1) Asma lit a perfume stick in the corner of a room. When she stood at the other corner, she smelled the perfume after sometime. What can we conclude from this? a) Rooms produce perfume when a perfume stick is lit in a corner. b) All the air present in a room gives perfume. c) Perfumes do not spread from one place to another. d) All gases, including perfumes, have the property of spreading from one place to another. 2) Ramu dissolved some salt in water. He obtained salty water. What is the solute in this experiment? a) Salt b) Water c) Salty water d) All of these 3) Ramu dissolved some salt in water. He obtained salty water. What is the solvent in the salty solution? a) A) Salt b) B) Water c) C) Salty Water d) D) All of these 4) A student took an unknown substance into a beaker. The substance took the shape of the beaker. Later he transferred the substance into a measuring cylinder. The substance took the shape of the cylinder but its volume remained the same. What is the state of this substance? a) A) Solid b) B) Gas c) C) Liquid d) D) All 5)  Which of the following is wrong? a) When Solid is heated it changes into Liquid b) When Solid is cool it changes into Gas c) When Liquid is cool it changes into Solid d) When Liquid is heated it changes into Gas 6) The burning of fire needs a) oxygen. b) carbon dioxide. c) nitrogen. d) water vapour. 7) Which of the following is NOT true regarding the properties of air?   a) Air occupies space. b) Air exerts pressure. c) Air has no mass. d) Air cannot be seen. 8) When we blow air into a balloon it expands. What is the reason? a) A) Air is invisible. b) B) Air does not occupy space. c) C) Air has weight. d) D) Air exerts pressure. 9) A tight football is heavier than a loose football because air has a) weight b) shape c) none of these d) both 10) Exhaled air contains ________________ oxygen than inhaled air. a) less b) more c) none of these d) both

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