561. Identify the thermosetting plastic from the given options: A. Polythene B. Bakelite C. PVC D. Casseine ✅ The correct answer is option B.
562. Rayon is an example of _______? A. a synthetic fiber B. a natural fiber C. semi-synthetic fiber D. Synthetic Detergent ✅ The correct answer is option C.
563. Which among the following oxides cause the Acid rain ? A. Carbon monoxide and carbon dioxide B. Nitrous oxide and sulphur dioxide C. Carbon dioxide and nitrous oxide D. Sulphur dioxide and carbon monoxide ✅ The correct answer is option B.
564. Which among the following happens in an oxidation reaction ? A. Electrons are gained B. Electrons are lost C. Protons are gained D. Protons are lost ✅ The correct answer is option B.
565. Which among the following sentences is true? A. Ammophos is an organic fertilizer while Urea is an inorganic fertilizer B. Ammophos is an inorganic fertilizer while Urea is an organic fertilizer C. Both of them are organic fertilizers D. Both of them are inorganic fertilizers ✅ The correct answer is option B.
566. Who among the following had given the Atomic Theory? A. Benzamin Franklin B. Madam curie C. Albert Einstien D. John Dalton ✅ The correct answer is option D.
567. Which among the following is the correct decreasing of bioelements in Human Body? A. oxygen, hydrogen, Carbon, nitrogen, calcium, and phosphorus B. oxygen, carbon, nitrogen, hydrogen, calcium, and phosphorus C. oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus D. carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus ✅ The correct answer is option C.
568. Which among the following is correct full form of DDT? A. Dichloro-diethyl-trifluoromethane B. Dichloro-diphenyl-trichloroethane C. Dichloro-diphenyl-trichloromethane D. Dipheneyl-dichloro-trichloromethane ✅ The correct answer is option B.
569. Who among the following scientists had discovered Radium? A. Marie Sklodowska-Curie and Pierre Curie B. André-Louis Debierne C. Kasimir Fajans D. Oswald Helmuth Göhring ✅ The correct answer is option A.
570. The aqueous solution of which among the following acids is called Vinegar? A. Oxalic acid B. Citric acid C. Acetic acid D. Hydrochloric acid ✅ The correct answer is option C.