Description : What happens when a substance gains oxygen during reaction? The substance gets – (a) Oxidised (b) Reduced (c) Both oxidized and reduced (d) None of the above
Last Answer : (a) Oxidised
Description : (i) Substances oxidised is Na as it gains oxygen and oxygen is reduced. (ii) Substances reduced is Cu as hydrogen is oxidised as it gains oxygen. -Chemistry-10
Last Answer : During this reaction, the sodium is gaining oxygen and is being oxidized. Oxygen is getting reduced. During this reaction, copper oxide is losing oxygen and is being reduced. The hydrogen is gaining oxygen and is being oxidized.
Description : Assertion :- `H_(2)S+Cl_(2)rarr2HCl+S` In the above reaction, Cl has been oxidised to `Cl^(-)` while `S^(-2)` has been reduced to S Reason :- In a rea
Last Answer : Assertion :- `H_(2)S+Cl_(2)rarr2HCl+S` In the above reaction, Cl has been oxidised to `Cl^(-)` ... is False. D. If both Assertion & Reason are False.
Description : Silver halides are used in photographic plates because they are (a) Oxidised in air (b) Colourless (c) Easily soluble in a hypo solution (d) Readily reduced by light
Last Answer : Ans:(d)
Description : Identify the substances that are oxidised and the substances which are reduced in the following reactions. (i) 4Na(s) + O2(g) → 2Na2O(s) (ii) CuO (s) + H2(g) → Cu (s) + H2O(l) -Chemistry-10
Last Answer : (i) Substances oxidised is Na as it gains oxygen and oxygen is reduced. (ii) Substances reduced is Cu as hydrogen is oxidised as it gains oxygen.
Description : Silver halides are used in photographic plates because they are - (1) oxidised in air (2) soluble in hyposolution (3) reduced by light (4) totally colourless
Last Answer : (3) reduced by light Explanation: The light-sensitive chemicals used in photographic film and paper are silver halides. Silver halides are used in photographic film and photographic paper, including ... - meaning that it can undergo development which turns the entire crystal into metallic silver.
Description : When iron is rusted, it is (A) Converted to a fine powder (B) Reduced (C) Oxidised (D) None of these
Last Answer : (C) Oxidised
Description : Silver halides are used in photographic plates because they are (1) oxidised in air (2) soluble in hyposolution (3) reduced by light (4) totally colourless
Last Answer : reduced by light
Description : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than the metal, then the purification of metal may be carried
Last Answer : If the impurity in a metal has a greater affinity for oxygen and is more easily oxidised than ... B. electrorefining C. Zone refining D. POILING
Description : To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by potassium dichromate in the presence of A. Hydrochloric acid B. Sulphuric acid C. Nitric acid D. Citric acid
Last Answer : ANS: B
Description : Pick up the correct statement from the following: (A) In basic Bessemer process, the steel heats the converter (B) In open-hearth process, the furnace heats the steel (C) In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore (D) All the above
Last Answer : Answer: Option D
Description : During manufacture of H2SO4 , the oxidation of SO2 to SO3 by oxygen is an endothermic reaction. The yield of SO3 will be maximised, if the (A) Temperature is increased (B) Pressure is reduced (C) Temperature is increased and pressure is reduced (D) Temperature is reduced and pressure is increased
Last Answer : (D) Temperature is reduced and pressure is increased
Description : Which substance loses its resistance to temperature rise ?
Last Answer : Increasing the temperature increases the resistance of all conductors. This is because as the temperature increases, the vibrations of the atoms inside the conductor increase. Exceptions: But ... case of carbon and conductive materials, increasing the temperature reduces the conductive resistance.
Description : A catalyst loses its activity due to (A) Loss in surface area of the active component (B) Agglomeration of metal particles caused by thermal sintering of the solid surface (C) Covering of the catalytic active sites by a foreign substance (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration
Last Answer : NADH is oxidised to `NAD^(+)` rather slowly in fermentation, however the reaction is very vigorous in case of aerobic respiration
Description : NADH is oxidised to NAD in which reaction of glycolysis?
Last Answer : Lactate dehydrogenase reaction.
Description : Pick out the wrong statement. (A) Benzopyrene which causes cancer is present in traces in tobacco, charcoal & petrol driven automobile exhaust (B) NO2 is capable of penetrating the troposphere and ... at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2
Last Answer : (D) H2S is not at all produced during combustion of sulphur bearing fuels as all the sulphur is oxidised to SO2
Description : Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen? (1) Nascent Hydrogen (2) Water (3) Hydrogen (4) Ozone
Last Answer : (2) Water Explanation: Hydrogen peroxide (H2O2) is a water molecule with an extra oxygen atom. It is very unstable and breaks down readily into water and a single oxygen molecule. So in nutshell, when Hydrogen peroxide readily loses active oxygen, Water is formed.
Last Answer : Water
Description : When a cell loses water what happens to its size and weight?
Last Answer : Need answer
Description : What happens if a plant loses in a competition for resources?
Last Answer : it would die
Description : When a piece of zucchini is soaked in salt water the zucchini breaks down and loses its firmness which best explains what happens to the zucchini?
Last Answer : The cells in the zucchini shrink because they lose their water
Description : What happens to a company when it increases the A/P lag? a. It improves its cash position. b. It deteriorates its cash position. c. It loses credibility. d. Its suppliers withhold material for production. e. a, d.
Last Answer : e. a, d.
Description : What happens to a product priced at $1 above or below the segment guideline when a segment’s product supply outstrips demand? a. It loses 25% of its appeal. b. It loses 10% of its appeal. c. It loses 20% of its appeal. d. It loses 15% of its appeal. e. None of the above.
