Description : Rock phosphate constitutes mainly of (A) Fluorapatite (B) Di-calcium phosphate (C) Mono-calcium phosphate (D) Di-ammonium phosphate
Last Answer : (A) Fluorapatite
Description : Main constituent of phosphate rock is (A) Ammonium phosphate (B) Flour apatite (C) Calcium fluoride (D) Calcium phosphate
Last Answer : (B) Flour apatite
Description : The main constituent of cement which is responsible for initial setting of cement is (A) Di-calcium silicate (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) All of the above
Last Answer : Answer: Option C
Description : Main constituent of bone ash is (A) Ammonium phosphate (B) Calcium phosphate (C) Animal charcoal (D) Ammonium sulphate
Last Answer : (B) Calcium phosphate
Description : The constituent of cement which is responsible for all the undesirable properties of cement is (A) Di-calcium silicate (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Description : Microsomal hydroxylase system contains a (A) Di-oxygenase (B) Mono-oxygenase (C) Both (A) and (B) (D) None of thse
Last Answer : Answer : B
Description : Rare gases are - (1) Mono atomic (2) di atomic (3) tri atomic (4) none of above
Last Answer : (1) Mono atomic Explanation: The so-called "rare" gases Neon (Ne), Krypton (Kr) and Xenon (Xe), are present in air in very low concentrations.
Description : The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form (A) Mono-chloramine (NHCl) (B) Di-chloramine (NH2Cl) (C) Nitrogen tri-chloramine (NCl3) (D) All the above
Last Answer : (D) All the above
Description : ________ present in air helps in combustion of fuel. a) oxygen b)nitrogen c)carbon-di-oxide d)carbon –mono-oxide
Last Answer : a) oxygen
Description : The Refrigerant 'FREON' is – (1) Calcium Tetra Fluoride (2) Difluoro Dichloro Methane (3) Fluorspar and Felspar (4) Hydrofluosilicic Acid
Last Answer : (2) Difluoro Dichloro Methane Explanation: Dichlorodifluorornethane (R-12), is a colourless gas, and usually sold under the brand name Freon-12, is a chlorofluorocarbon halornethane (CFC), used as a ... 1994 clue to concerns about damage to the ozone layer. It is soluble in many organic solvents.
Description : The Refrigerant ‘FREON' is (1) Calcium Tetra Fluoride (2) Difluoro Dichloro Methane (3) Fluorspar and Felspar (4) Hydrofluosilicic Acid
Last Answer : Difluoro Dichloro Methane
Description : The basic constituent of vegetable oils is (A) Triglyceride (B) Fatty acids (C) Fatty alcohol (D) Mono esters
Last Answer : (A) Triglyceride
Description : ________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant. (A) Calcium (B) Fluorine (C) Phosphorous (D) Sulphur
Last Answer : (B) Fluorine
Description : Current concepts concerning the intestinal absorption of triacylglycerols are that (A) They must be completely hydrolysed before the constituent fatty acids can be absorbed (B) They are hydrolysed partially ... portal blood (D) In the absence of bile the hydrolysis of triacyl glycerols is absorbed
Description : In EM pathway -2-phosphoglycerate is converted to (A) Phospho enol pyruvate (B) Enol pyruvate (C) Di hydroxy acetone phosphate (DHAP) (D) 1,3 bisphosphoglycerate
Last Answer : A
Description : What is the mechanism of inhibitory action of Di-isopropyl fluoro phosphate?
Last Answer : It inhibits enzymes with serine in their active centres, e.g. acetylcholine esterase.
Description : Explain the manufacturing of Di-ammonium phosphate with a process flow diagram.
Last Answer : Di Ammonium Phosphate Anhydrous and dry ammonia and phosphoric acid are charged into the first reactor. About 80% neutralization is done in the first reactor. Further ammonia is added to second reactor. So conversion to ... . Reaction NH3 + H3PO4 → NH4H2PO4 NH3 + NH4H2PO → (NH4)2HPO4
Description : Explain the manufacturing process of Di-Ammonium Phosphate.
Last Answer : Di Ammonium Phosphate Anhydrous and dry ammonia and phosphoric acid are charged into the first reactor. About 80% neutralization is done in the first reactor. Further ammonia is added to second reactor. So ... obtained. Reaction NH3 + H3PO4 NH4H2PO4 NH3 + NH4H2PO (NH4)2HPO4
Description : The main constituent of carborundum is __________ carbide. (A) Calcium (B) Silicon (C) Boron (D) Aluminium
Last Answer : (B) Silicon
Description : Main component of bone ash is (A) Calcium sulphate (B) Calcium phosphate (C) Calcium carbonate (D) Sodium phosphate
Last Answer : what is the answer ?
