Description : The lime which contains mainly calcium oxide and slacks with water, is known as a) Fat lime b) Quicklime* c) Hydraulic lime d) Poor line
Last Answer : b) Quicklime*
Description : The Most common admixture used to accelerate the initial setting of concrete is a) Gypsum b) Calcium chloride* c) Calcium carbonate d) Calcium bicarbonate
Last Answer : b) Calcium chloride*
Description : Glass is mainly composed of - (1) Sodium silicate (2) Calcium carbonate (3) Calcium hydroxide (4) Sodium bicarbonate
Last Answer : (1) Sodium silicate Explanation: Glass is made from silica (SiO₂) and soda lime, which react to form sodium silicate.
Description : What is "milk of magnesia" chemically? (1) Magnesium carbonate (2) Sodium bicarbonate (3) Calcium hydroxide (4) Magnesium hydroxide
Last Answer : (4) Magnesium hydroxide Explanation: agnesium hydroxide is an inorganic compound with the chemical formula Mg(OH)2. As a suspension in water, it is often called milk of magnesia because of its milk-like appearance. The solid mineral form of magnesium hydroxide is known as brucite.
Description : What is “milk of magnesia” chemically ? (1) Magnesium carbonate (2) Sodium bicarbonate (3) Calcium hydroxide (4) Magnesium hydroxide
Last Answer : Magnesium hydroxide
Description : Write the molecular formulae of: 1. Copper oxide 2. Iron (III) chloride 3. Sodium hydroxide 4. Iron (II) sulphide 5. Lead (II) oxide 6. Hydrogen nitrate (nitric ... Hydrogen sulphate (sulphuric acid) 8. Calcium hydroxide 9. Magnesium carbonate 10.Ammonium carbonate
Last Answer : 1. Copper oxide - CuO 2. Iron (III) chloride - FeCl3 3. Sodium hydroxide - NaOH 4. Iron (II) sulphide - FeS 5. Lead (II) oxide - PbO 6. Hydrogen nitrate (nitric acid) - HNO3 7. ... ) - H2SO4 8. Calcium hydroxide - Ca(OH)2 9. Magnesium carbonate - MgCO3 10.Ammonium carbonate - (NH4)2CO3
Description : Quick lime is (A) Calcium carbonate (B) Calcium oxide (C) Calcium hydroxide (D) None of the above
Last Answer : Answer: Option B
Description : The product obtained on mixing calcium oxide with water is called (A) Quicklime (B) Slaked lime (C) Milk of lime (D) None of these
Last Answer : (B) Slaked lime
Description : Another name for baking soda is : (1) Sodium bicarbonate (2) Sodium carbonate (3) Sodium sulphate (4) Sodium hydroxide
Last Answer : (1) Sodium bicarbonate Explanation: Sodium bicarbonate (NaHCO2)is known as baking soda.
Description : What is the product formed when sodium bicarbonate is heated strongly? (1) Sodium Carbonate (2) Sodium Hydroxide (3) Sodium Peroxide (4) Sodium Monoxide
Last Answer : (1) Sodium Carbonate Explanation: When sodium bicarbonate is strongly heated, it decomposes into sodium carbonate, water vapor, and carbon dioxide. Solid sodium carbonate is a white powder and is used in ... name 'baking powder'; sodium bicarbonate is used in baking under the name 'baking soda'.
Description : Brine is an a) aqueous solution of sodium hydroxide b) aqueous solution of sodium carbonate c) aqueous solution of sodium chloride d) aqueous solution of sodium bicarbonate
Last Answer : c) aqueous solution of sodium chloride
Description : Water may contain (A) Bicarbonate alkalinity (B) Carbonate alkalinity (C) Hydroxide alkalinity (D) All the above
Last Answer : (D) All the above
Last Answer : Sodium Carbonate
Description : Baking soda is : (1) Potassium carbonate (2) Sodium hydroxide (3) Sodium carbonate (4) Sodium bicarbonate
Last Answer : Sodium bicarbonate
Description : Which of the following substances would be the best choice to neutralize aqueous Sodium Hydroxide? w) sodium carbonate x) silicon dioxide y) aluminum oxide z) phosphorus pentoxide
Last Answer : ANSWER: Z -- PHOSPHORUS PENTOXIDE
Description : Which one of the following mixtures is homogeneous? (1) Starch and sugar (2) Methanol and water (3) Graphite and charcoal (4) Calcium carbonate and calcium bicarbonate
Last Answer : (2) Methanol and water Explanation: A homogeneous mixture is a solid, liquid, or gaseous mixture that has the same proportions of its components throughout any given sample.
