Description : A common disinfectant used in village wells for disinfection of water is (A) Free chlorine (B) Bromine (C) Iodine (D) Potassium permanganate
Last Answer : Option D
Description : The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant? (A) Chlorine (B) Alkalis (C) Benzene hexachloride (D) Alkyl benzene sulphonate (ABS)
Last Answer : (A) Chlorine
Description : Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of (A) Ozone and iodine (B) Chlorine or its compounds (C) Ultraviolet light for irradiation of water (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Which halogen does not appreciably react with methane in a free-radical substitution reaction? (a) chlorine (b) bromine (c) iodine (d) fluorine
Last Answer : iodine
Description : Sea weeds are an important source of (A) Fluorine (B) Chlorine (C) Bromine (D) Iodine
Last Answer : (D) Iodine
Description : What is the same about fluorine chlorine bromine and iodine?
Last Answer : They have many similarities, which is why we put them all into the same Periodic Table group. Here is a brief list:They are diatomic.They are coloured.They are oxidising agents.They react with hydrogen.They react with metals.
Description : What Element Would Be Least Reactive Out Of Chlorine Iodine Bromine And Fluorine?
Last Answer : Feel Free to Answer
Description : Which one of the following elements is associated with teeth disorder? (1) Chlorine (2) Fluorine (3) Bromine (4) Iodine
Last Answer : (2) Fluorine Explanation: Fluorine is the element that is associated with teeth disorder because the presence of sodium fluoride in drinking water at the level of 2 ppm may cause mottled enamel ... , topically applied fluoride (toothpaste, dental rinses) has been shown to help reduce dental caries.
Description : Seaweeds are important source of – (1) fluorine (2) chlorine (3) bromine (4) iodine
Last Answer : (4) iodine Explanation: Seaweed is a source of iodine, necessary for thyroid function and to prevent goitre. However, an excess of iodine is suspected in the heightened cancer risk in Japanese who consume a lot of the plant.
Description : The most reactive among the halogens is (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine
Last Answer : (1) Fluorine Explanation: Fluorine is one of the most reactive elements in existence, attacking otherwise inert materials such as glass, and forming compounds with the heavier noble gases. It is a ... react with glass in the presence of small amounts of water to form silicon tetrafluoride (SiF4).
Description : The most reactive among the halogens is - (1) Fluorine (2) Chlorine (3) Bromine (4) Iodine
Last Answer : (1) Fluorine Explanation: As a general rule, fluorine is the most reactive halogen and astatine is the least reactive. All halogens form Group 1 salts with similar properties.
Description : Sea weeds are important source of – (1) iron (2) chlorine (3) bromine (4) iodine
Last Answer : (4) iodine Explanation: Seaweed is a source of iodine, necessaly for thyroid function and to prevent goitre. However, an excess of iodine is suspected in the heightened cancer risk in Japanese who consume a lot of the plant, and even bigger risks in post-mempausal women.
Description : Bleaching powder contains------? A. Nitrogen B. Iodine C. Chlorine (Answer) D. Bromine
Last Answer : C. Chlorine (Answer)
Description : Which of the following has the smallest atomic radius? w) iodine x) chlorine y) fluorine z) bromine
Last Answer : ANSWER: Y -- FLUORINE
Description : The molar volume of which two elements is the same at standard temperature and pressure? w) fluorine and bromine x) fluorine and iodine y) fluorine and chlorine z) bromine and iodine
Last Answer : ANSWER: Y -- FLUORINE AND CHLORINE
Description : Which of the following halogens does NOT replace the other halogens from their compounds? w) fluorine x) iodine y) bromine z) chlorine
Last Answer : ANSWER: X -- IODINE
Description : Which one of the following elements is associated with teeth disorder ? (1) Chlorine (2) Fluorine (3) Bromine (4) Iodine
Last Answer : Fluorine
Description : Seaweeds are important source of (1) fluorine (2) chlorine (3) bromine (4) iodine
Description : Sea weeds are important source of (1) iron (2) chlorine (3) bromine (4) iodine
Description : Which of the following is very reactive and kept in kerosene? (1) Sodium (2) Potassium (3) Iodine (4) Bromine
Last Answer : (1) Sodium Explanation: Sodium is a very reactive metal. It reacts vigorously with oxygen and water. A lot of heat is generated in this process. Therefore, it is stored in kerosene to avoid contacts between either atmospheric oxygen or water.
Last Answer : Sodium
Description : 1-Butyne can be distinguished from 2-butyne by using (a) potassium permanganate (b) bromine in CCl4 (c) Tollens' reagent (d) chlorine in CCl4
Last Answer : chlorine in CCl4
Description : The amount of Chlorine available in water after disinfection is called as – (1) free chlorine (2) residual chlorine (3) free available chlorine (4) combined available chlorine
Last Answer : (2) residual chlorine Explanation: The word "residual" means "remainder" or "that which is left", and as the name suggests the chlorine residual is measure of the amount of chlorine ... system. Tests for chlorine residual are probably the most frequently performed tests at water treatment plants.
