5.A] Explain the synthesis and application of Polyurethane. Answer:- Synthesis of Polyurethane: Polyurethane often abbreviated PUR and PU refers to a class of polymers composed of organic units joined by…
4.C] Explain the factors affecting the rate of corrosion (i) Nature of corrosion product, (ii) Ratio of anodic to cathodic areas (iii) pH Answer:- (i) Nature of corrosion product The…
4.B] What is electroless plating? Explain the electroless plating of copper. Answer:- Deposition of a metal from its salt solution on a catalytically active surface by a suitable reducing agent…
4.A] What is meant by metal finishing? Mention (any five) technological importance of metal finishing. Answer:- It is a process in which a specimen metal (article) is coated with another…
3.C] What is electroplating? Explain the electroplating of chromium Answer:- Electroplating is the process in which base metal is uniformly coated with suitable metal by electrodeposition. Electroplating of chromium is…
3.B] Explain: (i) Differential metal corrosion & (ii) Water-line corrosion Answer:- (i) Differential metal corrosion “The corrosion of metals when two dissimilar metals are in contact with each other in…
3.A] Define metallic corrosion? Describe the electrochemical theory of corrosion taking iron as an example. Answer:- According to this theory corrosion of the metals takes place through the formation of…
2.C] For the cell, Fe/Fe2+ (0.01M)//Ag+ (0.1M)/Ag write the cell reaction and calculate the emf of the cell at 298K, if standard electrode potentials of Fe and Ag electrodes are…
2.B] Explain construction and working of glass electrode. Answer: construction and working of glass electrode: Glass electrode is pH sensitive electrode which can selectively detect and measures H+ ions in…
2.A] Distinguish between primary, secondary and reserve batteries. Answer: Classification of Batteries: Batteries are classified as primary (non-rechargeable), secondary (rechargeable) and reserve (inactive until activated) Differences are given below:
