OBJECTIVE QUESTIONS FOR NEET AIIMS JIPMER www.wisedane.com
CHEMISTRY IN EVERYDAY LIFE SET 2 MCQ’S www.wisedane.com
Q1. The local anaesthetic, which is used for small surgical operation is Ether Nitrous oxide Cyclopropane Procaine www.wisedane.com
ANSWER (D) EXPLANATION Procaine is a local anaesthetic, which affects only a part of the body insensitive to pain or feeling. Ether, nitrous oxide and cyclopropane are general anaesthetics www.wisedane.com
Q2. The drug used as an antidepressant is Luminal Tofranil Mescaline Sulphadiazine www.wisedane.com
ANSWER (A) EXPLANATION Luminal and seconal are used as an antidepressant. www.wisedane.com
Q3. Match the following and choose the correct option. Column I Column II Ranitidine Tranquilliser B. Furacine 2. Antibiotic C. Phenelzine 3. Antihistamine D. Chloramphenicol 4. Antiseptic 3 4 1 2 4 1 2 3 3 1 4 2 4 2 1 3 www.wisedane.com
ANSWER (A) EXPLANATION A3 B4 C 1 D2 www.wisedane.com
Q4. The pH value of gastric juice in human stomach is about 1 Q4. The pH value of gastric juice in human stomach is about 1.8 and in the small intestine it is about 7.8. The pKa value of aspirin is 3.5. Aspirin will be Ionized in the small intestine and almost unionized in the stomach Unionized in the small intestine and in the stomach Completely ionized in the small intestine and in the stomach Ionized in the stomach and almost unionized in the small intestine www.wisedane.com
ANSWER (A) EXPLANATION Aspirin is a moderate acid (pKa=3.5) hence, it is almost unionized in stomach due to its strong acidic medium because of HCl. It is due to common ion effect. While in small intestine, the medium is alkaline, hence aspirin will be sufficiently ionized in small intestine. www.wisedane.com
Q5. Which of the following will not enhance nutritional value of food? Minerals Artificial sweeteners Vitamins Amino acids www.wisedane.com
ANSWER (C) EXPLANATION Vitamins doesn’t enhance nutritional value of food www.wisedane.com
Q6. Among the following sweeteners, which one has the lowest sweetness value? Alitame Aspartame Saccharin Sucralose www.wisedane.com
ANSWER (B) EXPLANATION Aspartame Is 100 times sweeter than sugar (used only in cold foods and soft drinks). Saccharin is 550 times sweeter than sugar Sucralose is 600 times sweeter than sugar Alitame is 2000 times sweeter than sugar (the latter three are used for cooking and baking). www.wisedane.com
Q7. Sucralose, an artificial sweetener’ is Monochloro derivative of sucrose Dichloro derivative of sucrose Trichloro derivative of sucrose None of these above www.wisedane.com
ANSWER (C) EXPLANATION Trichloro derivative of sucrose www.wisedane.com
Q8. Which of the following is used as food preservative? Sodium benzoate Potassium chloride Sodium bicarbonate Both (b) and (c) www.wisedane.com
ANSWER (A) EXPLANATION Sodium benzoate www.wisedane.com
Q9. Which of the following statement is not correct? Some antiseptics can be added to soaps Dilute solutions of some disinfectants can be used as an antiseptic Disinfectants are antimicrobial drugs Antiseptic medicines can be ingested www.wisedane.com
ANSWER (D) EXPLANATION Antiseptic medicines are for local use www.wisedane.com
Q10. Compound which is added to a soap to impart antiseptic properties is Sodium lauryl sulphate Sodium dodecyl benzene sulphonate Rosin Bithional www.wisedane.com
ANSWER (D) EXPLANATION Bithional is an antiseptic, which is mixed with soap to impart antiseptic property, Soap thus prepared is known as medicated soap. www.wisedane.com
Q11. Which of the following is known as invert soap? Pentaerythritol monostearate Sodium strearyl ammonium bromide Sodium stearyl sulphate Ethoxylated nonyphenol www.wisedane.com
ANSWER (B) EXPLANATION Trimethyl stearyl ammonium bromide is known as invert soap. invert soap - a class of synthetic detergents in which the surface-active part of the molecule is the cation. cationic detergent. www.wisedane.com
Q12. Which of the following represents soap? C17H35COOH C17H35COOK C15H31COOH C17H35(COO)2 Ca www.wisedane.com
ANSWER (B) EXPLANATION Soaps are the sodium or potassium salts of higher fatty acids. E.g. C17H35COOK (potassium strearate). These are obtained by alkaline hydrolysis of oils and fats (saponification). www.wisedane.com
Q13. Which of the following is not true for a detergent molecule? It has a non-polar organic part and a polar group It is not easily biodegraded It is sodium salt of a fatty acid It is a surface active reagent www.wisedane.com
ANSWER (C) EXPLANATION Soap is a sodium or potassium salt of fatty Acids while detergent is asodium salt of benzene sulphonic acid derivatives. www.wisedane.com
Q14. Detergents are prepared by the action of H2SO4 followed by neutralisation by starting with Cholesterol Cyclohexanol Lauryl alcohol p – nitrophenol www.wisedane.com
ANSWER (C) EXPLANATION Detergents are prepared by sulphonation of lauryl alcohol followed by neutralization www.wisedane.com
Q15. Structurally, biodegradable detergents should contain Highly branched alkyl chain Normal alkyl chain or less branched alkyl chain Cyclopentyl side chain Benzyl side chain www.wisedane.com
ANSWER (B) EXPLANATION The detergents having unbranched alkyl chains or alkyl chain with minimum branching can biodegraded more easily by bacteria. www.wisedane.com
Q16. Soaps are classified as Esters Ethers Carbohydrates Sodium salts of fatty acids www.wisedane.com
ANSWER (D) EXPLANATION Soaps are sodium salts of fatty acids. These are formed by heating fat (i.e. glyceryl ester of fatty acid) with aqueous sodium hydroxide solution (saponification). www.wisedane.com
Q17. Which of the following compounds is not an antacid? Aluminium hydroxide Climetidine Phenelzine Ranitidine www.wisedane.com
ANSWER (C) EXPLANATION www.wisedane.com
Q18. H1-receptor antagonists is a term associated with Antiseptics Antihistamines Antacids Analgesics www.wisedane.com
ANSWER (B) EXPLANATION The term antihistamine refers only to compounds not have inhibits action at the H1-receptor so, the term H1-receptor antagonists is related with antihistamines. www.wisedane.com
Q19. Which of the following statement about aspirin is not true? It is effective in relieving pain It is aneurologically active drug It has antiblood clotting action It belong to narcotic analgesics www.wisedane.com
ANSWER (D) EXPLANATION Aspirin is a non- narcotic ( non –habit forming) analgesic, i.e.give relif from pain and also it have antiblood clotting action. It is a neurologically active drug. www.wisedane.com
Q20. Aspirin is known as Acetyl salicylic acid Phenyl salicylate Acetyl salicylate Methyl salicylic acid www.wisedane.com
ANSWER (A) EXPLANATION Aspirin is acetyl derivative of salicylic acid. www.wisedane.com
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