Chapter:-8 The d-and f-Block Elements POINTS TO BE REMEMBERED: --- The elements of periodic table belonging to group 3 to 12 are known as d-Block elements. The general electronic configuration of these elements is (n -1)d1-10 ns 1-2 d- Block elements are collectively known as Transition Elements because properties of these elements vary in between s-Block and p-Block elements. A transition element should have partially filled (n-1) d orbital. Group 12 elements i.e. Zn
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1. (a)Correct the following statements. (i) The melting points of crystalline and amorphous solids are not definite. The melting point of an amorphous solid is not definite. OR The melting point of a crystalline solid is definite. P Ps X solute . Ps P Ps The equation for relative lowering of vapour pressure when solute remains normal is X solute P (iii)The degree of ionization decreases with dilution. The degree of ionisation increases with dilution. (iv) Tertiary butyl halide
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AP Chemistry Chapter 17 Additional Aspects of Aqueous Equilibria Chapter 17. Additional Aspects of Equilibrium Common Student Misconceptions • • • • • Students often believe that the pH at the equivalence point for any titration is 7.00. In terms of problem-solving skills‚ this is probably the most difficult chapter for most students. Students tend to find buffers particularly difficult to understand. Students often forget to consider volume changes that occur when two solutions
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Part I Multiple choice or short answer questions 1) (2 points) Identify a solid a. Definite volume and no definite shape b. no definite volume and no definite shape c. definite volume and definite shape 2) (2 points) A substance composed of two or more elements in a fixed‚ definite proportion is a. A solution. b. A heterogeneous mixture. c. An alloy. d. A homogeneous mixture. e. A compound. 3) (2 points) Read the water
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IONIC COMPOUNDS In chemistry‚ an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually‚ the positively charged portion consists of metal cations and the negatively charged portion is an anion or polyatomic ion. Ions in ionic compounds are held together by the electrostatic forcesbetween oppositely charged bodies. Ionic compounds have high melting and boiling points‚ and they are hard and very brittle. Ions can be single atoms‚ as the sodium and chlorine in
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contains four sections‚ SECTION A to SECTION D. Instructions: Answer all questions in SECTION A - SECTION D. Make sure that the section heading is included and your answers are correctly numbered. The assignment must have a completed cover sheet. It must be placed in the drop-box on or before the deadline. st SECTION A ELECTRONIC STRUCTURE & IONIZATION ENERGY 1. 2. Write the electronic structure in s‚p‚d notation of the following: O‚ Na‚ Na+‚ Al‚ Cl- and Co
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Abstract:The Wittig Reaction is a nucleophilic addition in which an alkene is formed as a product. Both the E and Z isomers of the alkene result. Substituents on the aromatic aldehyde affect the E/Z ratio of products that form. In this experiment‚ a nitro group was used as the substituent in the ortho‚ meta and para positions‚ with benzaldehyde as the control. Each of the four aldehydes reacted with (carbethoxymethylene) triphenylphosphorane to produce ethyl cinnamate‚ ethyl-3-(2-nitrophenyl)acrylate
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* Introduction to Organic Chemistry Understand the basis of drawing organic structures Depicting 3-D structures in 2-D Most organic compounds have a three-dimensional structure. How do we represent structures on our two-dimensional page? For example‚ methane is a tetrahedral molecule: Bonds in the plane of the paper: Bonds coming towards the observer: (out of the page) Bonds going away
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Chapter 3: Survival Distributions and Life Tables Distribution function of X: Force of mortality µ(x): fX (x) 1 − FX (x) s (x) = − s(x) FX (x) = Pr(X ≤ x) µ(x) = Survival function s(x): s(x) = 1 − FX (x) Relations between survival functions and force of mortality: x Probability of death between age x and age y: Pr(x < X ≤ z) = FX (z) − FX (x) s(x) = exp − = s(x) − s(z) Pr(x < X ≤ z|X > x) = = µ(y)dy x FX (z) − FX (x) 1 − FX (x) s(x) − s(z) s(x) Derivatives: d t qx dt d t px
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Syllabus for written Recruitment Examination for the post of Post Graduate Assistant in Tamil Nadu Higher Secondary Educational Service. ghl¤Â£l« : jäœ - (Subject Code P01) ÃçÎ 1 - bkhê MuhŒ¢Áæ‹ njh‰w« - bkhê Ïd§fŸ - Âuhél bkhêfŸ - tlbkhê Âuhél bkhêfS¡»ilna cŸs ntWghLfŸ. jäê‹bjh‹ik - ca® jå¢ br«bkhê - fhyªnjhW« jäœ - bjhšfh¥Ãa® fhy¤ jäœ gšyt®‚ gh©oa®‚ nrhH® fhy¤ jäœ. ÃçÎÃçÎ-2 brh‰bwhl® mik¥ò - brh‰bghUŸ kh‰w« - ng¢R¤ jäG«‚ vG¤J¤ jäG« - fl‹ th§fš fiy¢ brhšyh¡f«.. ÃçÎ 3 - vG¤J - brhš Ïy¡fz« - ah¥ò
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