Advertisements
Advertisements
Question
| Column A | Column B | ||
| i | eosin | 1 | losing hydrogen |
| ii | oxidation | 2 | synthetic indicator |
| 3 | losing oxygen | ||
| 4 | natural indicator |
Advertisements
Solution
| Column A | Answers | ||
| i | eosin | 2 | synthetic indicator |
| ii | oxidation | 1 | losing hydrogen |
APPEARS IN
RELATED QUESTIONS
Dilute NaOH can be tested with
(a) red litmus paper
(b) blue litmus paper
(c) lime water
(d) Na2CO3
Complete and balance the following chemical equation:
\[\ce{Na2CO3_{(s)} + HCl_{(aq)} ->}\]
Complete and balance the following chemical equation:
\[\ce{NaOH_{(aq)} + HCl_{(aq)} ->}\]
Complete and balance the following chemical equation:
\[\ce{CuO_{(s)} + HCl_{(aq)} ->}\]
What happens when an acid reacts with a metal oxide? Explain with the help of an example. Write a balanced equation for the reaction involved.
What happens when an acid reacts with a metal carbonate? Explain with the help of an example. Write chemical equation of the reaction involved.
With the help of labelled diagrams, describe an activity to show that acids produce ions only in aqueous solutions.
A solution reacts with zinc granules to give a gas which burns with a ‘pop’ sound. The solution contains ______.
What ions are present in the solution of the following substance? (write the symbols only)
Potassium hydroxide
What ions are present in the solution of the following substance? (write the symbols only)
Magnesium hydroxide
State two uses of the following compound:
Hydrochloric acid
What are esters? How are esters prepared? Write the chemical equation for the reaction involved. What happens when an ester reacts with sodium hydroxide? Write the chemical equation for the reaction and also state the name and use of this reaction.
Write the chemical formula of washing soda. How can it be obtained from baking soda? List two industries in which washing soda is used for other purposes than washing clothes.
During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to ______
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
In an attempt to demonstrate electrical conductivity through an electrolyte, the apparatus setup. Which among the following statement(s) is(are) correct?
- Bulb will not glow because electrolyte is not acidic
- Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
- Bulb will not glow because circuit is incomplete
- Bulb will not glow because it depends upon the type of electrolytic solution
Two salts 'X' and 'Y' are dissolved in water separately. When phenolphthalein is added to these two solutions, the solution 'X' turns pink and the solution 'Y' does not show any change in colour, therefore 'X' and 'Y' are:
A substance 'X' is used as a building material and is insoluble in water. When it reacts with dil. HCl, it produces a gas which turns lime water milky.
- Write the chemical name and formula of 'X'.
- Write chemical equations for the chemical reactions involved in the above statements.
The metal that will not produce hydrogen gas when reacted with dilute acids.
