English Medium Class 10 - CBSE Question Bank Solutions for Science

The salt which will give a neutral solution on dissolving in water will be ______.

What type of ions are formed?

When a base (or alkali) is dissolved in water.

Write the balanced equation for the following chemical reaction.

\[\ce{Barium chloride + Aluminium sulphate -> Barium sulphate + Aluminium chloride}\]

Dry raisins were soaked in water for 2 hours, to determine the percentage of water absorbed by raisins. Before final weighing of swollen raisins, the extra water left on the surface of soaked raisins was removed by:

While performing the experiment with raisins to determine the percentage of water absorbed by them, a student made following measurements:

Mass of water in the beaker = 40 g

Mass of raisins before soaking = 5 g

Mass of raisins after soaking for 2 hours = 8 g

Mass of water left in the beaker after the experiment = 35 g

The percentage of water absorbed by raisins is:

Complete the following equation:
CH₄ + O₂ —>

Complete the following equation:

CH₂ + H₅OH `("Hot Conc." H_2SO_4)/`>

Complete the following equation:

CH₃COOH + NaOH → 

A student weighed some raisins and recorded the weight as ‘x’. She then soaked the raisins in distilled water. After about 2 hours she removed the raisins, wiped them dry and weighed them again, and recorded that as ‘y’. The percentage of water absorbed by raisins may be determined using the relationship.

In the experiment for determining the percentage of water absorbed by raisins, we do the final weighing of the raisins after keeping them dipped in water for about one hour. For the accuracy of the result, the extra water from the surface of the soaked raisins is removed by

Out of HCl and CH₃COOH, which one is a weak acid and why? Describe an activity to support your answer.

To determine the percentage of water absorbed by raisins, raisins are soaked in water for: 

Raisins are wiped off gently before final weighing with the help of

The step(s) necessary for determining the percentage of water absorbed by raisins is/are:

In electrolysis of water, why is the volume of gas collected over one electrode double that of gas collected over the other electrode?

Show the formation of Na2O by the transfer of electrons. 

Out of three metals P, Q and R, P is less reactive than Q and R is more reactive than P and Q both. Suggest an activity to arragne P, Q and R in order of their decreasing reactivity. 

Identify the type of reaction taking place of the following case and write the balanced chemical equation of the reaction:
Zinc reacts with silver nitrate to produce zinc nitrate and silver.