Description : Washing soda is the common name for (1) Calcium carbonate (2) Calcium bicarbonate (3) Sodium carbonate (4) Sodium bicarbonate
Last Answer : (3) Sodium carbonate
Description : The major calcium salt in bones is (A) Calcium carbonate (B) Calcium chloride (C) Calcium hydroxide (D) Calcium phosphate
Last Answer : Answer : D
Description : Lime water contains (a) sodium hydroxide (b) calcium hydroxide (c) sodium carbonate (d) calcium chloride
Last Answer : Ans:(b)
Description : A metal carbonate X on reacting with an acid gives a gas which when passed through a solution Y gives carbonate back..Identify X and Y. (a) X is sodium carbonate and Y is Sodium hydroxide (b) X ... Y is calcium hydroxide (c ) X is Potassium carbonate and Y is Potassium hydroxide. (d) None of above
Last Answer : (b) X is Calcium carbonate and Y is calcium hydroxide
Description : Calcium carbonate is most soluble in: w) 0.2 Molar Sodium carbonate x) 0.1 Molar Calcium chloride y) 0.1 Molar Sodium hydroxide z) 0.1 Molar Hydrochloric acid
Last Answer : ANSWER: Z -- 0.1 MOLAR HYDROCHLORIC ACID
Description : Some physicians suggest that women supplement their diets with antacids to supply additional amounts of a certain element thought to reduce the risk of osteoporosis. The ingredient in antacids which ... element is: w) calcium carbonate x) aluminum hydroxide y) magnesium hydroxide z) simethicone
Last Answer : ANSWER: W -- CALCIUM CARBONATE
Description : Write balanced chemical equations for the following word equations: (a) Iron + Chlorine → Iron (III) chloride (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water (c) Magnesium + oxygen → ... oxide (d) Calcium oxide + water → Calcium hydroxide (e) Sodium + chlorine → Sodium chloride
Last Answer : (a) Iron + Chlorine → Iron (III) chloride 4Fe + 3Cl2 → 2F2Cl3 (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water 2Mg + 2H2SO4 → 2MgSO4 + 2H2 (c) Magnesium + oxygen → Magnesium oxide 2Mg ... hydroxide CaO + H2O → Ca(OH)2 (e) Sodium + chlorine → Sodium chloride 2Na + Cl2 → 2NaCl
Description : Pick up the correct statement from the following: (A) Slaked lime contains calcium hydroxide (B) Quick lime contains calcium oxide (C) Slaked lime may be obtained from quick lime (D) All the above
Last Answer : Answer: Option D
Description : How would you treat hyperaemia (hyperaemic tooth):** A. Zinc Oxide and eugenol cement B. Calcium hydroxide C. Corticosteroid paste
Last Answer : A. Zinc Oxide and eugenol cement
Description : A 10 years-old boy presents with a non-vital, non-mobile tooth. Treatment is: A. Pulpectomy with calcium hydroxide B. Pulpectomy with Zinc oxide eugenol C. Pulpotomy with formocresol D. No treatment is required if tooth is asymptomatic
Last Answer : A. Pulpectomy with calcium hydroxide
Description : Caries which is close to the pulp chamber; on x rays you find ‘dens in dente’; the right treatment is: A. Zinc oxide eugenol cement and amalgam B. Pulpectomy C. Pulpotomy D. Calcium hydroxide on pulp and amalgam
Last Answer : B. Pulpectomy
Description : Calcium carbonate decomposes into calcium oxide & carbon dioxide Her results:Mass of calcium carbonate before heating = 2.00 g Mass of calcium oxide left after heating = 1.12 g work out the mass of carbon dioxide released during the decomposition?
Last Answer : I am not sure of the answer so can someone help me pls
Description : Lime water turns milky when carbon dioxide is passed through it. It is due to the for mation of: (1) Calcium Carbonate (2) Barium Carbonate (3) Calcium Hydrogen Carbonate (4) Calcium Oxide
Last Answer : (1) Calcium Carbonate Explanation: When carbon dioxide is passed through lime water for a short time, it turns lime water milky due to formation of a white precipitate of calcium carbonate.
