduces methyl cyanide to methylamine
Based on the sources and deficiency symptoms, identify the vitamin: Sources include carrots, tomatoes, milk, sweet potatoes. Deficiency leads to dry skin, hair, and eye disorders like xerophthalmia
(A) Vitamin C
(B) Vitamin E
(C) Vitamin B₁
(D) Vitamin A
Option d – Vitamin A
Which group includes only thermosetting plastics?
(A) Polyester, SBR, polythene
(B) Bakelite, melamine, urea-formaldehyde resin
(C) Dextron, glyptal, polystyrene
(D) Polythene, polystyrene, PAN
Option b – Bakelite, melamine, urea-formaldehyde resin
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