What Do We Observe on Pouring Acetic Acid on Red and Blue Litmus Papers? - Science


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.



(A) Red litmus remains red and blue litmus turns red.

Acids turn blue litmus paper red. They have no effect on red litmus paper.

  Is there an error in this question or solution?
2014-2015 (March) All India Set 1

Video TutorialsVIEW ALL [2]


Dilute NaOH can be tested with
(a) red litmus paper
(b) blue litmus paper
(c) lime water
(d) Na2CO3

  Column A   Column B
i eosin 1 losing hydrogen
ii oxidation 2 synthetic indicator
    3 losing oxygen
    4 natural indicator


When phenolphthalein is added to NaOH, the colour of the solution will become _________.

  1. colourless
  2. red
  3. pink
  4. yellow

From which plant is litmus paper or litmus solution obtained?

  1. Moss
  2. Rose
  3. Hibiscus
  4. Lichen

When acids react with metal, which gas is liberated?

While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid?

The litmus paper or the litmus solution is obtained from ________ plant

(A) Moss

(B) Lichen

(C) Rose

(D) Hibiscus

 Complete and balance the followingchemicalequations:

NaHCO3 (S) + HCI (aq) →

What ions are present in the solutions of following substances? (write the symbols only)

Sodium hydroxide

What ions are present in the solutions of following substances? (write the symbols only)

Magnesium hydroxide


Phenolphthalein is a synthetic type of indicator.

Choose the correct alternative and rewrite the following sentence.

Phenolphthalein is ___________ type of indicator. 

When _______________ is passed through fresh lime water, it turns milky.

Answer the following question:
What is the universal indicator? Does Mg (OH)2 react with sodium hydroxide? If not, why?

Magnesium hydroxides are used for treating _______

Write any four physical properties of acids.

Acids turn blue litmus paper to ______.

What is a neutralization reaction? Give an example.

A student added 10 g of calcium carbonate in a rigid container, secured it tightly and started to heat it. After some time, an increase in pressure was observed, the pressure reading was then noted at intervals of 5 mins and plotted against time, in a graph as shown below. During which time interval did maximum decomposition take place?

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?

Which of the following substance will not give carbon dioxide on treatment with dilute acid?

In an attempt to demonstrate electrical conductivity through an electrolyte, the apparatus setup. Which among the following statement(s) is(are) correct?

  1. Bulb will not glow because electrolyte is not acidic
  2. Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
  3. Bulb will not glow because circuit is incomplete
  4. Bulb will not glow because it depends upon the type of electrolytic solution

What happens when nitric acid is added to egg shell? 

Acids present in fruits and vegetables are called ______ acids.

Vinegar is ______ in taste.

A salt may be ______.

Solutions of acids conduct ______.

Which acid is present in milk?

Are all acids corrosive in nature? Name a few acids which are non-corrosive and may be part of our food.

Copper or brass cooking vessels are coated with tin metal. Why?

Take a clean test tube with a holder and pour some dilute hydrochloric acid. Add a few pieces of magnesium ribbon pieces slowly. What do you observe? Now show a burning match stick near the mouth of the test tube. Do you hear any sound? The gas burns with a pop sound. From this, it is observed that hydrogen gas has been formed due to the reaction between acid and metal.

What is the correct procedure for mixing acid and water? Why?

“All acids contain one or more hydrogen atoms, but not all substances containing hydrogen are acids.” Support this statement with examples.

______ & ______ metals do not react with HCl or HNO3.

The formula of bleaching powder is  ______.

The taste of acid is ______.

Write notes on the properties of acids.

The metal that will not produce hydrogen gas when reacted with dilute acids.


      Forgot password?
Use app×