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Q226. Lac is a_
- Anatural allotrope
- Bnatural polymers
- Csynthetic polymer
- Dnone of these
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Answer: B) natural polymers
Q227. 'Artificial silk' is also known as ______.
- ARayon
- BDeacon
- Cfibre glass
- DNylon
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Answer: B) Deacon
Q228. The first artificial fibre made by man was-
- ARayon
- BNylon
- Cpolyester
- DTerrycot
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Answer: B) Nylon
Q229. What is the polymer obtained by the condensation of hexamethylene diamine and adipic acid?
- ATollens
- BBakelite
- CNylon - 66
- DTerylene
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Answer: C) Nylon - 66
Q230. Nylon is a_
- Avinyl polymer
- BPodiamide
- Cpolyester
- Dpolysaccharides
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Answer: B) Podiamide
Q231. Who discovered the process of making it through vulcanization?
- AJohn Dunlop
- BCharles Goodyear
- CMacmillan
- DNewton
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Answer: B) Charles Goodyear
Q232. Which method is used for vulcanization of natural rubber?
- Aheating with sulfur
- BHeating with carbon black
- Cadding chlorine gas
- DAddition of diphenylamine
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Answer: A) heating with sulfur
Q233. Which of the following is a sweet smelling substance?
- Aammonia
- Bmethanol
- CEsters
- DEthanol
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Answer: C) Esters
Q234. Which of the following has a very fast fruit ripening rate?
- Amethanol
- BEthyl Acetate
- Cmethyl chloride
- DMayanoic end
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Answer: B) Ethyl Acetate
Q235. Carbohydrates are its compounds_
- Acarbon and hydrogen
- Bcarbon, oxygen and hydrogen
- Ccarbon, nitrogen and hydrogen
- Dcarbon and nitrogen
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Answer: B) carbon, oxygen and hydrogen
Q236. Which one of the following is not an explosive?
- Anitrochloroform
- BT.N.G.
- CT.N.T.
- Dpotassium chlorate
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Answer: A) nitrochloroform
Q237. Which of the following explosives is named 'Nobel Oil'?
- AT.N.G.
- BT.N.P.
- CT.N.A.
- DT.N.T.
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Answer: A) T.N.G.
Q238. The medicinal importance of Tulsi plant is due to the presence of the following:
- Ainorganic acid
- Borganic acids
- CPhenols and Flavonoids
- DNone of these
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Answer: C) Phenols and Flavonoids
Q239. Which of the following is not a natural polymer?
- AWool
- Bleather
- CNylon
- Dsilk
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Answer: C) Nylon
Q240. Which of the following medicines is used to treat indigestion?
- Aantibiotics
- Banalgesic
- Cacid
- Dresistant
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Answer: C) acid
Q241. The compound used as an analgesic in medicine is ____
- AUrotropin
- Bchloroform
- Caspirin
- Dethyl alcohol
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Answer: C) aspirin
Q242. Which of the following polymers cannot be biodegraded?
- ACellulose
- Bstarch
- CProtein
- DPVC
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Answer: D) PVC
Q243. Which of the following is a by-product of soap?
- AIsoprene
- Bethylene glycol
- Cbutane
- DGlycerin
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Answer: D) Glycerin