Description : Basic metals can be converted into gold by ? A. Heating B. Beating C. Artificial nuclear radioactivity (Answer) D. Chemical reaction
Last Answer : C. Artificial nuclear radioactivity (Answer)
Description : The metals commonly used for electroplating are – (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium
Last Answer : (2) Chromium, Copper and Nickel Explanation: The process of electroplating takes place as metals in ionic form move from a positive to negative electrode. An electric current passing through the ... ability of metal objects. Plating protects by one of two ways, either sacrificially or mechanically.
Description : The metals commonly used for electroplating are (1) Gold, Sodium and Chromium (2) Chromium, Copper and Nickel (3) Nickel, Lead and Chromium (4) Gold, Sodium and Potassium
Last Answer : Chromium, Copper and Nickel
Description : The reaction `._(92)U^(235) + ._(0)n^(1) rarr ._(56)Ba^(140) + ._(36)Kr^(93) + 3 ._(0)n^(1)` represents a)Artificial radioactivity b)Nuclear fission c
Last Answer : The reaction `._(92)U^(235) + ._(0)n^(1) rarr ._(56)Ba^(140) + ._(36)Kr^( ... radioactivity B. nuclear fission C. nuclear fussion D. none of the above
Description : In the electroplating of gold, the electrolyte used is – (1) Gold chloride (2) Gold nitrate (3) Gold sulphate (4) Potassium aurocyanide
Last Answer : (3) Gold sulphate Explanation: Gold plating is a method of depositing a thin layer of gold onto the surface of another metal, most often copper or silver (to make silver-gilt), ... sulfite based electrolyte. This product is environment and user friendly and moreover the electroplating rate is good.
Description : In the electroplating of gold, the electrolyte used is (1) Gold chloride (2) Gold nitrate (3) Gold sulphate (4) Potassium aurocyanide
Last Answer : Gold sulphate
Description : What is meant by artificial radioactivity?
Last Answer : The process of generating radioactive isotopes during nuclear reaction is called artificial radioactivity.
Description : What is Artificial Radioactivity ?
Last Answer : Artificial Radioactive Substances: When an element is artificially converted to radioactive elements, those elements are called artificial radioactive elements. When an element is hit by a particle of very ... are called synthetic radioactive elements or radioisotopes. E.g. , carbon , oxygen, etc.
Description : Energy is continuously generated in the sun due to _______. (1) Nuclear fusion (2) Nuclear fission (3) Radioactivity (4) Artificial radioactivity
Last Answer : (1) Nuclear fusion Explanation: Nuclear fusion is a nuclear reaction in which two or more atomic nuclei come very close and then collide at a very high speed and join to form a new type of atomic nucleus.
Description : Hydrogen bomb is based on the principle of - (1) Double decomposition (2) Artificial radioactivity (3) Nuclear fission (4) Nuclear fusion
Last Answer : (4) Nuclear fusion Explanation: Hydrogen Bomb is based on the principle of Nuclear Fusion. Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles.
Description : Energy is continuously created in the sun due to – (1) Nuclear fusion (2) Nuclear fission (3) Radioactivity (4) Artificial radioactivity
Last Answer : (1) nuclear fusion Explanation: The central mass of the sun becomes increasingly hot and dense. eventually initiating thermonuclear fusion in its core. It is thought that almost all other stars form ... because some of the mass of the fusing nuclei is converted to energy which is released.
