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ICSE Class 9 Answered

Each question has four options out of which only one option is correct. Write the correct option. (i) Choose the air pollutant which is non-acidic. (a) NO2 (b) SO2 (c) SO3 (d) Ozone (ii) Choose the odd one. (a) HCl (b) H2CO3 (c) HNO3 (d) H2SO4 (iii) On adding water to sodium, the solution formed is- (a) Neutral (b) Alkaline (c) Acidic (d) Amphoteric (iv) According to Boyle's law, as the pressure increases volume- (a) Increases (b) Decreases (c) Remains same (d) First increases and then decreases (V) In the element , 11 represents-   (a) Mass number (b) Atomic number (c) Number of neutrons (d) None of these
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer
(i) (d) Ozone
(ii) (a) HCl
(iii) (b) Alkaline
(iv) (b) Decrease
(v) (b) Atomic number
Answered by | 04 Jun, 2014, 03:23: PM

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