Last Answer : c. It loses 20% of its appeal.
Description : The organic food that are oxidised during cellular respiration are known as?
Last Answer : respiratory substrates
Description : Steels with high carbon equivalent have poor Weldability, because in these steels during welding (A) Carbon and other alloying elements get oxidised from the weld pool (B) Excessive ferrite forms in the ... of carbon and other element occurs in the weld pool leading to poor properties of the weld
Last Answer : (C) Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
Description : Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z? A) Has high melting point B) Has low melting point C) Conducts electricity in molten state D) Occurs as solid
Last Answer : B) Has low melting point
Description : Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which of the following elements is oxidised
Last Answer : Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which ... products ? A. Cu B. S C. C D. Zn
Description : Which conditions are fulfilled in case of combustion? (a) Oxygen is reduced (b) Burning compound undergoes oxidation (c) Oxygen is reducing agent (d) Both (a) and (b)
Last Answer : (d) Both (a) and (b)
Description : What happens to the force between two charges if the magnitude of both are reduced by half?
Last Answer : If there were two positive charges, one of 0.1 coulomb and the second of 0.2 coulomb, they would repel each other with a force that depends on the product 0.2 × 0.1. Thus, if each of the charges were reduced by one-half, the repulsion would be reduced to one-quarter of its former value.
Description : During the process of gas loses heat and changes into a liquid?
Last Answer : condensation
Description : Which one of the following statements is correct with respect to kidney function regulation? (a) When someone drinks lot of water, ADH release is suppressed. (b) Exposure to cold temperature ... During summer when body loses lot of water by evaporation, the release of ADH is suppressed.
Last Answer : (a) When someone drinks lot of water, ADH release is suppressed.
Description : What happens in a reduction reaction? (1) addition of Oxygen (2) addition of Nitrogen (3) addition of Hydrogen (4) None of the above
Last Answer : (3) addition of Hydrogen Explanation: In terms of Oxygen transfer, oxidation is gain of oxygen; reduction is loss of oxygen. However, in terms of hydrogen transfer, oxidation is loss of hydrogen, reduction is gain of hydrogen.
Description : What are the different ways in which glucose is oxidised to provide energy in various organisms ? -Biology
Last Answer : First step of breakdown of glucose (6 carbon molecules) takes place in the cytoplasm of cells of all organisms. This process yields a three carbon molecule compound called pyruvate. Further break ... into lactic acid (3 carbon molecule compound). Formation of lactic acid in muscles causes cramp.
Description : In anaerobic respiration, what is the net gain of ATP per glucose molecule oxidised? -Do You Know?
Last Answer : answer:
Description : What is the a biological process in which glucose and fat is oxidised to librate energy? -Do You Know?
Description : In which biological process sugar is oxidised to release energy? -Do You Know?
Description : One mole on iron [55.8 gm], when oxidised to `+2` oxidation state gives up :
Last Answer : One mole on iron [55.8 gm], when oxidised to `+2` oxidation state gives up : A. `1N_(A)` electron B ... C. `3N_(A)` electron D. `0.5` mole of electron
Description : Which of the following will not be oxidised by `O_(3)`?
Last Answer : Which of the following will not be oxidised by `O_(3)`? A. KI B. `KMnO_(4)` C. `K_(2)MnO_(4)` D. `FeSO_(4)`
Description : How many compound(s) or iron (s) can be oxidised by `H_(2)O_(2)` among the following (i) `AsO_(3)^(2)` (ii) `SO_(4)^(2-)` (iii) `Fe_(2) (SO_(4))_(3)`
Last Answer : How many compound(s) or iron (s) can be oxidised by `H_(2)O_(2)` among the following (i) `AsO_(3)^(2)` (ii) ... ` (v) `H_(2)S` (vi) PbS (vii) `O_(3)`
Description : Alkaline `KI` is oxidised by ozone to :
Last Answer : Alkaline `KI` is oxidised by ozone to : A. potassium iodate B. potassium periodate C. both (A) and (B) D. None of these
Description : The number of cornpounds.’elements oxidised by `XeF_2` among following is: HF, HBr, HCl, HI, `NH_3, CrF_2`, Pt, `S_8`
Last Answer : The number of cornpounds.’elements oxidised by `XeF_2` among following is: HF, HBr, HCl, HI, `NH_3, CrF_2`, Pt, `S_8`
Description : When thiosulphate ion is oxidised by iodine. which one of the following ion is produced ?
Last Answer : When thiosulphate ion is oxidised by iodine. which one of the following ion is produced ? A. (A) `SO_3^(2-)` B ... `S_4O_6^(2-)` D. (D) `S_2O_6^(2-)`
Description : Which is not oxidised by MnO_(2)?
Last Answer : Which is not oxidised by MnO_(2)? A. (A)`F^-` B. (B)`Cl^-` C. `Br^-` D. (D)`l^-`
Description : In basic medium, `I^(-)` is oxidised by `MnO_(4)^(-)` . In this process, `I^(-)` changes to :
Last Answer : In basic medium, `I^(-)` is oxidised by `MnO_(4)^(-)` . In this process, `I^(-)` changes to : A. `IO_(3)^(-)` B. `I_(2)` C. `IO_(4)^(-)` D. `IO^(-)`
Description : The number of moles of oxalate ions oxidised by one mole of `MnO_(4)^(-)` ion in acidic medium is :
Last Answer : The number of moles of oxalate ions oxidised by one mole of `MnO_(4)^(-)` ion in acidic medium is : A. `5//2` B. `2//5` C. `3//5` D. `5//3`