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Which of the following statements is correct regarding the oxidation number of Oxygen? I. The oxidation number of Oxygen in most compounds is -2. II. When Oxygen is bonded to Fluorine in compounds like Oxygen difluoride and Dioxygen diflouride, the Oxygen is assigned an oxidation number of +2 and +2 respectively. III. In peroxide, an Oxygen atom is assigned an oxidation number of -1 and in Superoxide, each oxygen atom is assigned an oxidation number of -1/2.
Each question comprises of a statement and two conclusions I) and II). Assuming that the statement is true, which of the conclusions follow logically from the statement? Statement: Because of growth in production of Aluminium by National Aluminium Company, India has become self-sufficient in Aluminium. Conclusion: I) Previously India had to import Aluminium. II) At this rate, India may start exporting Aluminium.
Which one of the following is NOT correctly matched? Aluminium Plants Location (a) Madras Aluminium Company Limited (MALCO) Chennai (b) Bharat Aluminium Company Limited (BALCO) Korba (c) Hindustan Aluminium Corporation Limited (HINDALCO) Renukoot (d) Indian Aluminium Company Limited (INDAL) Hirakud
In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The KLa for such a system will be (KLa = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)
How many moles of iron oxide are needed to react with 8 moles of aluminium to form 4 moles of aluminium oxide?
The process of forming a thick oxide layer of aluminium oxide on the surface of aluminium so as to protect it from corrosion is called:
Which of the following are correct Greenhouse gases? (a) Water Vapour, Oxygen, Methane (b) Nitrogen oxide, Oxygen, Carbon Tetrachloride (c) Ozone, Carbon Tetrachloride, Methane (d) Water Vapour, Carbon Tetrachloride, Nitrogen oxide
Which of the following chemical parameters are associated with the organic content of water? 1. Biochemical Oxygen Demand (BOD) 2. Chemical Oxygen Demand (COD) 3. Total Organic Carbon (TOC) and Total Oxygen Demand (TOD)
There are two alloys of copper and aluminium, alloy A has 40% aluminium and alloy B has 10% copper. In what ratio should these alloys be mixed so that the cost of total copper becomes equal to the cost of total aluminium in the mixture? (The cost price of aluminium is Rs. 200 per kg and cost price of copper is Rs. 500 per kg)
Two similar bars of Steel and Aluminium are heated to a same temperature. Forces are applied at the ends of the bars to maintain their lengths unaltered. If the ratio of Young’s moduli of Steel and Aluminium is 3, and the ratio of the coefficients of thermal expansion of Steel to that of Aluminium is 0.5, what is the stress on the Aluminium bar if the stress on the Steel bar is 100 MPa?