a. Chloroxylenol and Bithionol b. Chloroxylenol and Terpineol c. Phenol and lodine d. Terpineol and Bithionol Ans. b (7)
a. Methyl salicylic acid b. Acetyl salicylic acid c. Acetyl salicylate d. Methyl salicylate Ans. b (10)
NaNO 2 in dilute HCI followed by addition to an alkaline solution of β – naphthol is Ans. c (4)
a. Methyl orange b. Methyl red c. Phenolphthalein d. All of these Ans. a (13)
a. Dechlormethane solution of β – naphthol b. Acidic solution of β – napthol c. Neutral solution of β – napthol d. Alkalin solution of β – napthol Ans. d (12)
p – hpdrozxy azo benzene β – napthyl azo benzene p – amino azo benzene p – N, N dimethyl amino azo benzene Ans. b (10)
a. Benzaldehyde and dimethyl aniline b. Carbonyl chloride and dimethyl aniline c. Benzene diazonium chloride with dimethyl aniline d. None of the above Ans. d (8)
a. – N = N – b. – NO c. -NO 2 d. -NH 2 Ans. d (11)
a. Cotton dyeing b. Printing c. Painting d. Chromium lakes for wood dyeing Ans. c (8)
a. Martius yellow b. Alizarin c. Phenolphthalein d. Orange I Ans. b (6)
a. Indigo was extracted in India from plants of the Indigo ferra group b. The chemical structure of Indigo was determined by Baeyer, a German chemist who also synthesized it c. Indigo is a dark blue solid soluble in water …
a. Phthalic anhydride and phenol b. Phthalic anhydride and resorcinol c. Succinic acid and resorcinol d. Phthalic anhyride and catechol Ans. b (8)
a. Copper nitrate b. Gold chloride c. Silver nitrate d. Copper sulphate Ans. c (13)
a. Vat dyes b. Disperse dyes c. Triphenyl methane dye d. Azo dyes Ans. a (14)
a. Orange – I b. Phenolphthalein c. Malachite green d. Methylene blue Ans. a (9)
a. Methyl red b. Congo red c. Malachite green d. Methyle orange Ans. c (6)
a. Alizarin b. Basic acid c. Methylene blue d. Phenolphthaein Ans. a (11)
a. Ionic solids b. Molecular solids c. Amorphous solids d. Liquids Ans. a Explanation : Point defect arises because of movement/ deficiency/ excess of ions. (7)
a. AgBr b. AgCl c. KBr d. ZnS Ans. c Explanation : KBr exhibits Schottky defect and not Frenkl defect. (6)
a. Metal excess defect b. Metal deficiency defect c. Displacement defect d. Impurity defect Ans. b Explanation : Metal deficiency occurs when metals show variable valency (9)
a. 2 b. 1 c. 3 d. 5 Ans. d (4)
a. Disloction defect b. Schottky defect c. Frenkel defect d. Electronic defect Ans. d Explanation : When electron rich or electron deficient impurity is added to a perfect crystal it introduces electronic defect in them. (10)
a. p-type semiconductor b. n-type semiconductor c. Intrinsic semiconductor d. Insulator Ans. b (23)
a. Metallic conductor b. Insulator c. n- type semiconductor d. p-type semiconductor Ans. c Explanation : Excess of one valence electron in p atom over Si will form n-type semiconductor (7)
a. Frenkel defect b. Schottky defect c. Non-stoichiometric defect d. Simple intertitial defect Ans. a Explanation : Frankel defect is also known as dislocation defect because in Frankel defect atoms present in crystal lattice is dislocated to interstitial site. (6)
a. Frenkel defect b. Schottky defect c. Metal deficiency defect d. Metal excess defect Ans. d Explanation : In metal excess defect when holes created by missing of anions are occupied by electrons, there sites are called F- centres and …
a. Brass is an interstitial alloy, while steel is a substitutional alloy, while steel is a substitutinal b. Brass is a substitutional alloy, while steel is an interstitital alloy c. Brass and steel are both substitutional alloys d. Brass and …
Ag+ << Br– . The AgBr crystal should have the following characteristics a. Defectless (perfect) crystal b. Schottky defect only c. Frenkel defect only d. Both Schottky and Frenkel defects Ans. d Explanation : In AgBr both Schottky and Frenkel …
a. Softer b. less tensile c. less malleable d. more ductile Ans. b Explanation : On adding non-metal the metal become less tensile (4)
a. Establishing thermal equilibrium b. Having tendency to diffuse c. Contributing to scattering d. Introducing new electronic energy levels Ans. a Explanation : Impurity present in a crystal does not establish thermal equilibrium (17)
a. NaCl b. KCl c. CsCl d. All of these Ans. d Explanation : Schottky defects occurs in highly ionic compounds which have high co-ordination number ex. NcCl, KCl, CsCl. (9)
a. Frenkel defect b. Metal excess defect c. Metal deficiency generally defect d. Schottky defect Ans. b (9)
a. Positive ions and negative ions are of different size b. Positive ions and negative ions are of same size c. Positive ions are small and negative ions are big d. Positive ions are big and negative ions are small …
Poly – β – hydroxybutyrate – co – β hydroxyvalerate is (PHBV) is a copolymer of a. 3 – hydroxbutanoic and 2 – hydroxypentanoic acid b. 3 – hydroxbutanoic and 4 – hydroxypentanoic acid c. 2 – hydroxbutanoic and 3 …
a. If both assertion and reason are true and the reason is the correct explanation of the assertion. b. If both assertion and reason are true but reson is not the correct explanation of the assertion. c. if assertion is …
a. Buna- s b. Nylon-6, 6 c. Nylon 2-nylon 6 d. Nylon- 6 Ans. c (13)