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    				| 1. | ASSERTION AND REASON TYPE QUESTIONS:D ASSCrion and Reasonand Reason is rect explanation of SSCoch sertion and Reasons moet and Room is not correct explanation OLSE) Assortion is correct Reason is incorrectAssertion is incorrect Reason is corect18. A Silver get corrode to for black colour silver sulphide.R: Carrosion undergo oxidation.19 A Zane mens reacts with dil. HCl produce salt and hydrogen gas.R: Zine metal reacts with dil. HCl is a displacement reaction,20 A: FO3+2A141032F0R: Al is reducing agent21. Zime sulphate. ZnSO. Ammonium nitrate: -22. Gain of electron : Reduction :: --- ------ Oxidation23. Breakdown of reactant : decomposition double displacement:24. Breaking of Earthen pots Physical change #Growth of Plant :25. Respiration : Exothermic : Photosynthesis: ----- | 
| Answer» 18.b19.b20.c as it is clear from above see 21.(NH4)2NO22.loss of electron23.precipitation24.chemical25.endothermic if any doubt is there then plz comment | |