A student was given four unknown solutions in test-tubes marked A, B, C and D and asked to test them with universal indicator solution. He observed that on putting universal indicator solution, the solutions A, B, C and D turned blue, orange, green and red respectively. The test-tube which contains sodium chloride solution is :
(1) A
(2) B
(3) C
(4) D
Correct answer: (3) C
Explanation: NaCl is formed by the reaction of strong acid and strong base therefore, it is neutral and will show green colour with a universal indicator.
Related Articles
- A student was given an unknown solution in a test-tube. When he added universal indicator to the test-tube, the solution turned violet. The unknown solution is most likely to be:(1) baking soda solution (2) washing soda solution(3) caustic soda solution (4) household ammonia solution
- Which one of the following solutions would you use to test the pH of a given sample?(1)blue litmus solution(2)red litmus solution(3) universal indicator solution(4)mixture of red and blue litmus solution
- In an experiment to measure the pH values by using a universal indicator, a student found that the pH values of four given solutions A, B, C, and D are 10, 6, 2, and 14 respectively. The solution which will require the maximum volume of sodium hydroxide solution for complete neutralisation is solution :(1) A (2) B (3) C (4) D
- In an experiment to measure the pH values of solutions, a student placed strips of universal indicator paper in four beakers containing solutions A, B, C and D. The colour of universal indicator paper in these solutions is as shown below :The solution having lowest pH value is:(1) A(2) B(3) C(4)D"
- Solution A turns universal indicator blue to purple whereas solution B turns universal indicator orange to red.(a) What will be the action of solution A on litmus? (b) What will be action of solution B on litmus? (c) Name any two substances which can give solutions like A. (d) Name any two substances which can give solutions like B. (e) What sort of reaction takes place when solution A reacts with solution B?
- Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
- Two Solution X and Y are tested the universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?
- A student was asked to test an unknown colourless solution with an indicator. When he added a few drops of phenophthalein indicator, the solution turned pink. Which one of the following chemicals should be added in excess so as to obtain the colourless solution again?(1) HCI solution (2) NaOH solution (3) NH3 solution (4) NaCI solution
- Blue litmus solution is added to two test tubes A and B containing dilute HC1 and NaOH solution respectively. In which test tube a colour change will be observed? State the colour change and give its reason.
- Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are(a) red and blue(b) blue and red(c) pink and colourless(d) colourless and pink
- A student measured the pH values of four solutions A, B, C and D which were found to be 4, 1, 13 and 11 respectively. Which of the following statements are correct about these solutions?(a) A is strong acid and B is weak acid (b) B is strong acid and D is weak base (c) D is strong base and C is weak base (d) C is strong base and A is weak acid (1) (a) and (b) (2) (b) and (c) (3) (c) and (d) (4) (b) and (d)
- The colour of the precipitate formed when barium chloride solution is mixed with sodium sulphate solution is(a) blue(b) black(c) white (d) green.
- On adding a few drops of universal indicator solution to three unknown colourless solutions P, Q, and R taken separately in three test-tubes shown in the diagrams, a student observed the changes in colour as green in solution P, red solution Q and violet in solution R.The decreasing order of the pH of the three solution is :(1) P > Q > R(2) R > P > Q(3) Q > P > R (4) R > Q > P"
Kickstart Your Career
Get certified by completing the course
Get Started
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies