Why is the amount of gas collected in one of the test tubes in Activity 1.7 double of the amount collected in the other?
[question] Question. Why is the amount of gas collected in one of the test tubes in Activity $1.7$ double of the amount collected in the other? Name this gas. [/question] [solution] solution: Water $\left(\mathrm{H}_{2} \mathrm{O}\right)$ contains two parts hydrogen and one part oxygen. Therefore, the amount of hydrogen and oxygen produced during electrolysis of water is in a ratio of $2: 1$. During electrolysis, since hydrogen goes to one test tube and oxygen goes to another, the amount of gas ...
Read More →What are the characteristics of the particles of matter?
[question] Question. What are the characteristics of the particles of matter? [/question] [solution] Solution: The characteristics of the particles of matter are: (1) Particles have intermolecular space. (2) Particles have intermolecular force. (3) Particles of matter are moving continuously. [/solution]...
Read More →A conical pit of top diameter 3.5 m is 12 m deep.
[question] Question. A conical pit of top diameter $3.5 \mathrm{~m}$ is $12 \mathrm{~m}$ deep. What is its capacity in kilolitres? $\left[\right.$ Assume $\left.\pi=\frac{22}{7}\right]$ [solution] Solution: Radius $(r)$ of pit $=\left(\frac{3.5}{2}\right) \mathrm{m}=1.75 \mathrm{~m}$ Height $(h)$ of pit = Depth of pit $=12 \mathrm{~m}$ Volume of pit $=\frac{1}{3} \pi r^{2} h$ $=\left[\frac{1}{3} \times \frac{22}{7} \times(1.75)^{2} \times 12\right] \mathrm{cm}^{3}$ $=38.5 \mathrm{~m}^{3}$ Thus, ...
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