CHEM IGCSE HARD EXAM QUESTIONS
AND ANSWERS 100% SOLVED (Newest 2025) How to prepare a pure dry sample of lead - Correct Answers ✅-dissolve both items in water -Mix both -Filter it -Wash residue -dry on filter Why is the test tube placed with cold water and ice - Correct Answers ✅- to cool gas and condense it Redox reactions - Correct Answers ✅chemical reaction with oxidation and reduction processes why would something be ductile - Correct Answers ✅the layers of positive ions slide over each other Alkali metals reaction with water Lithium sodium potassium Rubidium and Caesium - Correct Answers ✅metal hydroxide+ hydrogen 1 / 2
CHEM IGCSE HARD EXAM QUESTIONS
AND ANSWERS 100% SOLVED (Newest 2025)
Lithium: h2 gas bubbles
Sodium" H2 gas bubbles, floats , melts, disappear
Potassium:Bubbles
melts into a shiny ball lilac flame produced
Rb and cb: explosive sparks
violent explosion
Alkali metals reaction with air - Correct Answers ✅Lithium:
burn with red flame
Sodium: burn with yellow
Potassium" burn with lilac reactions with oxygen magnesium hydrogen
sulphur - Correct Answers ✅mg: white flame
hydrogen: water
sulphur: blue flame
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