8. Calgon is used for water treatment. Which of the following statement is NOT true about Calgon? (a) It is also known as Graham's salt. (b) It is polymeric compound and is water soluble. (c) It doesn't remove Ca2+ ion by precipitation. 9. (d) Calgon contains the 2nd most abundant element by weight in the Earth's crust. 1 2 3 4 In CH2=C=CH-CH, molecule, the hybridization of carbon 1,2,3 and 4 respectively are: (a) sp, sp, sp, sp (d) sp, sp, sp, sp (b) sp, sp, sp, sp (c) sp, sp, sp, sp 10. Match List-I with List-II. List - I List - II (A) Sucrose (B) Lactose (C) Maltose (i) -D-Galactose and -D-Glucose (ii) -D-Glucose and -D-Fructose (iii) -D-Glucose and -D-Glucose Choose the correct answer from the options given below: (a) (A) (iii), (B) (ii), (C) (i) (b) (A)(i), (B) (iii), (C) (ii) (c) (A) (ii), (B) (i), (C) (iii) (d) (A) (iii), (B) (i), (C) (ii) 11. Given below are two statements one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In TI/3, isomorphous to Cs/3, the metal is present in +1 oxidation state. Reason R: T/ metal has fourteen f electrons in the electronic configuration. In the light of the above statements, choose the most appropriate answer from the options given below: (a) A is correct but R is not correct (b) Both A and R are correct but R is NOT the correct explanation of A (c) A is not correct but R is correct (d) Both A and R are correct and R is the correct explanation of A 12. The correct order of electron gain enthalpy is: (a) S > Se > Te > O (b) O > S > Se > Te (c) Te > Se > S > 0 (d) S>O>Se > Te