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JEE Main Mock Test Series 2020 & Previous Year Papers

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Question 1: Which one of the following is the correct statement regarding the particular psychotropic drug specified?
(a) Barbiturates cause relation and temporary euphoria
(b) Hashish causes after thought perceptions and hallucinations
(c) Opium stimulates nervous system and causes hallucinations
(d) Morphine leads to delusions and disturbed emotions
Answer: b
Solution: Morphine is both a sedative as well as analgesic drug. Barbiturates are sedatives and have hypnotic effect. Opium is also a narcotic drug which has a depressing effect on CNS.

Question 2: Modern detergents contain enzyme preparations of
(a) Thermophiles
(b) Acidophiles
(c) Alkaliphiles
(d) Thermoacidophiles
Answer: b
Solution: Enzymes used in detergents are proteases and lipases, which are obtained from fungi. Fungi grows properly in acidic medium.

Question 3: Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true-
(a) A 0.2 % solution of phenol is an antiseptic while 1 % solution acts as a
disinfectant
(b) Chlorine and Iodine are used as strong disinfectants
(c) Dilute solutions of boric acid and hydrogen peroxide are strong antiseptics
(d) Disinfectants harm the living tissues
Answer: b
Solution: Chlorine is disinfectants as it cannot be applied on living tissues but Iodine is antiseptics.

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