Description : The fundamental scientific principle in the operation of battery is – (1) acid-base interaction (2) dialysis (3) dissociation of electrolytes (4) oxidation-reduction
Last Answer : (3) dissociation of electrolytes Explanation: The electrolyte consists of a solvent (water, an organic liquid, or even a solid) and one or more chemicals that dissociate into ions in the solvent. These ... that contains ions and can be decomposed by electrolysis, e.g., that present in a battery.
Description : A substance which participates readily in both acid-base and oxidation-reduction reactions is:
Last Answer : A substance which participates readily in both acid-base and oxidation-reduction reactions is: A. `Na_(2) CO_(3)` B ... KMnO_(4)` D. `H_(2)C_(2)O_(4)`
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 : The washing machine works on the principle of – (1) Dialysis (2) Diffusion (3) Reverse osmosis (4) Centrifugation
Last Answer : (4) Centrifugation Explanation: Washing machines work on the principle of centrifugation. They are based on medium sized centrifuges that put an object in rotation around a fixed axis, applying force perpendicular to the axis.
Description : The working principle of a washing machine is : (1) centrifugation (2) dialysis (3) reverse osmosis (4) diffusion
Last Answer : (1) centrifugation Explanation: The working of the washing machine is quite high tech, and includes a set sequence of washing, rinsing, and spinning (plus a pre-wash if desired).
Description : The washing machine works on the principle of - (1) Dialysis (2) Diffusion (3) Reverse osmosis (4) Centrifugation
Description : The working principle of a 'Washing machine' is : (1) centrifugation (2) dialysis (3) reverse osmosis (4) diffusion
Last Answer : (1) centrifugation Explanation: The principle behind the spinning dry of the clothes in a washing machine is centrifugal force. The fast spinning around of the clothes in the drum creates a large ... wet clothes are flung outwards to the drum edge and the water escapes through the drum holes.
Description : The washing machine works on the principle of (1) Dialysis (2) Diffusion (3) Reverse osmosis (4) Centrifugation
Last Answer : Centrifugation
Description : During electrolytic reduction of alumina , two auxiliary electrolytes X and Y are added to increase the electrical conductance and lower the temperatu
Last Answer : During electrolytic reduction of alumina , two auxiliary electrolytes X and Y are added to increase ... . alum and flourspar D. flourspar and bauxite
Description : Titanium is produced by __________ of Ti Cl4. (A) Electrolytic reduction (B) Calcium reduction (C) Magnesium reduction (D) Thermal dissociation
Last Answer : (C) Magnesium reduction
Description : To prevent local action in battery, only …………is used in electrolytes A. Pump water B. Distilled water C. Tap water D. Both A and C
Last Answer : B. Distilled water
Description : Can a battery be recharged by adding more electrolytes?
Last Answer : No, a current must be passed through the battery.
Description : The state of charge of the battery is indicated by the electrolyte's : (A) mass (B) colour (C) viscosity (D) specific gravity
Last Answer : The state of charge of the battery is indicated by the electrolyte's : specific gravity
Description : The working principle of a washing machine is? A. Diffusion B. Reverse osmosis C. Dialysis D. Centrifugation
Last Answer : ANSWER: D
Description : If helium is introduced in a reactor containing O2 , SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 ( ... 's principle). (A) Decreases (B) Increases (C) Remains unaltered (D) Changes unpredictably
Last Answer : (A) Decreases
Description : The termination of heparin activity by protamine sulfate is due to (a) A chelating action (b) The inhibition of gastrointestinal absorption of heparin (c) The displacement of heparin-plasma protein binding (d) An acid-base interaction (e) The prothrombin-like activity of protamine
Last Answer : Ans: D
Description : What's the most fundamental common denominator in human interaction?
Last Answer : Necessity
Description : In most mammals, except primates, uric acid is metabolized by (A) Oxidation to allantoin (B) Reduction to NH3 (C) Hydrolysis to allantoin (D) Hydrolysis to NH3
Last Answer : Answer : A
Description : In mammals other than higher primates uric acid is converted by (A) Oxidation to allantoin (B) Reduction to ammonia (C) Hydrolysis to ammonia (D) Hydrolysis to allantoin
Description : Which of the following coenzyme takes part in oxidation-reduction reactions? (A) Pyridoxal phosphate (B) Lipoic acid (C) Thiamin diphosphate (D) None of these
Last Answer : Answer : B
Description : Decomposition of the acetyl salicylic acid at room temperature most likely would occur by (a) Oxidation of the ester (b) Reduction of the carboxylic acid (c) Hydrolysis of the ester
Last Answer : Ans: C
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 : 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 : who Study this Song dynasty painting depicting daily life. The social interaction shown in the house in this painting illustrates a key principle from which Chinese philosophy?
