MCQ Class 10 Science Chapter 2 Acids, Bases & Salt Advertisement MCQ’s For All Chapters – Science Class 10th 1. What happens when a solution of an acid is mixed with a solution of a base in a test tube? (i) Temperature of the solution decreases (ii) Temperature of the solution increases (in) Temperature of the solution remains the same (iv) Salt formation takes place(i) and (iv)(i) and (iii)(ii) only(ii) and (iv)Question 1 of 172. When hydrogen chloride gas is prepared on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is tomoisten the gasabsorb Cl– ions from the evolved gasabsorb the evolved gasabsorb moisture from the gasQuestion 2 of 173. Which one of the following salts does not contain water of crystallization?GypsumWashing sodaBlue vitriolBaking sodaQuestion 3 of 174. In terms of acidic strength, which one of the following is in the correct increasing order?Water < Hydrochloric acid < Acetic acidHydrochloric acid < Water < Acetic acidWater < Acetic acid < Hydrochloric acidAcetic acid < Water < Hydrochloric acidQuestion 4 of 175. What is formed when zinc reacts with sodium hydroxide?Sodium zinc-oxide and hydrogen gasZinc hydroxide and sodiumSodium zincate and waterSodium zincate and hydrogen gasQuestion 5 of 176. Tomato is a natural source of which acid?Citric acidOxalic acidTartaric acidAcetic acidQuestion 6 of 177. Brine is an aqueous solution of sodium bicarbonateaqueous solution of sodium hydroxideaqueous solution of sodium chlorideaqueous solution of sodium carbonateQuestion 7 of 178. Na2CO3 . 10H2O isbleaching powdertartaric acidwashing sodabaking sodaQuestion 8 of 179. At what temperature is gypsum heated to form Plaster of Paris?110°C90°C120°C100°CQuestion 9 of 1710. How many water molecules does hydrated cal-cium sulphate contain?57102Question 10 of 1711. Sodium carbonate is a basic salt because it is a salt of aweak acid and weak baseweak acid and strong basestrong acid and weak basestrong acid and strong baseQuestion 11 of 1712. Which of the following statements is correct about an aqueous solution of an acid and of a base? (i) Higher the pH, stronger the acid (ii) Higher the pH, weaker the acid (in) Lower the pH, stronger the base (iv) Lower the pH, weaker the base(i) and (iii)(ii) and (iii)(i) and (iv)(ii) and (iv)Question 12 of 1713. Tooth enamel is made up ofpotassiumcalcium phosphatecalcium carbonatecalcium oxideQuestion 13 of 1714. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?Hydrochloric acidLimeAmmonium hydroxide solutionBaking powderQuestion 14 of 1715. When copper oxide and dilute hydrochloric acid react, colour changes toblackblue-blackwhitebluish-greenQuestion 15 of 1716. Sodium hydroxide turns phenolphthalein solutionorangepinkcolourlessyellowQuestion 16 of 1717. Chemical formula of washing soda isNa2C03 . 7H2ONa2C03 . 5H2ONa2C03 . 2H2ONa2C03 . 10H2OQuestion 17 of 17 Loading...
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