Advertisements
Advertisements
प्रश्न
Define Acid.
Define the following term:
Acid
Advertisements
उत्तर
An acid is a compound which when dissolved in water produces hydronium ion(H3O+), the only positively charged
ion and a negative ion.
संबंधित प्रश्न
Tooth decay is caused by the presence of a base.
How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?
Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised?
What happens when zinc granules are heated with sodium hydroxide solution? Write the equation of the reaction which takes place.
What is the common name of water soluble bases?
Why is it wrong to treat a wasp sting with baking soda solution?
Write the neutralisation reaction between acids and bases in terms of the ions involved.
You are supplied with five solutions: A, B, C, D and E with pH values as follows: A = 1.8, B = 7, C = 8.5, D = 13, and E = 5
Classify these solutions as neutral, slightly or strongly acidic and slightly or strongly alkaline.
Which solution would be most likely to liberate hydrogen with magnesium powder. Give a word equation for each reaction.
Out of HCl and CH3COOH, which one is a weak acid and why? Describe an activity to support your answer.
Identify the following solutions, whether they are acid or base.
| Solution | Change in Indicator | Acid/Base | ||
| Litmus | Phenolphthalein | Methyl orange | ||
| 1. | -- | No change | -- | |
| 2. | -- | -- | Orange colour turns red | |
| 3. | Red litmus turns blue | -- | -- | |
Define an acid.
Choosing the correct words given in brackets, complete the sentence given below:
A(n) ______ (acid/basic) salt is one in which the hydrogen of an acid has been partially replaced by a ______ (metal/non-metal).
Solution A is strong acid B weak acid C strong alkali.
Which solution contains solute molecules in addition to water molecules?
Name the positive ion formed When an acid is dissolved in water.
Acids are bitter in taste.
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) Temperature of the solution decreases.
(ii) Temperature of the solution increases.
(iii) Temperature of the solution remains the same.
(iv) Salt formation takes place.
While playing in a park, a child was stung by a wasp. Some elders suggested applying paste of baking soda and others lemon juice as remedy. Which remedy do you think is appropriate and why?
______ contain one or more replaceable hydrogen atoms.
Complete the following equation.
Ca(OH)2 + ______ → ______ + H2O
Consider the acidity of the carboxylic acids:
(1) PhCOOH
(2) o-NO2C6H4COOH
(3) p-NO2C6H4COOH
(4) m-NO2C6H4COOH
