Short Questions: (5*4marks=20marks) 31. Give a reason for the following: (a) Transition metals show variable oxidation states. (b) E value of (Zn/Zn) is negative while that of (Cu/Cu) is positive. (c) Higher oxidation state of Mn with fluorine is +4 whereas with oxygen is +7. |3]. 32. What is Tollen
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31-(a) Transition metals show variable oxidation state because of their valence electron in two orbitals. Difference between the two orbitals is too less, hence both the energy levels can form bonds.
(b) Zinc (Zn) have higher tendency to loose electron when compared to that of Cupper(Cu)
(c) Mn shows +7 oxidation state with oxygen is because they are capable of forming double bonds, multiple bonds. When it comes to the case of fluorine they will become unstable.
32) Tollens is a test that is used to distinguish between aldehydes and ketones. Tollens reagent is used for silver mirror test. Aldehydes gets oxidized in Tollens and ketone wont. Tollens have ammoniacal content. EQUATION- 2AgnO3 + 2NaOH --- Ag2O(s) + 2NaNO3 + H2O.
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Answer laterapplication of two variable optimaisation technique to solve the problem of price discrimination
In addition to the mathematical notions for assigning stationary points with the help of the first partial derivatives of the two-variable function, we will classify these stationary points with the help of the second partial derivatives of the two-variable function, when the function f (x , y) reaches the maximum and when it reaches the minimum. The above notions will be applied to the profit optimisation of any enterprise that produces two goods. We will also optimise an enterprise that sells some kind of product in different markets with price discrimination.
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consider a conductor of variable cross section in which current is flowing from cross section 1 to 2. then
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In LSAT, there is a variable section. Can you elaborate on that please?
LSAT India was to be conducted in pen and paper mode this year also as always and as a result we were going to introduce the variable section but not for LSAT online, the test that is going to happen this year, there will be no variable section so there will only be four sections of the test. There will be one section of the reading comprehension, two sections of logical reasoning, and one section of analytical reasoning.
Dr. Jason Dickenson
Director, India Testing- Law School Admission Council (LSAC)
