Description : . Bromides contained in hot mother liquor is treated with __________ during manufacture of bromine from sea water. (A) SO3 (B) Cl2 (C) NH3 (D) SO2
Last Answer : (B) Cl2
Description : Which of the following is a natural inorganic fertiliser? (A) Chile salt petre (B) Oilcake (C) Gobar manure (D) None of these
Last Answer : (A) Chile salt petre
Description : Glauber's salt is chemically represented by (A) Na2SO4 .10H2O (B) CaCl(OCl) (C) CaSO4 .H2O (D) (NH4 )2SO4
Last Answer : (A) Na2SO4 .10H2O
Description : Deacon's method is used for the manufacture of (A) Glauber's salt (B) Common salt (C) Chlorine (D) Graphite electrode
Last Answer : (C) Chlorine
Description : Gun powder, which is an explosive comprises of charcoal, sulphur and (A) Glycerine (B) Salt petre (C) Nitro glycerine (D) Dynamite
Last Answer : (B) Salt petre
Description : Pick out the wrong statement. (A) Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators (B) Gun powder comprises of 75% salt petre, 15% charcoal ... TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being
Last Answer : (D) TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being
Description : Glauber's salt is chemically (A) Calcium sulphate (B) Potassium sulphate (C) Potassium chlorate (D) None of these
Last Answer : (D) None of these
Description : Which one among the following substances evolved heat when dissolved in water? (1) Glucose (2) Fructose (3) Quick lime (4) Salt peter
Last Answer : (3) Quick lime Explanation: Quicklime is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature. When limestone is heated, at about 1000° C it undergoes thermal decomposition.
Description : The major constituent of black liquor generated during paper manufacture is sodium (A) Sulphate (B) Carbonate (C) Hydroxide (D) Bi-carbonate
Last Answer : (B) Carbonate
Description : The main constituent which imparts hydraulicity to hydraulic lime is (A) Calcium oxide (B) Silica (C) Clay (D) Water
Last Answer : Answer: Option C
Description : Pick out the wrong statement. (A) Swenson-Walker crystalliser is a batch crystalliser (B) Super saturation of the solution is the driving potential for a crystal growth (C) The ... a solution is called mother liquor (D) The first stage of crystal formation is called nucleation
Last Answer : (A) Swenson-Walker crystalliser is a batch crystalliser
Description : Identify the wrong statement with reference to immunity. (a) When exposed to antigen (living or dead) antibodies are produced in the host's body. It is called Active immunity . (b) When ... full response. (d) Fetus receives some antibodies from mother, it is an example for passive immunity
Last Answer : c) Active immunity is quick and gives full response.
Description : Which of the following was not a method adopted during the Non Cooperation- Khilafat Movement? a. Surrender of titles awarded by the British b. Boycott of goods, courts and services c. Picketing of Liquor shops d. Breaking of the Salt Law
Last Answer : d. Breaking of the Salt Law
Description : Main constituent of the gas produced from a gobar gas plant is (A) CO2 (B) CH4 (C) H2 (D) CO
Last Answer : (B) CH4
Description : CaO is called (A) Quick lime (B) Slaked lime (C) Limestone (D) Calcite
Last Answer : (A) Quick lime
Description : Rotary kiln is not involved in the production of (A) Cement (B) Lime from limestone (C) Slaked lime from quick lime (D) None of these
Last Answer : (C) Slaked lime from quick lime
Description : Ammonia gas can be dried by (A) PCl5 (B) Quick lime (C) CaCl2 (D) Concentrated H2SO4
Last Answer : (B) Quick lime
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 : The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to (A) Avoid mechanical weakening of fibre (B) Remove lignin by way of crystallisation (C) Increase the cellulose content (D) None of these
Last Answer : (A) Avoid mechanical weakening of fibre
Description : Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following: (A) Alumina (B) Lime (C) Iron-oxide (D) Magnesia
Last Answer : Answer: Option A
Description : Chief constituent of ordinary Portland cement is [ A ] Lime [ B ] Alumina [ C ] Magnesia [ D ] Iron oxide
Last Answer : [ A ] Lime
Description : The liquor which is produced from the malted barley?
Last Answer : Beer
Description : Describe an activity to observe what happens when quick lime is added to water taken in a beaker. State two important observations and name the type of reaction taking place. -Chemistry
Last Answer : Answer. Aim: To observe what happens when quicklime is added to water taken in a beaker. Materials Required:- Quicklime (calcium oxide), water, beaker.Procedure: 1. Take 5 g of calcium oxide in a ... example for each of decomposion reaction carried out with help of (i) Electricity (ii) Heat (iii)
Description : Bleaching powder is prepared by passing – (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne
Last Answer : (1) Chlorine over slaked lime Explanation: Calcium hypochlorite (bleaching powder) is manufactured by the calcium process: 2Cl2 + 2Ca(OH)2 (slaked lime) Ca(OCl)2 + CaCl2 + 2H2O. Bleaching powder is actually a mixture of calcium hypochlorite and the basic chloride with some slaked lime.
