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Multiple Choice Questions 1. Which of the f ollowing is n ot a physical ch ange ? (a) Boilin g of w ate r to g ive wate r vapour (b) Me lti ng o f ice to g ive wate r ( c) Dissolution of sa lt in wate r (d) Combusti on o f Liquefie d Pe troleum Gas ( LP G) 2.  The fo llowing react ion is an e xa mple of a 4NH 3 (g) + 5O 2 ( g ) 4NO(g) + 6H 2 O(g) ( i) displ acement reac tion ( ii ) co mbination rea ction ( iii ) re do x react ion (iv) neutralisation reaction (a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (iii) (d) (iii) and (iv) 3. Which of the fo llowing statements about the give n re action are correct? 3Fe(s) + 4H 2 O(g) Fe 3 O 4 (s) + 4H 2 ( g ) ( i) Ir on me tal is ge tting o xidised (ii) Wate r is ge tting re duced ( ii i) Wate r is acting as re duci ng age nt ( iv) Wa te r i s acting as ox idisin g agent ( a) ( i) , ( ii) and ( iii) ( b) ( iii) and ( iv ) ( c) ( i) , ( ii) and ( iv ) ( d) ( ii) and ( iv ) 4. Which of the following are exothermic processes? (i) Reaction of wa te r with quick l ime (ii) Dilu tio n o f an acid (iii) E v apo ration of water (iv) Sublimation of camphor (c rysta ls) ( a) ( i) and ( i i) ( b) ( ii ) and ( iii ) ( c) ( i ) and ( i v ) ( d) ( iii ) and ( iv ) Ch e m i cal R e act i ons a n d Equat i o ns 1 CHAPTER

Class 10 Exemplar Chapter 1

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