Anil Ahlawat Solutions for Chapter: Metals and Non-Metals, Exercise 1: EXERCISES

Mr. Ramakant, a science teacher organised a quiz in the class. He stated few applications of non-metals and asked students to guess the names of the non-metals. Mark the correct option.

Read the given passage and fill in the blanks by selecting an appropriate option. Non-metals find wide applications in industries. For example i is used in electrodes, ii is used in welding metals, iii is used to make antiseptic creams while iv is used as a preservative due to its inert nature.

The oxide of sulphur (which can be further oxidised), when dissolved in water gives:

Study the given table carefully and select the appropriate option.

Observe the given figure carefully.

$\mathrm{X}$ and $\mathrm{Y}$ respectively are

Aditya, a class $8$ student investigated the reactivity of four metals, iron, copper, zinc and an unknown metal $\mathrm{X}$. He arranged three experimental set-ups as shown in the diagram and observed the changes carefully.

If reactions occur in all three beakers then the metal $\mathrm{X}$ is

Each beaker contains two metal strips of same size fastened together and immersed in hydrochloric acid. After $5$ minutes, which beaker will contain the least amount of zinc ions?

Fill in the blanks with the most appropriate option.
'$\mathrm{W}$' is a very reactive metal, reacts vigorously with oxygen and water therefore, stored in $\underset{¯}{\left(1\right)}$.
'$\mathrm{X}$' is a non-metal, soft and dull and forms $\underset{¯}{\left(2\right)}$ oxides with oxygen.
'$\mathrm{Y}$' is very reactive $\underset{¯}{\left(3\right)}$, catches fire if exposed to air, therefore, stored in water.
'$\mathrm{Z}$' does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric acid. When it is exposed to moist air for long, it acquires a dull $\underline{\left(4\right)}$ coating.