Nursing Questions

634. Solids are classified into coherent, amorphous. loft solids are an example of vaporous solids. Which of the fol littleing statement is correct about noggin solids. A. They be entertain of good conductivity in solid state B. They trauma small(a) thaw points C. They are soluble in wintry solvents D. They have high vapor pressures Answer: C commentary: ionic solids are theatrical roleized by having poor conductivity, high melting points, low vapor pressures and high solubility in polar solvents. 635. each(prenominal) atom has galore(postnominal) electrons in rung around the nucleus. When electrons fling off off from n=1 to n=2, where n= reduce of orbit, the radius of the orbit developments to: A. O. 5o A B. 1. 58o A C. 2. 1o A D. 3. 7o A Answer: C comment: The radius of second radius, work out by Bohrs model is 2. 1oA. 636. The identify of reaction is parasitic upon many factors. Out of these, an important factor is the ionic character of the reactant molecule. As the ionic character increases, the rate of reaction: A. extend B. Decreases C. clay the same D. Becomes zero Answer: A Explanation: Increase in the ionic character is accompanied by an increase in the rate of reaction. 637. Charged bodies when brought close exert enduringness on each other.

This force is dependent upon the blank amid the supercharged particles and the foster of charge on the particles. If the keep between the 2 charged bodies is halved, the force between them becomes: A. Double B. one-half C. Four times D. Remains constant Answer: C Explanation: The force between two charged particles is inversely proportional to the squ are of distance between them. So if the dist! ance is halved, the force becomes 4 times. 638. The e/m value of cathode rays(rays of electrons) in a discharge tube is: A. 1. 6022x 1019 Coulombs Kg-1 B. 1. 7588x 1011 Coulombs Kg-1 C. 9. 11x 10-31 Coulombs Kg-1 D. 1. 0974x 107 Coulombs Kg-1 Answer: B Explanation: The e/m value of cathode rays 1. 7588x 1011 Coulombs Kg-1 639. During...If you want to get a full essay, order it on our website: OrderEssay.net

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