Description : Cement containing excess amount of lime – (1) cracks during setting (2) becomes more strong (3) is slow setting (4) is quick setting
Last Answer : (1) cracks during setting Explanation: In cement almost entire amount of lime is present in combined state as calcium silicates and calcium aluminates. Cement containing excess amount of lime cracks during ... less amount of lime is weak in strength. Setting of cement is an exothermic process.
Description : Mortar is a mixture of water sand and (1) Slaked lime (2) Quick lime (3) Limestone (4) Gypsum
Last Answer : (1) Slaked lime Explanation: Mortar is a workable paste used to bind construction blocks together and fill the gaps between them. The blocks may be stone, brick, cinder blocks, etc. Mortar becomes hard ... Mortar can also be used to fix, or point, masonry when the original mortar has washed away.
Description : When quick lime is added to water (1) heat is liberated (2) heat is absorbed (3) temperature decreases (4) no heat change takes place
Last Answer : (1) heat is liberated Explanation: When quick lime is added to water, then a chemical reaction takes places and slaked lime is formed, evolving heat in this process. It makes the water boil.
Description : What is the difference between quick lime and slaked lime?
Last Answer : Quick lime is calcium oxide and slaked lime is calcium hydroxide
Description : What is Quick lime?
Last Answer : Calcium oxide
Description : When quick lime is mixed with Carbon dioxide it turns into?
Last Answer : Milky colour
Description : Slaking of lime results in the formation of (a) lime (b) quick lime (c) milk of lime (d) none of these
Last Answer : (c) milk of lime
Description : What is the common name of substance ̳X‘ (a) Slaking of lime (b) quick lime (c) both (a) and (b) (d) none of the above
Last Answer : (b) quick lime
Description : Which one of the following is an air binding material? (A) Gypsum (B) Acid-resistant cement (C) Quick lime (D) All of these
Last Answer : Answer: Option D
Description : Lime mortar is generally made with (A) Quick lime (B) Fat lime (C) Hydraulic lime (D) Plain lime
Description : For construction of structures under water, the type of lime used, is (A) Hydraulic lime (B) Fat lime (C) Quick lime (D) Pure lime
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
Description : The lime which contains mainly calcium oxide and slacks with water, is (A) Fat lime (B) Quick lime (C) Hydraulic lime (D) Poor lime
Last Answer : Answer: Option B
Description : Formula for quick lime, is (A) CaCO3 (B) Ca(OH)2 (C) CO3CO2 (D) None to thes
Description : The commonly used lime in white washing, is (A) White lime (B) Fat lime (C) Hydraulic lime (D) Quick lime
Description : Quick lime (or caustic lime) (A) Is obtained by the calcination of pure lime stone (B) Has great affinity to moisture (C) Is amorphous (D) All the above
Description : Quick lime is (i) Slow in setting (ii) Rapid in slacking (iii) Good in strength The correct answer is (A) Only (i) (B) Only (ii) (C) Both (i) and (ii) (D) Both (ii) and (
Description : Quick lime is (A) Calcium carbonate (B) Calcium oxide (C) Calcium hydroxide (D) None of the above
Description : Hydraulic lime is obtained by (A) Burning of lime stone (B) Burning of kankar (C) Adding water to quick lime (D) Calcination of pure clay
Description : Putty is (A) Made with finely powdered chalk and linseed oil (B) Used for fixing glass panes (C) Softened by a solution of pearl ash and quick-lime soaked in water (D) All the above
Description : Quick lime (A) Generates heat when added to water (B) Reacts with carbon dioxide (C) May be used for white-washing (D) All the above
Description : Pick up the correct statement from the following: (A) Quick lime is obtained by burning pure lime stone (B) Hydraulic lime is obtained by burning lime stone containing clay 5% to 30% (C) Poor lime is obtained by burning lime stone containing impurities more than 5% (D) All the above
Description : Which of the following lime can set under water also a) Fat Lime b) Lean lime* c) Hydraulic line d) Quick lime
Last Answer : b) Lean lime*
Description : Write few uses of quick lime.
Last Answer : (i) It is an important primary material for manufacturing cement and is the cheapest form of alkali. (ii) It is used in the manufacture of sodium carbonate from caustic soda. (iii) It is employed in the purification of sugar and in the manufacture of dye stuffs.
Description : How is Calcium oxide (quick lime), CaOPrepared?
Last Answer : It is prepared on a commercial scale by heating limestone(CaCO3) in a rotary kiln at 1070-1270K. The carbon dioxide is removed as soon as it is produced to enable the reaction to proceed to completion.
Description : Bleaching powder is prepared by passing : (1) Chlorine over slaked lime (2) Oxygen over slaked lime (3) Carbon dioxide over slaked lime (4) Chlorine over quick lirne
Last Answer : Chlorine over slaked lime