Class10- Acids, Bases Class 10 - ACID , BASES- Chemistry Mock Test. This Test Consist of 20 QuestionsTotal Time - 20 -Minutes 1. 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 ? 2. 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 (i) and (iii) (i) and (iv) (ii) only (ii) and (iv) None 3. 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 (iv) (ii) and (iii) (i) and (iv) None 4. Many salts absorbs water from atmosphere. This property is called deliquescence None 5. Which of the following statements is correct about the analogous organ? The organs of which both structure and work are the same. The organs of which both structure and work are different. None of the these The organs whose work are the same but structure is different. None 6. What is a balanced chemical equation? The equation in which the number of atoms of the reactant is equal to the number of atoms of the product. The equation in which the number of reactants is equal to the number of products. The equation in which the size of the reactant is equal to the size of the product. The equation in which the number of the molecule is equal to the number of the product. None 7. To protect tooth decay, one is advised to brush the teeth regulary. The ingredient of the paste which checks tooth decay is: 8. If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done? Wash the hand with saline solution. Neutralise the acid with a strong alkali. Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate. After washing with plenty of water, apply solution of sodium hydroxide on the hand. None 9. Setting of Plaster of Paris takes place due to 10. 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? Acidic nature of the litmus paper Acidic nature of the liquid in the beaker Presence of a red pigment in the liquid Basic nature of the liquid None 11. Lime water reacts with chlorine to give 12. Payal is writing some statements, choose the correct statement ? All the Answers Methyl orange indicator gives red colour in acid solution, and yellow colour in basic solution. Sodium hydroxide solution turns red litmus to blue, so sodium hydroxide solution is basic in nature. Phenolphthalein indicator gives colourless in acid solution, and pink colour in basic solution. None 13. Sodium Hydrogen Carbonate, When added to acetic acid, evolves a gas. which of the following statements are true about the gas evolved ? 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. 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. None 14. Which of the following metal is not lustrous? Mercury Gallium Diamond Cesium None 15. 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) - (iii), (B) - (iv), (C) - (ii), (D) - (i) (A) - (iii), (B) - (ii), (C) - (iv), (D) - (i) (A) - (ii), (B) - (iv), (C) - (iii), (D) - (i) (A) - (ii), (B) - (i), (C) - (iv), (D) - (iii) None 16. In terms of acidic strength, which one of the following is in the correct increasing order? Water < Acetic acid < Hydrochloric acid Acetic acid < Water < Hydrochloric acid Hydrochloric acid < Water < Acetic acid Water < Hydrochloric acid < Acetic acid None 17. 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 the evolved gas absorb Cl– ions from the evolved gas None 18. 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, stronger the base. Higher the pH, stronger the acid, and Lower the pH, stronger the base. Higher the pH, stronger the acid, and Lower the pH, weaker the base. Higher the pH, weaker the acid, and Lower the pH, weaker the base. None 19. Which of the following metal is not reactive metal? Sodium Gold Aluminum Potassium None 20. 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 moisture from the gas. Moisten the gas. Absorb the evolved gas. Absorb Cl- ions from the evolved gas. None Time's upTime is Up! 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