Last Answer : Confucianism
Description : Which of the following is based upon the principle of antigen - antibody interaction?
Last Answer : Which of the following is based upon the principle of antigen - antibody interaction? A. PCR B. ELISA C. r-DNA technology D. RNA
Description : Which of the following terms refers to a state of microorganisms being present within a host without causing host interference or interaction? a) Colonization Understanding the principle of colonization ... to a particular pathogen. d) Infection Infection refers to host interaction with an organism.
Last Answer : a) Colonization Understanding the principle of colonization facilitates interpretation of microbiologic reports.
Description : A breakable, mercury-filled thermometer should not be used in a lead-acid battery to measure electrolyte temperature, as an accidental breakage can cause ____________. A. severe sparking and explosions ... battery plates C. violent gassing at the positive plates D. corrosion on the battery terminals
Last Answer : Answer: A
Description : Which of the following statements is false about aniline? (a) It is a primary aromatic amine. (b) It is a weak base which forms salts with acids. (c) It liberates nitrogen on treatment with ice-cold nitrous acid. (d) It can be prepared by the reduction of nitrobenzene with tin and HCl
Last Answer : It liberates nitrogen on treatment with ice-cold nitrous acid
Description : Aniline undergoes oxidation with Na2Cr2O7/H2SO4 to give (a) Schiff's base (b) p-Benzoquinone (c) Phenol (d) Benzoic acid
Last Answer : p-Benzoquinone
Description : The pH of an amino acid depends (A) Optical rotation (B) Dissociation constant (C) Diffusion coefficient(D) Chain length
Description : In case of the decomposition of hydroiodic acid (2HI ⇌ H2 + I2), addition of H2(at equilibrium condition) will (A) Increase the partial pressure of I2 (B) Decrease the partial pressure of HI (C) Diminish the degree of dissociation of HI (D) None of these
Last Answer : (C) Diminish the degree of dissociation of HI
Description : Which of the following statements of Coast Guard Regulations (46 CFR) concerning battery installations is correct? A. Sign, permanently secured to the battery trays, indicating that 'naked lights or smoking is ... on the bottom. D. Power and lighting batteries must be of the lead-acid type only.
Last Answer : Answer: C
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.
Description : One gas bleaches the colour of flowers by reduction and other by oxidation. These gases are
Last Answer : One gas bleaches the colour of flowers by reduction and other by oxidation. These gases are A. (A) `SO_2,CI_2` ... ) `H_2S, Br_2 ` D. (D) `NH_3, SO_3`
Description : Asserarion:Bleaching action action of `SO_(2)` is temporary and by reduction. Reason: The colour of material is regained due to oxidation by air.
Last Answer : Asserarion:Bleaching action action of `SO_(2)` is temporary and by reduction. Reason: The colour of material is regained due to oxidation by air.
Last Answer : Asserarion:Bleaching action action of `SO_(2)` is temporary and by reduction. Reason: The colour of ... -I is not correct and Statement-II is correct
Last Answer : One gas bleaches the colour of flowers by reduction and other by oxidation. These gases are A. CO and `CO_(2)` B. ... Cl_(2)` D. `NH_(3)` and `SO_(3)`
Description : In the above chemical reaction which element does undergo oxidation and which does undergo reduction?
Last Answer : 2Na(s) + H2(g) \(\overset{\Delta}\longrightarrow\) 2NaH(s) In the above ... element does undergo oxidation and which does undergo 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 : Coenzymes are required in which of the following reactions? (A) Oxidation-reduction (B) Transamination (C) Phosphorylation (D) All of these
Last Answer : Answer : D
Description : The activity of tocopherols is destroyed by (A) Oxidation (B) Reduction (C) Conjugation (D) All of these
Description : Biluveridin is converted to bilirubin by the process of (A) Oxidation (B) Reduction (C) Conjugation (D) Decarboxylation
Description : The disulphide bond is not broken under the usual conditions of (A) Filtration (B) Reduction (C) Oxidation (D) Denaturation
Description : In a protein molecule the disulphide bond is not broken by (A) Reduction (B) Oxidation (C) Denaturation (D) X-ray diffraction
Last Answer : Answer : C