Class10- Acids, Bases Class 10 - ACID , BASES- Chemistry Mock Test. This Test Consist of 20 QuestionsTotal Time - 20 -Minutes 1. Sodium Hydrogen Carbonate, When added to acetic acid, evolves a gas. which of the following statements are true about the gas evolved ? It extinguishes a burning splinter, it dissolves in a solution of sodium hydroxide, and it has a pungent odour. It turns lime water milky, and it has a pungent odour. It turns lime water milky, and it extinguishes a burning splinter. It turns lime water milky, and it extinguishes a burning splinter, and it dissolves in a solution of sodium hydroxide. None 2. In the table given below, match the bases in the first column with their applications mentioned in the second column.(A) Calcium hydroxide(i) Antacid(B) Ammonium hydroxide(ii) Soap(C) Sodium hydroxide(iii) Whitewash(D) Magnesium hydroxide(iv) Window cleaner (A) - (ii), (B) - (i), (C) - (iv), (D) - (iii) (A) - (iii), (B) - (ii), (C) - (iv), (D) - (i) (A) - (iii), (B) - (iv), (C) - (ii), (D) - (i) (A) - (ii), (B) - (iv), (C) - (iii), (D) - (i) None 3. Setting of Plaster of Paris takes place due to 4. To protect tooth decay, one is advised to brush the teeth regulary. The ingredient of the paste which checks tooth decay is: 5. If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done? After washing with plenty of water, apply solution of sodium hydroxide on the hand. Wash the hand with saline solution. Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate. Neutralise the acid with a strong alkali. None 6. Many salts absorbs water from atmosphere. This property is called deliquescence None 7. Which of the following metal is not lustrous? Cesium Gallium Mercury Diamond None 8. 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 to ? absorb moisture from the gas moisten the gas absorb Cl– ions from the evolved gas absorb the evolved gas None 9. Which of the following metal is not reactive metal? Sodium Aluminum Gold Potassium None 10. Lime water reacts with chlorine to give 11. Equal volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained ? 12. 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 (ii) and (iv) (ii) and (iii) (i) and (iii) (i) and (iv) None 13. Which of the following statements is correct about an aqueous solution of an acid and a base ? Higher the pH, weaker the acid, and Lower the pH, weaker the base. Higher the pH, stronger the acid, and Lower the pH, stronger the base. Higher the pH, weaker the acid, and Lower the pH, stronger the base. Higher the pH, stronger the acid, and Lower the pH, weaker the base. None 14. During the preparations of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. the role of the calcium chloride taken in the guard tube is to ? Absorb Cl- ions from the evolved gas. Absorb the evolved gas. Absorb moisture from the gas. Moisten the gas. None 15. Which of the following statements is correct about the analogous organ? The organs whose work are the same but structure is different. The organs of which both structure and work are different. None of the these The organs of which both structure and work are the same. None 16. Payal is writing some statements, choose the correct statement ? Methyl orange indicator gives red colour in acid solution, and yellow colour in basic solution. Phenolphthalein indicator gives colourless in acid solution, and pink colour in basic solution. All the Answers Sodium hydroxide solution turns red litmus to blue, so sodium hydroxide solution is basic in nature. None 17. 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(iii) Temperature of the solution remains the same(iv) Salt formation takes place (ii) and (iv) (i) and (iii) (i) and (iv) (ii) only None 18. In terms of acidic strength, which one of the following is in the correct increasing order? Water < Hydrochloric acid < Acetic acid Water < Acetic acid < Hydrochloric acid Acetic acid < Water < Hydrochloric acid Hydrochloric acid < Water < Acetic acid None 19. What is a balanced chemical equation? The equation in which the number of reactants is equal to the number of products. The equation in which the number of the molecule is equal to the number of the product. The equation in which the size of the reactant is equal to the size of the product. The equation in which the number of atoms of the reactant is equal to the number of atoms of the product. None 20. A student has dipped blue litmus paper into a beaker containing a liquid. Its colour turned red. Which of the following is responsible for this change? Basic nature of the liquid Presence of a red pigment in the liquid Acidic nature of the litmus paper Acidic nature of the liquid in the beaker None Time's upTime is Up! 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