Question: 6 - What happens when calcium is treated with water?
Answer: (d) (iii) and (iv)
Question: 7 - Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
Answer: (c) HNO3
Question: 8 - The composition of aqua-regia is
Answer: (c) Conc. HCl : Conc. HNO3 3 : 1
Question: 9 - Which of the following are not ionic compounds?
Answer: (b) (ii) and (iii)
Question: 10 - Which one of the following properties is not generally exhibited by ionic compounds?
Answer: (b) Electrical conductivity in solid state
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