CBSE Class 10 Science 2020 · Paper 31/3/1 · Question 11
An aqueous solution ‘A’ turns phenolphthalein solution pink. On addition of an aqueous solution ‘B’ to ‘A’, the pink colour disappears. The following statement is true for solution ‘A’ and ‘B’.
- (a)A is strongly basic and B is a weak base.
- (b)A is strongly acidic and B is a weak acid.
- (c)A has pH greater than 7 and B has pH less than 7.
- (d)A has pH less than 7 and B has pH greater than 7.
Answer
(c) A has pH greater than 7 and B has pH less than 7.
🔒 Step-by-step solution
Sign up free to see every step of how it is worked out.
From the board papers
More questions from Acids, Bases and Salts
Class 10 Science — every question with an expert-verified, step-by-step solution.
- Q1 A solution turns red litmus blue, its pH is likely to be
- Q1 You have been provided with three test tubes. One of them contains…
- Q2 A solution reacts with crushed egg-shells to give a gas that tu…
- Q3 10 mL of a solution of NaOH is found to be completely neutralised b…
- Q4 Which one of the following types of medicines is used for trea…
- Q5 Write word equations and then balanced equations for the reaction t…
- Q6 Compounds such as alcohols and glucose also contain hydrogen bu…
- Q7 Why does distilled water not conduct electricity, whereas rain wat…
- Q8 Why does dry HCL gas not show acidic behaviour in the absence of…
- Q9 Five solutions A, B, C, D and E when tested with universal indicato…
- Q10 Equal lengths of magnesium ribbons are taken in test tubes A and B.…
- Q11 Fresh milk has a pH of 6. How do you think the pH will change as i…
All 352 questions on Acids, Bases and Salts → Browse all Science chapters →