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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.
Which of the following options are correct? 1. Three carbon atom is indicated by 'prop'. 2. Four carbon atom is indicated by 'but'. 3. Seven carbon atom is indicated by 'Hex'. 4. Nine carbon atom is indicated by 'Non'.
Which one of the following statements is incorrect ? (a) Every living organism takes C - 14 through carbon. (b) Every living being has the same proportion of carbon 14. (c) After death every living organ throws same percentage of carbon. (d) After 5568 yrs of death half of C - 14 will disappear - which is called as half life of Carbon - 14. (e) The method is used to get chronological evidence of archaeological remain. (f) This method was invented by F.W. Liby. (g) He got Nobel prize in physics for this work.
What does the term ‘carbon count’ means? 1. A measure of the amount of carbon dioxide you produce through your lifestyle every day. 2. A measure of the amount of carbon present on Earth. 3. A measure of the amount of carbon and carbon dioxide on Earth. Select the correct answer using the code given below.
The distance between the centres of carbon and oxygen in the carbon monoxide molecules is 1.13 x 10-10 m. The distance of the centre of mass of the molecule relative to the oxygen atom is _____
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)
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
Consider the following statements: 1. A water molecule is formed when two atoms of hydrogen bond covalently with an atom of oxygen. 2. The oxygen atom attracts the electrons more strongly than the hydrogen, this gives water an asymmetrical distribution of charge. 3. Molecules that have ended with partial negative and positive charges are known as polar molecules.  Which of the above statement is/are correct?
An oxygen atom produced a dipole moment of 5 X 10-23 cm when subjected to an electric field. If the separation between the center of electronic cloud and the nucleus is 4 X 10-17 m, what is the polarizability of the oxygen atom?
The reaction that takes place when an electron rich species stronger than the halide approaches the partially positive carbon atom of a haloalkane and forms a new bond with the carbon atom and in the process displacing the halogen is called a ________ reaction.