087/X/SA2/05/A1 Class - X SOCIAL SCIENCE Time : 3 hours â×Ø Ñ 3 æÅðU Maximum Marks : 80 ¥çÏ·¤Ì× ¥´·¤ Ñ 80 Total No. of Pages : 11 Instructions : 1. The question paper has 36 questions in all. All questions are compulsory. 2. Marks are indicated against each question. 3. Questions from serial number 1 - 16 are multiple choice Questions (MCQs) of 1 mark each. Every MCQ is provided with four alternatives. Write the correct alternative in your answer book. 4. Questions
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The VSEPR Model 10.33 Predict the shape or geometry of the following mole- cules‚ using the VSEPR model. a. SiF4 b. SF2 c. COF2 d. PCl3 10.34 Use the electron-pair repulsion model to predict the geometry of the following molecules: a. GeCl2 b. NF3 c. SCl2 d. XeO4 10.35 Predict the geometry of the following ions‚ using the electron-pair repulsion model. a. ClO3? b. PO43? c. SCN? d. H3O? 10.36 Use the VSEPR model to predict the geometry of the fol- lowing ions: a. N3? b. BH4? c. SO32? d. NO2
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mechanical explanations (Wozniak). Most of the contributions were in the category of philosophy and reasoning‚ but a lot of the important ones had to deal with math and science. Out of all the contributions Rene Descartes has made‚ the idea of analytic geometry is one of his most famous works and contributions to today’s mathematical world. Descartes was born on March 31‚ 1596 in the town of La Haye‚ which was renamed Descartes‚ in France. He was the son of an intellectual and Councilor in the French
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outstanding genius who studied geometry as a child. At the age of sixteen he stated and proved Pascal’s Theorem‚ a fact relating any six points on any conic section. The Theorem is sometimes called the "Cat’s Cradle" or the "Mystic Hexagram." Pascal followed up this result by showing that each of Apollonius’ famous theorems about conic sections was a corollary of the Mystic Hexagram; along with Gérard Desargues (1591-1661)‚ he was a key pioneer of projective geometry. He also made important early
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these molecules can be predicted from their Lewis structures‚ however‚ with a model developed about 30 years ago‚ known as the valence-shell electron-pair repulsion (VSEPR) theory. The VSEPR theory assumes that each atom in a molecule will achieve a geometry that minimizes the repulsion between electrons in the valence shell of that atom. The five compounds shown in the figure below can be used to demonstrate how the VSEPR theory can be applied to simple molecules. There are only two places in the
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My Career Goals as an Artist My goal is to attain a career where I can express my artistic talent and passion for art as well as open my mind in ways that I could never do in any other field .To obtain these goals‚ I must set a track. After considering many other career opportunities‚ such as the army‚ attempting to obtain a job at Boeing‚ and looking into various other art colleges ‚to name a few‚ I have found that the Art Institute of Seattle has just the programs I’m looking for and just what
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Composition of Concurrent Forces Abstract— The experiment aims to show the relationship of different forces acting at the same time by using different variables namely‚ the equilibrant force‚ the resultant‚ and the given forces Fa and Fb. The equilibrant force is the force that establishes equilibrium while the resultant is the addition of the given forces and is also the opposite of the equilibrant. The objective of the experiment is to determine the resultant of two forces experimentally‚ to
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Communication in the Classroom Week 1 Assignment 1 Orientation 09/11/12 Communication in the Classroom A college class discussion would differ from a casual conversation with a friend in that there are many viewpoints‚ from your classmates and professor‚ that you need to take into consideration when communicating your thoughts and ideas in an open classroom discussion‚ where as in a casual conversation with a friend you would probably feel more comfortable expressing your point of
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Directed Line Segment: VECTORS • A line segment with direction is called a directed line segment. • If ‘A’ and ‘B’ are two distinct points in the space‚ then the ordered pair (A‚ B) is called as a directed line segment and is denoted by """""# . ! • In """""# ‚ ‘A’ is called initial point and ‘B’ is called terminal ! point of """""# . ! • The distance from ‘A’ to ‘B’ is called the length or magnitude of """""# . The length or magnitude of """""# ! ! is denoted by ’"""""# ’. Thus
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Name Noah Meador___ Motion in 2D Simulation Go to http://phet.colorado.edu/simulations/sims.php?sim=Motion_in_2D and click on Run Now. 1) Once the simulation opens‚ click on ‘Show Both’ for Velocity and Acceleration at the top of the page. Now click and drag the red ball around the screen. Make 3 observations about the blue and green arrows (also called vectors) as you drag the ball around. 1. The green line points in the direction that the ball is going to go 2. The blue line changes the
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