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You Are On Question Answer Bank SET 2225
111251. Which chemical reaction takes place in a torch cell?
Answer: Chemical energy is converted into electrical energy.
111252. The negative electrode is called?
Answer: Cathode
111253. Substances; that do not conduct electricity are called?
Answer: Insulators
111254. Electrode that is connected to the positive pole of the battery is called?
Answer: Anode
111255. DefineIsotopes?
Answer: Atoms of the same element having same atomic number but different mass number.
111256. Define Isobars?
Answer: Atoms of different elements which have the same mass number but different atomic number.
111257. Define Isotones?
Answer: Atoms of different elements which contain the same number of neutrons.
111258. In a torch cell; which energy is converted into electric energy?
Answer: Chemical
111259. What is isomerism?
Answer: Same molecular formula but different structural formula
111260. What material is used for cutting glass?
Answer: Diamond
111261. Sulphur is required in plants as a nutrient element for?
Answer: Making vitamins
111262. Proteins are mainly made up of?
Answer: Carbon; Hydrogen; Oxygen and Nitrogen
111263. Amino acids are the building blocks of?
Answer: Proteins
111264. Natural rubber is a polymer of?
Answer: Isoprene
111265. Car tyre cords are made up of?
Answer: nylon - 66
111266. The drugs used to treat allergy are called?
Answer: Antihistamins
111267. Substances which prevent the formation of acids in the stomach are called?
Answer: Antacids
111268. 6 to 10% solution of acetic acid is used as a preservative for various food items. It is commonly known as?
Answer: Vinegar
111269. Natural antioxidants are?
Answer: Vitamin C and E
111270. The hardness of water is due to the presence of which salts?
Answer: calcium and magnesium salts
111271. Temporary hardness of water is due to the presence of which salts?
Answer: Bicarbonates of Calcium & Magnesium
111272. Permanent hardness of water is due to the presence of which salts?
Answer: Chlorides and sulphates of Calcium & Magnesium
111273. The most commonly used food preservative is?
Answer: Sodium benzoate
111274. Aspirin is used as?
Answer: an analgesic
111275. Paracetamol is used as?
Answer: both analgesic and antipyretic
111276. The drug used against AIDS is?
Answer: AZT
111277. Which metal is used to make CD?
Answer: Aluminium
111278. The smallest particle of an element or a compound; which shows all the properties of that substance is known as?
Answer: molecule
111279. Non - stick kitchen wares are coated with?
Answer: Teflon
111280. LPG is a mixture of?
Answer: Ethane; Propane and Butane
111281. The main component of LPG is?
Answer: Butane
111282. The main component of natural gas is?
Answer: Methane
111283. The process of coating Iron with Zinc is known as?
Answer: Galvanisation
111284. Soaps solution is basically?
Answer: Alkaline (are the salts of weak acid and strong base. Hence their solution is alkaline)
111285. Detergents are basically-Alkaline/Acidic/Neutral?
Answer: Neutral (Detergents are the salts of strong acid and strong base. Hence their solution will be neutral)
111286. Which acid is known as the “King of Chemicals”?
Answer: Sulphuric acid
111287. The substances which prevent ageing of food materials are commonly known as?
Answer: Anti oxidants
111288. A mixture of carbon monoxide and nitrogen is called?
Answer: producer gas
111289. “King of Chemicals”?
Answer: Sulphuric acid
111290. A mixture of carbon monoxide and hydrogen is called?
Answer: Water gas
111291. A solution of carbon dioxide gas in water is called?
Answer: Soda water
111292. Which gases are used for gas welding?
Answer: Oxygen and acetylene
111293. Rock cotton is?
Answer: Asbestos
111294. Element extracted from monozite sand is?
Answer: Thorium
111295. The gas used in refrigerators and ice plants?
Answer: Ammonia (NH3)
111296. The mixture of uranium oxides is commonly known as?
Answer: Yellow cake
111297. Man made elements are commonly known as?
Answer: Transuranics
111298. The inorganic elements or compounds which occur naturally in the earth’s crust are known as?
Answer: minerals
111299. The mineral from which a metal can be profitably extracted are called?
Answer: Ores
111300. The process of extraction of metals from their ores; and then refining them for use is known as?
Answer: metallurgy
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