PODAR INTERNATIONALSCHOOL (IB & CAIE) Affiliation No. IB - 002228 & Cambridge International - IN420 Academic Year: 2023-24 WORKSHEET NO 1 GRADE -9 Paper 42 THEORY Subject: CHEMISTRY Marks: 40 1 Hydrochloric acid is strong acid secreted in stomach a) Define the term acid ? ……………………………………………………………………………[1] b) What is strong acid ? …………………………………………………………………………………. ….………………………………………………………………………[2] c) State the pH value of a strong acid? …………………………………………………………………………[1] d ) Ammonia reacts with Hydrochloric acid forming a compound Give the name of the compound and write a balanced equation? Name ……………………………………………………………………….. Equation……………………………………………………………. [2] d) State two observation when Hydrochloric acid is added in excess to sodium carbonate powder and write word equation Observations ……………………………………………………… ……………………………………………………………..………[1] Word equation ….……………………………………………..……………………………… [1] 2) 3a b) C)i How is hydrogen obtained for above process? ………………………………………………………………………………………… ……………………………………………………………………………… [2] ii) What happens to the equilibrium and yield of product if high temperature is applied in Haber process which is an exothermic reaction? Explain ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… ……………………………………………….…………………………………[3] iv) How does high pressure and catalyst affect equilibrium and yield of product in Haber’s process ? Explanation not required ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… …………………………………………….…………………………………[3]