Description : Energy is continuously created in the sun due to: (1) nuclear fusion (2) nuclear fission (3) radioactivity (4) artificial radioactivity
Last Answer : nuclear fusion
Description : Which of the following metal is used in electroplating to make object appear shinning? a) Iron b)copper c)chromium d)aluminium
Last Answer : c)chromium
Description : Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by (A) Chemical coagulation (B) Floatation & skimming (C) Centrifugation (D) Ultra filtration
Last Answer : (A) Chemical coagulation
Description : In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as------? A. Electroplating B. Annealing C. Galvanization (Answer) D. Vulcanization
Last Answer : C. Galvanization (Answer)
Description : If in chemical reaction, `Fe^(+2)` is converted into `Fe^(+3)`, then `Fe^(+2)` -
Last Answer : If in chemical reaction, `Fe^(+2)` is converted into `Fe^(+3)`, then `Fe^(+2)` - A. ... . Loses one electron C. Gains one proton D. Loses one proton
Description : Salt A commonly used in bakery products on heating gets converted into another salt B which itself is used for removal the hardness of water and a gas C is evolved. The gas C when passed through lime water ,turns it ... © A is baking soda ,B is washing soda and C is carbon dioxide (d) both a and c
Last Answer : (d) both a and c
Description : Upon heating with `Cu_(2)S` the reaction (s) that give copper metal is /are
Last Answer : Upon heating with `Cu_(2)S` the reaction (s) that give copper metal is /are A. `CuFeS_(2)` B. `CuO` C. `Cu_(2)O` D. `CuSO_(4)`
Description : Cyclohexanol can be converted into cyclohexene by heating with (a) Zn(Hg) and HCl (b) Concentrated H2SO4 (c) SOCl2 (d) H2 and Ni
Last Answer : Concentrated H2SO4
Description : Softness of silver can be converted into hardness by alloying it with small quantity of (A) Copper & nickel (B) Zinc (C) Aluminium (D) Tin
Last Answer : (A) Copper & nickel
Description : A compound X' on heating with excess conc. sulphuric acid at 443 K gives an unsaturated compound Y'. X' also reacts with sodium metal to evolve a colourless gas Z'. Identify X', Y' ... the chemical reaction of formation of Y' and also write the role of sulphuric acid in the reaction. -Science
Last Answer : X-Ethanol/ (C2H5OH)/Ethyl AlcoholY- Ethene / (C2H4)Z- Hydrogen/ (H2)Role of sulphuric acid - dehydrating agent
Description : Analogy between mass and heat transfer is not applicable in case of (A) Same velocity profile or equal eddy diffusivities (B) Thermal or pressure mass diffusion (C) Viscous heating or chemical reaction (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : In Bessemer converter `Cu_(2)S` is converted in to blister copper in
Last Answer : In Bessemer converter `Cu_(2)S` is converted in to blister copper in A. self reduction B. reduction with ... coal gas D. reduction with `H_(2)` gas
Description : In order to prevent the corrosion of iron pipes, they are often coated with a layer of zinc. This process is termed as (a) electroplating (b) annealing (c) galvanization (d) vulcanization
Last Answer : Ans:(c)
Description : The process of electroplating involves (a) electrolysis (b) dialysis (c) osmosis (d) decomposition
Last Answer : Ans:(a)
Description : Electroplating can be carried out for 1. Preservation 2. Decoration 3. Protection from corrosion The correct statement(s) is/are: (a) 1 and 2 only (b) 1, 2 and 3 (c) 2 and 3 only (d) 1 and 3 only
Last Answer : Ans:(b)
Description : What is the aim of electroplating?
Last Answer : The aim of electroplating is to give the articles made of one metal a coating of another metal either to improve the appearance or to protect it against rusting and tarnishing.
Description : What is electroplating?
Last Answer : Electroplating is the process of plating one metal onto another by passing current through the electrolyte.
Description : What is Electroplating ?
Last Answer : Electroplating is the process of applying a thin coating of one metal over another with the help of electrolysis. A corrosive metal coating is applied to a corrosive material made of a corrosive cheap ... the nickel rod is electrified using any other material made of anode and laher as a cathode.
Description : What is the purpose or use of electroplating ?
Last Answer : : It is easily corroded by the action of air and water vapor on the material made of ordinary lacquer. As a result, they are eroded. After being coated with nickel or chromium , it does ... it has a liner inside and a chromium coating on top . Electrical coating gives greater stability to metals.
Description : What is meant by electroplating ?
Last Answer : In the process of electrolysis or electrolysis, the coating of one metal on another metal is called electroplating. In this way the durability and beauty of the metal increases and the beauty increases. For example , nickel and chromium are coated on iron.
Last Answer : Electroplating is the process of coating one metal with another in electrolysis.
Last Answer : electricity Analysis Or Electrolysis In the process A Metal On Other A Metal Cover To give Electroplating Says. This In the process Usually A Active Metal On Other A Less Active Metal Cover Given Is. Thus ... Of matter Durability, Beauty Increase Gets . E.g. Iron On Nickel , chromium Cover Given Is.
