Question

QUESTION 4 Give the classification of matter when two substances exist with two phases present. a. homogeneous mixture b. element c. compound d. heterogeneous mixture QUESTION 5 An example of a pure substance is a. pure water b.compounds c. all of these d. carbon dioxide e.elements QUESTION 6 Which of the following involves no chemical change? a. Boiling of water b. Burning of paper c. Lighting a matchstick d. Driving a car e. Baking a cake

Answer 1

4) substance Giue the classi ficatiom two mattir nen exist ith phaic present a) homogeneous Mixture b) ete ment c) compound heteropencaus xture Solution GementCampound hamogeneawmixture have and mixture phaye But hettrogencau Mxre One ofdiffercut phaue mixture A hetrogencous har pr partions thuphout the components in ohich vary Sample 5 Example substance is An purc a) purc wattY 6) Compound au 0thut Carbum ouOxide e) ecmont Compaund Solution caYban dioxlde And batty and are and substance Compound pare an 6чьstance element also purc he folwaing chemical change? 6) which involves nb aboling f wnter ) Burnng c)Lihting a) Driving раper Matchstick a Car Cae Boiling physi caf chang atr 3t is an Solution Physical chonge no Chemial Chanje 20 C wsr