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Q. Describe about Dioxides? These are generally obtained by heating the element in air. The dioxides of Se and Te can also be prepared by treating the element with conc. HNO, f
A monosaccharide A has a molecular weight of 150 Da. The two stereoisomers B and C that are both optically inactive form when A reacts with NaBH4. Show all dissimilar stereoiso
An element have atomic weight 40 and it's electronic configuration is 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 . Then its atomic number and number of neutrons will be: (1) 18 and 22
Q. Determine the gluten content in the sample of flour? After undertaking this activity, you will be able to: • assess the gluten content the given sample of flour, • c
Number of unpaired electrons in Mn 4+ is: (1) 3 (2) 5 (3) 6 (4) 4 Ans: 3
When an electron revolves in a stationary orbit then: (1) It absorbs energy (2) It emits radiation (3) Its energy remains constant (4 )It gains kinetic energy Ans:
Calculate the combustion energies for the burning of 1 mol of propane and butane. It can be supposed that all reactants and products are obtained under standard conditions.
Binary phase diagrams of two component systems are usually Two dimensional plots of temperature and composition.
Q. a. What is the origin of fossil fuels? b. List three fossil fuels. c. Are fossil fuels a renewable resource? Answer: a. Coal, natural gas and oil. b. Fossil fue
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