Trending Categories
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

A student placed a few drops of a liquid over a portion of the red litmus paper as shown here. He observed that the red litmus paper turned blue. The liquid could be :
(1) dilute hydrochloric acid (2) dilute sodium hydroxide
(3)water (4)dilute acetic acid
"

Correct answer: (2) dilute sodium hydroxide

Explanation: Litmus is an acid-base indicator. Acids turn blue litmus to red and bases turn red litmus to blue. As sodium hydroxide is a base, it will turn red litmus paper to blue.

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

30 Views

Related Articles
A drop of colourless liquid was placed on blue litmus paper. The litmus paper turned red. The liquid could be :(1)dilute hydrochloric acid(2)dilute sodium hydroxide solution(3) distilled water(4)sodium bicarbonate solution
The colour of the pH paper strip turned red when it was dipped into a sample. The sample could be:(1)dilute sodium bicarbonate solution(2)tap water(3) dilute sodium hydroxide solution(4) dilute hydrochloric acid
A student placed a pinch of solid sodium hydrogencarbonate on a strip of red litmus paper. He found that the colour of red litmus paper strip :
A student puts a drop of reaction mixture of a saponification reaction first a blue litmus paper and then on a red litmus paper. He may observe that:There is no change in the blue litmus paper and the red litmus paper turns white.There is no change in the red litmus paper and the blue litmus paper turns red.There is no change in the blue litmus paper and the red litmus paper turns blue.No change in colour is observed in both the litmus papers.
A student adds a few drops of the universal indicator to a solution of dilute hydrochloric acid in the way shown here. He would observe that the colour of the solution changes form colourless to:(1) red(2) yellow(3) violet(4) green"\n
Which of the following will be required to identify the gas evolved when dilute hydrochloric acid reacts with zinc metal?(a) Red litmus paper(b) pH paper(c) Lime water(d) A burning splinter
No observable change is noticed when dilute hydrochloric acid is added to :(1)sodium hydroxide solution(2)sodium carbonate solution(3) blue litmus solution(4) zinc metal
What do we observe on pouring acetic acid on red and blue litmus papers?(A) Red litmus remains red and blue litmus turns red.(B) Red litmus turns blue and blue litmus remains blue.(C) Red litmus turns blue and blue litmus turns red.(D) Red litmus becomes colourless and blue litmus remains blue.
Which of the following observations is true about dilute solution of acetic acid?(a) It smells like vinegar and turns red litmus blue.(b) It smells like onion and turns blue litmus blue.(c) It smells like orange and turns red litmus blue.(d) It smells like vinegar and turns blue litmus red.
How is the presence of an acid tested with a strip of red litmus paper?
When the strip of pH paper was put in a given solution, the pH paper changed to orange red. The given solution is most likely to be of :(1)sodium hydroxide(2) hydrochloric acid(3)sodium bicarbonate(4)ethanoic acid
A drop of a liquid sample was put on the pH paper. It was observed that the colour of the pH paper turned blue. The liquid sample islemon juicesodium bicarbonate solutiondistilled waterhydrochloric acid
What do you mean by Blue litmus paper and Red litmus paper?
Name the gas produced when aluminium foil reacts with:(a) dilute hydrochloric acid.(b) Sodium Hydroxide solution.
A student prepared hydrogen chloride gas by treating sodium chloride with concentrated sulphuric acid in a test-tube. He held a strip of dry blue litmus paper in HCl gas coming out of the test-tube. The student observed that on coming in contact with HCl gas, the colour of blue litmus paper :

Kickstart Your Career

Get certified by completing the course

Get Started

(1) dilute hydrochloric acid	(2) dilute sodium hydroxide
(3)water	(4)dilute acetic acid

(1) dilute hydrochloric acid	(2) dilute sodium hydroxide
(3)water	(4)dilute acetic acid

A student placed a few drops of a liquid over a portion of the red litmus paper as shown here. He observed that the red litmus paper turned blue. The liquid could be :(1) dilute hydrochloric acid (2) dilute sodium hydroxide(3)water(4)dilute acetic acid"

Kickstart Your Career

A student placed a few drops of a liquid over a portion of the red litmus paper as shown here. He observed that the red litmus paper turned blue. The liquid could be :
(1) dilute hydrochloric acid (2) dilute sodium hydroxide
(3)water (4)dilute acetic acid
"