Description : Setting of plaster of paris involves – (1) dehydration process (2) hydration to form other hydrates (3) oxidation process (4) reduction process
Last Answer : (2) hydration to form other hydrates Explanation: The setting of plaster of Paris takes place by hydration due to the formation of a solid crystalline hydrate and hardening of Plaster of Paris is ... . A slight expansion takes place in the process and heat is evolved. This process is exothermic.
Description : The biochemical treatment applied to sewage effluents is a process of (A) Dehydration (B) Reduction (C) Oxidation (D) Polymerisation
Last Answer : (C) Oxidation
Description : Setting of plaster of paris involves (1) dehydration process (2) hydration to form other hydrates (3) oxidation process (4) reduction process
Last Answer : hydration to form other hydrates
Description : Sulphur dioxide bleaches colouring matter by – (1) Reduction (2) Dehydration (3) Decomposition (4) Oxidation
Last Answer : (1) Reduction Explanation: Sulphur dioxide gas exhibits bleaching properties in presence of moisture. It dissolves in water liberating nascent hydrogen. Nascent hydrogen removes oxygen atoms from the colouring matter (reduces colouring matter) and it loses its colour.
Description : Which of the following processes is involved in the biochemical treatment of sewage effluents? (A) Oxidation (B) Reduction (C) Dehydration (D) Fermentation
Last Answer : (A) Oxidation
Description : The action of concentrated sulfuric acid on sugar best described as: w) catalysis x) oxidation y) reduction z) dehydration
Last Answer : ANSWER: Z -- DEHYDRATION
Description : Sulphur dioxide bleaches colouring matter by : (1) Reduction (2) Dehydration (3) Decomposition (4) Oxidation
Last Answer : Reduction
Description : The remains of salt over the soil after evaporation of water is known as a. water logging b. salivation c. dehydration d. hydration
Last Answer : d. hydration
Description : Mechanism of moisture removal in case of freeze drying of food stuff is by (A) Evaporation (B) Sublimation (C) Dehydration (D) Adsorption
Last Answer : (B) Sublimation
Description : Styrene is produced from ethyl benzene by the process of (A) Dehydrogenation (B) Oxidation (C) Alkylation (D) Dehydration
Last Answer : (A) Dehydrogenation
Description : Reduction or elimination of dormancy in crop plant is due to : a. Domestication b. Hybridization c. Mutation h. Acclimatization
Last Answer : Acclimatization
Description : Which is not accomplished in an underfired furnace? (A) Increase in heating capacity/m2 of floor space (B) Elimination of cold spot at the bottom of the charge (C) Reduction in the temperature of furnace gases (D) Protection of the periphery of the charge from excessive radiation
Last Answer : (A) Increase in heating capacity/m2 of floor space
Description : Benzene cannot undergo – (1) Substitution (2) Addition (3) Elimination (4) Oxidation
Last Answer : (3) Elimination Explanation: Benzene can not undergo Elimination reaction.
Description : Atmospheric corrosion of metals result from their (A) Slow oxidation (B) Fast oxidation (C) Fast hydration (D) Slow dehydration
Last Answer : (A) Slow oxidation
Description : Gobar gas is produced by the __________ of 'gobar' (cow dung). (A) Hydrolysis (B) Fermentation (C) Oxidation (D) Dehydration
Last Answer : (B) Fermentation
Description : Benzene cannot undergo : (1) Substitution (2) Addition (3) Elimination (4) Oxidation
Last Answer : Elimination
Description : Cement setting under water employs a/an __________ process. (A) Hydration (B) Decomposition (C) Oxidation (D) Reduction
Last Answer : (A) Hydration
Description : Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal. (A) Burning (B) Intensive oxidation (C) Evaporation (D) None of these
Last Answer : Option B
Description : Biluveridin is converted to bilirubin by the process of (A) Oxidation (B) Reduction (C) Conjugation (D) Decarboxylation
Last Answer : Answer : B
Description : The oxidation reduction process is
Last Answer : Ans. Photosynthesis
Description : Rusting is the process of – (1) Oxidation (2) Reduction (3) Decomposition (4) Displacement
Last Answer : (1) Oxidation Explanation: Rust is the process of iron (molecules) oxidizing into iron oxide, or rust. General formula of rust is Fe2O3.nH2O
Description : The manufacturing of iron from ironore involves the process of - (1) Oxidation (2) Reduction (3) Electrolysis (4) Fractional distillation
Last Answer : (2) Reduction Explanation: Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as hematite contain iron oxide. The oxygen must be removed from the iron oxide to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.
Description : The manufacture of iron from iron ore involves the process of – (1) oxidation (2) reduction (3) fractional distillation (4) electrolysis
Last Answer : (2) reduction Explanation: The manufacture of iron ore involves the process of reduction. Important ores of iron : Haematite, Magnetite.
Description : What is the process by which an atom gains electrons? w) Reduction x) Neutralization y) Electrolysis z) Oxidation
Last Answer : ANSWER: W -- REDUCTION
Description : The manufacturing of iron from ironore involves the process of (1) Oxidation (2) Reduction (3) Electrolysis (4) Fractional distillation
Description : The manufacture of iron from iron ore involves the process of (1) oxidation (2) reduction (3) fractional distillation (4) electrolysis
Last Answer : reduction
Description : The oxidation-reduction system having the highest redox potential is (A) Ubiquinone ox/red (B) Fe3+ cytochrome a/Fe2+ (C) Fe3+ cytochrome b/Fe2+ (D) NAD+/NADH
Description : The process by which an amino acid loses its amino group is called: a) hydration b) deamination c) oxidoamination d) dehydration
Last Answer : ANSWER: B -- DEAMINATION
Description : The reaction between an acid and a base to give a salt and water is known as a - (1) Neutralisation reaction (2) Reduction reaction (3) Oxidation reaction (4) Exothermic reaction
Last Answer : (1) Neutralisation reaction Explanation: The effect of a base is nullified by an acid and vice-versa. Example: Reaction of Sodium hydroxide with hydrochloric acidNaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)
Description : Which of the following reactions involve NEITHER oxidation nor reduction? w) burning antimony in chlorine x) decomposition of potassium chlorate y) reaction of sodium with water z) reaction of potassium hydroxide with nitric acid
Last Answer : ANSWER: Z -- REACTION OF POTASSIUM HYDROXIDE WITH NITRIC ACID
Description : The BOD values of water indicate the (1) amount of organic debris (2) amount of oxygen used for biochemical oxidation (3) amount of oxygen used for biochemical reduction (4) amount of ozone used for biochemical oxidation
Last Answer : amount of oxygen used for biochemical oxidation
Description : The reduction of the PH value, by the action of atmospheric carbon dioxide with the alkali of the cement paste is called [ A ] atmospheric corrosion [ B ] chloride corrosion [ C ] oxidation [ D ] carbonation
Last Answer : [ D ] carbonation
Description : Many microbes can effect the chemical process of (a) Dehydration (b) Decomposition (c) Fermentation (d) Polymerisation
Last Answer : Ans:(c)
Description : The reaction between methane and chlorine in diffused sunlight is-----? A. Oxidation B. Reduction C. Polymerisation D. Radical substitution (Answer)
Last Answer : D. Radical substitution (Answer)
Description : Bleaching action of chlorine is by----? A. Oxidation (Answer) B. Reduction C. Decomposition D. Hydrolysis
Last Answer : A. Oxidation (Answer)
Description : Rusting of Iron involves--------? A. Reduction B. Oxidation (Answer) C. Decomposition D. Displacement
Last Answer : B. Oxidation (Answer)
Description : During decomposition, energy is absorbed in the form of heat, light or electricity for breaking down the reactants which is known as: (a) exothermic reaction (b) endothermic reaction (c) reduction reaction (d) oxidation
Last Answer : (b) endothermic reaction
Description : What is the mixing process? A. Distortion caused by auroral propagation B. The combination of two signals to produce sum and difference frequencies. C. The elimination of noise in wideband receiver by phase differentiation D. The elimination of noise in a wideband receiver by phase comparison
Last Answer : B. The combination of two signals to produce sum and difference frequencies.
Description : Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent ... nitration temperature (C) Lower solvent dilution ratio (D) All (A), (B) & (C)
Last Answer : (D) All (A), (B) & (C)
Description : Pick out the wrong statement. (A) Dehydration of ammonium carbamate to produce urea is endothermic (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India ... manufacture of ortho-phosphoric acid (D) Phosphate rock when reacted with dilute H2SO4 produces superphosphate
Last Answer : (B) Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
Description : The process used for the manufacture of ethyl alcohol from molasses is (A) Distillation (B) Dehydration (C) Dehydrogenation (D) None of these
Last Answer : (D) None of these
Description : Product elimination can best be described as the process of deleting a product from the product mix when it A)is perceived as a failure by top management. B)increases production costs and ... C)no longer responds to promotional efforts. D)no longer satisfies a sufficient number of customers.
Last Answer : D)no longer satisfies a sufficient number of customers.
Description : Respiration as cellular oxidation and reduction? -Biology
Last Answer : answer:
Description : Which of the following reaction is spontaneous oxidation - reduction reaction
Last Answer : Which of the following reaction is spontaneous oxidation - reduction reaction A. `Mn^(+2)+5Fe^(+3)+4H_(2) ... OrarrMnO_(4)^(-)+5Fe^(+3)+8H^(+)`
Description : Which of the following reactions involves neither oxidation nor reduction ?
Last Answer : Which of the following reactions involves neither oxidation nor reduction ? A. `CrO_(4)^(2-)rarrCr_(2)O_(7)^(2-)` ... 2)O_(3)^(2-)rarrS_(4)O_(6)^(2-)`
Description : Which of the following reaction involves oxidation reduction?
Last Answer : Which of the following reaction involves oxidation reduction? A. `NaBr+Hclrarr NaCl+HBr` B. `HBr + AgNO_(3)rarr ... )O` D. `H_(2)+Br_(2) rarr 2HBr`
Description : In respiration, energy of oxidation reduction is utilised for the production of proton gradient required for phosphorylation.
Last Answer : In respiration, energy of oxidation reduction is utilised for the production of proton gradient required for phosphorylation.