Advertisements
Advertisements
प्रश्न
What is the common name of methanoic acid.
Advertisements
उत्तर
The common name of methanoic acid is formic acid.
APPEARS IN
संबंधित प्रश्न
A student puts a drop of reaction mixture of a saponification reaction first a blue litmus paper and then on a red litmus paper. He may observe that:
(a) There is no change in the blue litmus paper and the red litmus paper turns white.
(b) There is no change in the red litmus paper and the blue litmus paper turns red.
(c) There is no change in the blue litmus paper and the red litmus paper turns blue.
(d) No change in colour is observed in both the litmus papers
You have four test tubes, A, B, C and D containing sodium carbonate, sodium chloride, lime water and blue litmus solutions respectively. Out of these the material of which test tube/ test tubes would be suitable for the correct test of acetic/ethanoic acid?
(a) only A
(b) A and B
(c) B and C
(d) A and D
Choose the correct alternative and rewrite the following:
Acetic acid ..................
Three organic compounds A, B and C have the following molecular formulae: C4H10O
Which compound contains a carboxyl group? Write its name and structural formula.
How does ethanoic acid react with sodium hydrogen carbonate? Give equation of the reaction which takes place.
When ethanoic acid reacts with sodium hydrogen carbonate, then a salt X is formed and a gas Y is evolved. Name the salt X and gas. Y Describe an activity with the help of a labelled diagram of the apparatus used to prove that the evolved gas is the one which you have named. Also write the chemical equation of the reaction involved.
The substance which can produce brisk effervescence with baking soda solution is:
(a) ethanol
(b) vegetable oil
(c) vinegar
(d) soap solution(b) hydrocarbon ends directed towards the centre and ionic ends directed outwards
In a soap micelle, the soap molecules are arranged radially with the hydrocarbon ends, i.e. hydrophobic, directed towards the centre; and, ionic ends, i.e. hydrophilic, directed outwards.
Ethanol can be oxidized to ethanoic acid. Write the equation and name the oxidizing agent.
Name the substance used to change acetic acid to acetic anhydride?
What do you observe when acetic acid is added to sodium bicarbonate?
A student is studying the properties of acetic acid. List two physical properties of acetic acid he observes. What happens when he adds a pinch of sodium hydrogen carbonate to this acid? Write any two observations.
A student takes Na2CO3 powder in a test tube and pours some drops of acetic acid over it. He observes:
(A) no reaction in the test tube
(B) colourless gas with pungent smell
(C) bubbles of a colourless and odourless gas
(D) white fumes with smell of vinegar
On adding acetic acid to sodium hydrogen carbonate in a test tube, a student observes
(A) no reaction
(B) a colourless gas with pungent smell
(C) bubbles of a colourless and odourless gas
(D) a strong smell of vinegar
Name the first four members of alphatic carboxylic acid.
Fill in the blank with appropriate word/words.
Vinegar is a solution of about ________per cent ________in water.
State how the following conversion can be carried out:
Ethyl chloride to Ethene.
Give balanced chemical equations for the following conversion :
Ethanoic acid to ethyl ethanote
Identify the term or substance based on the descriptions given below:
Hydrocarbon containing a triple bond used for welding purposes
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.
Give the balanced chemical equation of the following reaction:
Neutralization of NaOH with ethanoic acid.
