Download App

Carbon and its Compounds — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceCarbon and its Compounds3 Marks
Question
An ester has the molecular formula C4H8O2. Write its structural formula. What happens when this ester is heated in the presence of sodium hydroxide solution? Write the balanced chemical equation for the reaction and name the products. What is a saponification reaction?
✓

Answer


Esters in the presence of an acid or a base, give back alcohol and carboxylic acid as per the following reaction of the ester in the presence of sodium hydroxide solution.

$CH _3 COOC _2 H _5 \xrightarrow{ NaOH } \underset{\text { Ethanol }}{ C _2 H _5 OH }+\underset{\text { Ethanoic acid }}{ CH _3 COOH }$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the questions.[Che-3M]" from Carbon and its Compounds→Carbon and its Compounds — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

Give two important uses of washing soda and baking soda.
→
An organic compound ‘X’ on heating with cone. $\text{H}_{2}\text{SO}_{4}$ forms a compound ‘Y’ which on addition of one molecule of hydrogen in the presence of nickel forms a compound ‘Z’. One molecule of compound ‘Z’ on combustion forms two molecules $\text{CO}_{2}$ of  and three molecules of $\text{H}_{2}\text{O.}$ Identify giving reasons the compounds ‘X’, ‘Y’ and ‘Z’. Write the chemical equations for all the chemical reactions involved.
→
Hydrochloric acid reacts with a metal X to form a gas Y which bums with a ‘pop’ sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.
  1. Name X and Y.
  2. Write the chemical equation of the reaction of metal X with.
  1. Hydrochloric acid, and
  2. Sodium hydroxide solution.
→
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
→
What is the difference between skeletal equation and balanced chemical equation? Give example.
→
A cleaned aluminium foil was placed in an aqueous solution of zinc sulphate. When the aluminium foil was taken out of the zinc sulphate solution after 15 minutes, its surface was found to be coated with a silvery grey deposit. From the given observation, what can be concluded?
→
What happens when CO2 gas is passed through lime water?
→
Give the formulae of the chlorides of the elements X and Y having atomic numbers of 3 and 6 respectively. Will the properties of the two chlorides be similar or different? Explain your answer:
→
A hard material X which is mined from the earth is used as a house hold fuel and also for the generation of electricity at Thermal Power Stations. A soft material Y is also used us a fuel in the form of candles. A gaseous material Z which occurs along with petroleum is increasingly being used as a fuel in running vehicles in its compressed form.
  1. What are materials, X, Y and Z?
  2. When materials X, Y and Z are burned separately:
  1. When material burns by producing a yellow, luminous flame?
  2. Which material ultimately burns without producing a flame?
  3. Which material can burn in a gas stove by producing a blue flame?
→
A metal ‘X’ loses two electrons and a non-metal ‘Y’ gains one electron. Show the electron dot structure of compound formed between them. Is it ionic or covalent? Does it have high melting point or low? Will it conduct electricity in solid state or in aqueous solution and why? Will it be soluble in water?
→