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Shri Vile Parle Kelavani Mandal s C.N.M. School & N.D. Parekh Pre-Primary School MUST KNOW QUESTIONS (2016-17) CHEMISTRY I. PERIODIC PROPERTIES AND VARIATIONS OF PROPERTIES 1) Define -Ionization potential 2) Differentiate between electron affinity and electronegativity. 3) Give reason: A cation is smaller in size than its parental atom. 4) Complete the following table by filling the word INCREASE or DECREASE Periodic property Across a period from left to right Down the group from top to bottom 1. Atomic size 2. Ionization potential 3. Electro affinity 4. Electro negativity 5. Metallic character II. CHEMICAL BONDING 1) Explain why polar covalent compounds can conduct electricity in their aqueous state. 2) Draw electron dot structures of hydronium & ammonium ion. Label the lone pair of electrons. 3) Differentiate between sodium chloride and carbon tetra chloride on the basis of following points. (i) Type of bonding (ii) Dissociation in solution (iii) Conductivity 10-chemistry Page 1
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