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What will be the action of the following substances on litmus paper? Dry HCl gas, Moistened NH3 gas, Lemon juice, Carbonated soft drink, Curd, Soap solution.
- Dry HCl gas- No effect
- Moistened NH3 gas- Turns litmus paper to blue colour
- Lemon juice- Turns litmus paper to red colour
- Carbonated soft drink- Turns litmus paper to blue colour
- Curd- Turns litmus paper to red colour
- Soap solution- Turns litmus paper to blue colour
- Related Articles
- Why does dry HCl gas not change the colour of the dry litmus paper?
- Hold one moist and one dry strip of blue litmus paper over dry HCl acid gas. Which strip will turn red and why?
- (i) Draw a labelled diagram to show the preparation of hydrogen chloride gas in the laboratory.(ii) Test the gas evolved first with dry and then with wet litmus paper. In which of the two cases, does the litmus paper show change in colour?(iii) State the reason of exhibiting acidic character by dry HCl gas / HCl 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 :
- Michael prepares HCl gas in his school laboratory using certain chemicals. He puts both dry and wet blue litmus papers in contact with the gas.(i) Name the reagents used by Michael to prepare HCl gas. (ii) State the color changes observed with the dry and wet blue litmus paper. (iii) Show the formation of ions when HCl gas combines with water.
- Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over it, as shown in the figure.(a) What will be the action of gas on(i) dry litmus paper?(ii) moist litmus paper?Write a balanced chemical equation for the reaction taking place."\n
- Would the results of dry baking soda and solution of baking soda on dry litmus paper be same? Why?
- If we put litmus paper to soap solution will it change into the red?
- Pratyush took sulphur powder on a spatula and heated it. He collected the gas evolved by inverting a test tube over the burning sulphur.What will be the action of this gas on:Dry litmus paper?Moist litmus paper?Write a balanced chemical equation for the reaction taking place.
- Separate the following into substances having pH values above and below 7. How do these influence litmus paper?(i) Lemon juice (ii) Solution of washing soda (iii) Toothpaste (iv) Vinegar (v) Stomach juices
- 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?
- 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
- (a) What is produced if an acid is added to a base?(b) Why does dry HCl gas not change the colour of dry litmus paper?(c) What colour does phenolphthalein indicator turn when added to an alkali (such as sodium hydroxide)?
- When banking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. Explain.
- What change will you observe if you test soap with litmus paper (red and blue)?
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