Description : Which of the following is not a non-metalliferous mineral? (A) Calcite (B) Fluorspar (C) Quartz (D) Cassiterite
Last Answer : (C) Quartz (D) Cassiterite
Description : The main constituent of hemoglobin is------? A. Chlorine B. Iron (Answer) C. Calcium D. None of these
Last Answer : B. Iron (Answer)
Description : The main constituent which imparts hydraulicity to hydraulic lime is (A) Calcium oxide (B) Silica (C) Clay (D) Water
Description : The main constituent of hemoglobin is A.Chlorine B.Iron C.Calcium D.None of these
Last Answer : B.Iron
Description : Which gas is produced after the application of Calcium Carbide to the fruits, for rapid ripening? a. Methane b. Carbon-di-oxide c. Acetylene d. Ethylene
Last Answer : c. Acetylene
Description : Di-calcium silicate (C2S) (A) Hydrates rapidly (B) Generates less heat of hydration (C) Hardens rapidly (D) Provides less ultimate strength to cement
Last Answer : Answer: Option B
Description : The compound of Portland cement which reacts immediately with water and also sets first is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Description : Initial setting of cement is caused due to (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Description : The compound of Portland cement which contributes to the strength after two to three years is (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra-calcium alumino ferrite
Description : Pick up the compound responsible for early strength of cement from the following: (A) Tetra-calcium alumino-ferrite (B) Tri-calcium silicate (C) Tri-calcium aluminate (D) Di-calcium silicate
Description : Good quality cement contains higher percentage of (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Last Answer : Answer: Option A
Description : Ultimate strength to cement is provided by (A) Tri-calcium silicate (B) Di-calcium silicate (C) Tri-calcium aluminate (D) Tetra calcium alumino ferrite
Description : Rapid hardening cement contains (A) Tri-calcium silicate (B) Tri-calcium aluminate (C) Tetra-calcium alumino-ferrite (D) Di-calcium silicate
Description : In the cement the compound quickest to react with water, is (A) Tri-calcium aluminate (B) Tetra-calcium alumino-ferrite (C) Tri-calcium silicate (D) Di-calcium silicate
Description : To retard the initial setting time of cement, the compound responsible, is (A) Tri-calcium silicate (B) Gypsum (C) Di-calcium silicate (D) Tri-calcium aluminate
Description : The first compound which reacts with water when mixed with cement is (a) Tricalcium Aluminate (b) Tricalcium silicate (c) Di-calcium silicate (d) Teracalcium aluminate
Last Answer : (a) Tricalcium Aluminate
Description : The main chemical substance present in the bones and teeth of animals is: A. Sodium Chloride B. Sugar C. Calcium Phosphate D. Calcium sulphate
Last Answer : ANSWER: C
Description : The main chemical substance present in the bones and teeth of animal is (a) sodium chloride (b) sugar (c) calcium phosphate (d) calcium sulphate
Last Answer : Ans:(c)
Description : What is the main component of bones and teeth? A. Calcium carbonate B. Calcium phosphate (Answer) C. Calcium sulphate D. Calcium nitrate
Last Answer : B. Calcium phosphate (Answer)
Description : What is the main component of bones and teeth? A.Calcium carbonate B.Calcium phosphate C.Calcium sulphate D.Calcium nitrate
Last Answer : B.Calcium phosphate
Description : The function of fluorspar in the electrolytic reduction of alumnia dissolved in fused cryotile `(Na_(3)AlF_(6))` is:
Last Answer : The function of fluorspar in the electrolytic reduction of alumnia dissolved in fused cryotile `(Na_(3 ... rate of oxidation of carbon at the cathode
Description : The ore of Aluminium is - (1) Fluorspar (2) Bauxite (3) Chalco pyrites (4) Hematite
Last Answer : (2) Bauxite Explanation: Bauxite, an aluminium ore, is the world's main source of aluminium. Bauxite is priinarily comprised of aluminum oxide compounds (alumina), silica, iron oxides and titanium dioxide. It is refined through the Bayer chemical process into alumina.
Description : The important ore of aluminium is – (1) bauxite (2) cryolite (3) fluorspar (4) haematite
Last Answer : (1) bauxite Explanation: Bauxite is an aluminium ore and is the main source of aluminium. This form of rock consists mostly of the minerals gibbsite, boehmite and diaspore , in a mixture ... it was first recognized as containing aluminium and named by the French geologist Pierre Berthier in 1821.
Description : The compound known as fluorspar?
Last Answer : Calcium Fluoride
Description : The ore of Aluminium is (1) Fluorspar (2) Bauxite (3) Chalco pyrites (4) Hematite
Last Answer : Bauxite
Description : The important ore of aluminium is (1) bauxite (2) cryolite (3) fluorspar (4) haematite
Last Answer : bauxite
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 : 6. __________ is a special constituent of chlorophyll without which photosynthesis is not possible. (A) Calcium (B) Nitrogen (C) Phosphorous (D) Hydrogen
Last Answer : Option B
Description : Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with (A) Acidic refractory (B) Rubber (C) Karbate (D) Lead or acid proof bricks
Last Answer : (A) Acidic refractory