Description : Tooth enamel is made up of: a) Potassium b) Calcium carbonate c) Calcium phosphate d) Calcium oxide
Last Answer : c) Calcium phosphate
Description : __________ is the major constituent of the Portland cement. (A) Calcium carbonate (B) Calcium oxide (C) Tricalcium silicate (D) Calcium sulphate
Last Answer : (C) Tricalcium silicate
Description : Which of the following is the primary reason for adding calcium carbonate to the reduction process of iron oxide ores ? The calcium carbonate: w) acts as an oxidizing agent x) removes silicate waste products y) acts as a reducing agent z) removes sulfur waste products
Last Answer : ANSWER: X -- REMOVES SILICATE WASTE PRODUCTS
Description : Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous
Last Answer : (i) Aluminium oxide (slag). *
Description : Soundness test of cement is done to determine its a) Durability in seawater b) Free lime content* c) Iron oxide content d) Alumina content
Last Answer : b) Free lime content*
Description : Putty is made up of a) White lead and turpentine b) Powdered chalk and raw linseed oil* c) Red lead and linseed oil d) Zinc oxide and boiled linseed oil
Last Answer : b) Powdered chalk and raw linseed oil*
Description : Which one of the following impurity is not desirable in the soil used for brick formation a) Alkali b) Kankar c) Iron oxide d) Alkali & Kankar*
Last Answer : d) Alkali & Kankar*
Description : aint Red Oxide confirms to IS
Last Answer : 123
Description : Paint Zinc chromate Red oxide primer confirms to IS
Last Answer : 2074
Description : Shelf life of Paint Red Oxide Ready mixed (IS : 123) a) 4 month b) 1 year* c) 6 month d) None of the above
Last Answer : b) 1 year*
Description : While painting with red oxide paint, a little quantity of ………..shall be added to the paint while doing the first coat to distinguish it from the second coat a) little blue paint b) lamp black* c) red paint d) green paint
Last Answer : b) lamp black*
Description : In areas where there is severe corrosion Finishing coat will be a) Two coats of aluminium paint to IS : 2339* b) One coat of zinc chromate priming to IS : 104 e) Two cover coats of red oxide paint to IS :123 f) One coat of zinc chrome - red oxide priming to IS : 2074
Last Answer : a) Two coats of aluminium paint to IS : 2339*
Description : In areas where there is no severe corrosion Finishing coat will be a) Two coats of aluminium paint to IS : 2339 b) One coat of zinc chromate priming to IS : 104 c) Two cover coats of red oxide paint to IS :123* d) One coat of zinc chrome - red oxide priming to IS : 2074
Last Answer : c) Two cover coats of red oxide paint to IS :123*
Description : Which one of the following is used as a food preservative? (1) Sodium benzoate (2) Sodium thiosulphate (3) Sodium hydroxide (4) Sodium bicarbonate
Last Answer : (1) Sodium. benzoate Explanation: Sodium benzoate has the chemical formula. NaC6H5CO2, it is a widely used food preservative, with E number E211. It is the sodium salt of benzoic acid and exists in this form when dissolved in water. It can be produced by reacting sodium hydroxide with benzoic acid.
Description : Why are cimetidine or ranitidine better antacids than sodium bicarbonate or magnesium or aluminium hydroxide ?
Last Answer : Ans. If excess of NaHCO3 or Mg (OH)2 or Al (OH)3 is used, it makes the stomach alkaline and thus triggers the release of even more HCl. In contrast, cimetidine or ranitidine prevent the interaction of histamine with the receptor cells in the stomach wall and thus release lesser amount of HCl.
Description : Which one of the following is used as a food preservative ? (1) Sodium benzoate (2) Sodium thiosulphate (3) Sodium hydroxide (4) Sodium bicarbonate
Last Answer : Sodium benzoate
Description : Is sodium carbonate Na2CO3 and bicarbonate NaHCO3 one of the primary standard substances?
Last Answer : Why are you asking us these questions?
Description : What are the differences between carbonate and bicarbonate?
Last Answer : Carbonate is the CO₃²⻠ion; bicarbonate is the HCO₃⻠ion, also called the “hydrogen carbonate†ion. Thus sodium carbonate is Na₂CO₃ and sodium bicarbonate is NaHCO₃.
Description : Washing soda is - (1) sodium sulphite (2) sodium bicarbonate (3) sodiun carbonate (4) sodium biosulphite
Last Answer : (3) sodiun carbonate Explanation: Sodium carbonate (also known as washing soda, soda ash and soda crystals, and in the monohydrate form as crystal carbonate), Na2CO3, is the water-soluble sodium salt of carbonic acid.
Description : The chemical name of baking soda is - (1) Sodium carbonate (2) Sodium bicarbonate (3) Sodium chloride (4) Sodium nitrate
Last Answer : (2) Sodium bicarbonate Explanation: Sodium bicarbonate (NaHCO3) is also known as baking soda. It is a chemical leavening agent which is added to baked goods before cooking to produce carbon dioxide and cause them to 'rise'.
Description : What is the chemical name for `Baking Soda'? (1) Sodium carbonate (2) Sodium bicarbonate (3) Sodium nitrite (4) Sodium nitrate
Last Answer : (2) Sodium bicarbonate Explanation: Sodium bicarbonate or sodium hydrogen carbonate is the chemical compound with the formula NaHCO3. Sodium bicarbonate is a white solid that is crystalline but often ... It has a slightly salty, alkaline taste resembling that of washing soda (sodium carbonate).