English Medium Class 10 - CBSE Question Bank Solutions for Science

A few drops of ethanoic acid were added to solid sodium carbonate. The observation made was that ______.

A student while observing the properties of acetic acid would report that this smells like ______.

Vinegar is a solution of ______.

Ethanoic acid is also known as which of these?

Which of these is not an organic acid?

Ester is formed by the reaction between ______.

Which of the following substance produces brisk effervescence with baking soda solution?

When ethanoic acid is treated with NaHCO^ the gas evolved is ______.

Which of the following represents saponification reaction?

Anita added a drop each of diluted acetic acid and diluted hydrochloric acid on pH paper and compared the colors. Which of the following is the correct conclusion?

Shristi heated Ethanol with a compound A in presence of a few drops of concentrated sulphuric acid and observed a sweet smelling compound B is formed. When B is treated with sodium hydroxide it gives back Ethanol and a compound C.

1. Identify A and C
2. Give one use each of compounds A and B.
3. Write the chemical reactions involved and name the reactions.

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.

What happens when a small piece of sodium is dropped in ethanol? Write the equation for this reactions.

Why is glacial acetic acid called so?

Write an equation showing saponification.

Write the chemical equation for the following:

Esterification Reaction

Write the chemical equation for the following:

Saponification Reaction

Raina while doing certain reactions observed that heating of substance ‘X’ with a vinegar-like smell with a substance ‘Y’ (which is used as an industrial solvent.) in the presence of conc. Sulphuric acid in a water bath gives a sweet-smelling liquid ‘Z’ having molecular formula C₄H₈O₂. When heated with caustic soda (NaOH), ‘Z’ gives back the sodium salt and the compound ‘Y’.

Identify ‘X’, ‘Y’, and ‘Z’. Illustrate the changes with the help of suitable chemical equations.

A spatula full of sodium carbonate is taken in a test tube and 2 mL of dilute ethanoic acid is added to it.

Write a chemical equation for the reaction.

A spatula full of sodium carbonate is taken in a test tube and 2 mL of dilute ethanoic acid is added to it.

Suggest a method of testing the gas liberated in the reaction.