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ICSE Class X Sample / Model Paper 2020 : Chemistry : Periodic Classification of elements

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Priyanka Acharya
Shivaji University (SUK), Kolhapur
M.Sc. Microbiology
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ACHARYA CLASSES PERIODIC TABLE / 40 MKS/ 1.5 HRS Q1. Answer the following questions. [4, 5, 6--- 4 Mks each] [20] 1. An element A has At.No.14, to which period and group it will be placed in Modern periodic table? Justify. 2. Define Atomic size, Ionisation energy. 3. Define Atomic number. What is its significance? 4. Give reasons a] The size of anion is greater than the size of parent atom b] Argon atom is bigger than chlorine atom. 5. Explain why a] Alkali metals are good reducing agents b] Transition elements show colorful compounds. 6. Chlorine in periodic table is surrounded by the elements with At. No. 9, 16, 18 and 35. A] Which of these have physical chemical properties similar to Cl? B] Which is more electronegative than Cl? 7. Explain the position of Hydrogen in the periodic table. Q2. Answer the following. 1. Explain the gradation in Metallic and Non metallic character, Ionisation Potential, Electro Affinity, Electro negativity in the periodic table. [8] 2. Explain with an element At. No. 42--- how the position of element is determined? [3] 3. Compare the properties of Group 1 and Group 17 elements. [All properties] [9] [Occurrence, Physical state, valence electrons, Conductivity, M P and B P, I.E., E.A., Reactivity, Reaction with water, Reducing and Oxidising property ]

 

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