Description : The amount of chlorine available in water after disinfection is called as (1) free chlorine (2) residual chlorine (3) free available chlorine (4) combined available chlorine
Last Answer : residual chlorine
Description : Iodised salts contains the iodine salts of which metal? A. Iodine B. Potassium (Answer) C. Sodium Chloride D. Chlorine
Last Answer : B. Potassium (Answer)
Description : Which of the following is the most widely used disinfectant in water treatment? (A) Chlorine (B) Irradiation of water by ultraviolet light (C) Cation exchanger (D) Coagulation
Description : Dose of chlorine for disinfection of water is about __________ mg/litre of water. (A) 0.01 (B) 0.1 (C) 0.3 (D) 1
Last Answer : (D) 1
Description : A gas used as a disinfectant in drinking water is - (1) Hydrogen (2) Oxygen (3) Fluorine (4) Chlorine
Last Answer : (4) Chlorine Explanation: Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water.
Description : The most ideal disinfectant used for drinking water throughout the world, is (A) Alum (B) Lime (C) Chlorine (D) Nitrogen
Last Answer : (C) Chlorine
Description : Disinfection of water with ozone is not good because (A) It vanishes before water reaches the consumers (B) It removes the colour, taste and odour from water as bacterias (C) It adds taste to the water (D) It is more efficient than chlorine in killing bacterias
Last Answer : (D) It is more efficient than chlorine in killing bacterias
Description : Which of the following chemicals are halogens used for disinfection? a. Phenol b. Alcohol c. Detergent d. Chlorine
Last Answer : d. Chlorine
Description : A dark purple compound used as an antiseptic and disinfectant is (a) Potassium nitrate (b) Sodium thiosulphate (c) Potassium permanganate (d) Calcium phosphate
Last Answer : Ans:(c)
Description : Brown spots in fabrics will be caused by washing with water containing large amount of: (A) Iron (B) Zinc (C) Iodine (D) Bromine
Last Answer : (A) Iron
Description : Out of the following, copper vessels are the most suitable for the storage of (A) Bromine (B) Dry chlorine & dry fluorine (C) Nitric acid (95% and fuming) (D) Phosphoric acid (95%) & sulphuric acid (95% and fuming)
Last Answer : (B) Dry chlorine & dry fluorine
Description : Bleaching of paper pulp is done with (A) Activated clay (B) Bromine (C) Chlorine or chlorine dioxide (D) Magnesium sulphite
Last Answer : (C) Chlorine or chlorine dioxide
Description : Which of the following is not produced on commercial scale from sea water? (A) Bromine (B) Magnesium compounds (C) Potassium compounds (D) Sodium sulphate
Last Answer : (D) Sodium sulphate
Description : Which of the following is used to iodise common salt? (1) Potassium iodide (2) Iodine (3) Potassium iodate (4) Sodium iodide
Last Answer : (3) Potassium iodate Explanation: Iodized salt (also spelled iodised salt) is table salt mixed with a minute amount of various salts of the element iodine. Table salt with iodide salt slowly loses its ... salt can be iodised by spraying it with a potassium iodate solution. 60 ml of potassium iodate.
Description : Which of the following is used to iodise common salf ? (1) Potassium iodide (2) Iodine (3) Potassium iodate (4) Sodium iodide
Last Answer : Potassium iodate
Description : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What order of oxidising ability of halo
Last Answer : concentrated sulphuric acid on reaction with NaCl, NaBr and Nal produces HCl, bromine and iodine respectively. What ... gt l_(2) gt H_(2)SO_(4)`
Description : `S_(1):(HPO_(3))_(n)` can be prepared by heating phosphorous acid and bromine in a sealed tube. `S_(2)` : dry iodine reacts with ozone and formed yell
Last Answer : `S_(1):(HPO_(3))_(n)` can be prepared by heating phosphorous acid and bromine in a sealed tube. `S_(2)` : ... below 369 K. A. FTF B. TTF C. TTT D. TFF
Description : What is the only nonmetal element that is a liquid room temperature? w) phosphorus x) bromine y) iodine z) arsenic
Last Answer : ANSWER: X -- BROMINE
Description : For water purification, we use _____. A. Chlorine B. Flourine C. Bromine D. Lodine
Last Answer : ANSWER: A
Description : For water purification, we use? A. Chlorine (Answer) B. Bromine C. Plants D. Young man
Last Answer : A. Chlorine (Answer)
Description : The sprayers are cleaned before use by— (A) 1% chlorine water (B) 1% hydrochloric acid (C) 1% ammonia water (D) 1% bromine water
Last Answer : (B) 1% hydrochloric acid
Description : What is aluminum bromide plus chlorine yields aluminum chloride and bromine?
Last Answer : The chemical equation is:2 AlBr3 + 3 Cl2 = 2 AlCl3 + 3 Br2
Description : How many valence electrons are in the element fluorine and do the same for chlorine and bromine?
Last Answer : The number of valence electrons is seven.