Advertisements
Advertisements
प्रश्न
When zinc powder is added to acetic acid ______________
(a) the mixture becomes warm
(b) a gas is evolved
(c) the colour of the mixture becomes yellow
(d) a solid settles at the bottom
Advertisements
उत्तर
A gas is evolved.
Zn + 2CH3COOH → Zn (CH3COO)2 + H2
APPEARS IN
संबंधित प्रश्न
While studying saponification reaction for the preparation of soap, a teacher suggested to a student to add a small quantity of common salt to the reaction mixture. The function of common salt in this reaction is to
(A) reduce the alkalinity of the soap
(B) reduce the acidity of the soap
(C) enhance the cleansing capacity of soap
(D) favour precipitation of soap
A gas is liberated immediately with a brisk effervescence, when you add acetic acid to sodium hydrogen carbonate powder in a test tube. Name the gas and describe the test that confirms the identity of the gas.
Choose the correct alternative and rewrite the following:
Acetic acid ..................
Why is the conversion of ethanol into ethanoic acid an oxidation reaction?
The organic acid present in vinegar is ______.
What happens when ethanoic acid reacts with sodium hydroxide? Write equation of the reaction involved.
Name the product formed and give the appropriate chemical equation for the following:
Sodium reacting with ethyl alcohol.
What do you notice when acetic acid reacts with metals?
Name the functional group present in the following compound:
C2H5CHO
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 red
(C) It smells like orange and turns red litmus blue
(D) It smells like vinegar and turns blue litmus red
Write a balanced chemical equation for the following:
Monochloroethane is hydrolysed with aqueous KOH.
Give a balanced chemical equation for the following conversion:
Calcium carbide to ethyne.
A compound X when treated with an organic acid Y (having vinegar-like smell) in the presence of the acid Z, forms a compound P which has a fruity smell.
- Identify X, Y and Z
- Write the structural formula of X and Y.
- What type of compound is P?
- Name the above reaction.
- If compounds X and Y both have 2 carbon atoms. Write the reaction.
Explain the following reaction with an example.
Esterification
Explain the following reaction with an example.
Saponification
Mineral acids are stronger acids than carboxylic acids because
- mineral acids are completely ionised
- carboxylic acids are completely ionised
- mineral acids are partially ionised
- carboxylic acids are partially ionised
The reaction between acetic acid and sodium carbonate is shown in the following figure.
Answer the questions with the help of a diagram.
- Which gas does come out as effervescence in the big test tube?
- What is the colour change in the lime water present in the small test tube?
- Write the related reaction.
Reshu by mistake forgot to label the two test tubes containing Ethanol and Ethanoic acid. Suggest an experiment to identify the substances correctly? Illustrate the reactions with the help of chemical equations.
Write an equation showing saponification.