Description : In an electroplating experiment, mg of silver is deposited when 4 A of current flows for 2 min. The amount of silver (in g) deposited by 6 A of curren
Last Answer : In an electroplating experiment, mg of silver is deposited when 4 A of current flows for 2 min. The amount of silver (in ... )/(2)` C. 2m D. `(m)/(4)`
Description : How are people trying to resolve electroplating?
Last Answer : The health problems associated with chromium plating are:-1: skin rashes 2: stomach ulcers3: respiratory problems 4: weakened immune system5: kidney and liver damage. 6: Cancer / DNA damageothers are acne , ... resolve it are -1. Use of water insoluble chromium compounds2. by use of a mild steel .
Description : What is the method of electroplating?
Last Answer : Need answer
Description : In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as: A. Electroplating B. Annealing C. Galvanization D. Vulcanization
Last Answer : ANSWER: C
Description : (3) made cathode and a pure nickel red, the anode Explanation: Electroplating is the deposition by electrolysis of a coating of metal upon a conducting surface. The simplest system makes the object to be ... on the spoon is called reduction and, therefore, the spoon is also referred to as a cathode.
Last Answer : Which of the following is not a method of preparing oxygen? (1) Electrolysis of water (2) Fractional distillation of liquid air (3) Decomposition of potassium permanganate (4) Decomposition of manganese dioxide
Description : Black lung disease occurs in people working in – (1) Electroplating industry (2) Organic solvents industry (3) Paint manufacturing industry (4) Coal mines
Last Answer : (4) Coal mines Explanation: Coal worker's pneumoconiosis, colloquially referred to as black lung disease, is a lung disease that results from breathing in dust from coal, graphite, or man-made carbon ... to be removed by the body; that leads to inflammation, fibrosis, and in worse cases, necrosis.
Description : The coating of a thin layer of zinc on steel or iron objects is known as – (1) Hot dipping (2) Tinning (3) Galvanising (4) Electroplating
Last Answer : (3) Galvanising Explanation: Galvanization is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting. Although galvanization can be done with electrochemical and ... is hot-dip galvanization, in which steel parts are submerged in a bath of molten zinc.
Description : Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances. (A) Radioactive (B) Organic (C) Inorganic (D) None of these
Last Answer : (C) Inorganic
Description : Electro deposition of metals i.e. electroplating is never done on (A) Metals (B) Alloys (C) Refractories (D) Non-metals
Last Answer : (C) Refractories
Description : Pick out the wrong statement about coating/electroplating of metals. (A) Phosphate coating is used as an excellent base for paints & enamels (B) Phosphate coating is less corrosion resistant than ... coating metal is made the anode (D) Calorising is the process of coating steel with chromium
Last Answer : (D) Calorising is the process of coating steel with chromium
Description : __________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C. (A) Veneering (B) Galvanising (C) Electroplating (D) Calorising
Last Answer : (D) Calorising
Description : Case hardening is not done by (A) Nitriding (B) Hot dipping (C) Electroplating (D) Both ‘b’ & ‘c’
Last Answer : Option D
Description : Define the following : Electrochemistry , Electrolyte , Non-Electrolyte , Electrolytic Cell , Galvanic or Voltaic cell , Electrolysis , Hydrolysis & electroplating.
Last Answer : Ans : (a) Electrochemistry : Electrochemistry is the branch of chemistry which deals with such chemical reactions involving the inter-conversion of electrical energy and chemical energy. Example : Batteries , ... should be a solution of the coating metal, such as its metal nitrate or sulfate.
Description : What is electroplating and what is its objective?
Last Answer : Ans:The process in which one metal is deposited at other electrolytically. It is very useful process and following are objective of electroplating. (a) Deposition of Nobel metals on inferior metals. (b) Protection of different metals from corrosion. (c) Repair of broken machinery.
Description : Explain electroplating process
Last Answer : Electroplating Process: Electroplating may be described as a process of covering a surface or object usually metallic with a thin adherent coating of same or other metal by electrolysis. The form of ... wear. Gold, silver and platinum plating are used in jewellery and electronic industry.
Description : Compare Electroplating and Galvanizing.
Last Answer : Comparison of Electroplating and Galvanizing process:
Description : Black lung disease occurs in people working in (1) Electroplating industry (2) Organic solvents industry (3) Paint manufacturing industry (4) Coal mines
Last Answer : Coal mines