You must know that – in acid blue Litmus changes to Red. Generally, litmus are indicators. And in basic solution red litmus changes to Blue.

We must know that – During the preparation of hydrogen chloride gas on a humid day, the role of calcium chloride (CaCl₂) taken in the guard tube is to absorb moisture from gas. This is because CaCl₂ is used gas ...

As velocity is constant, so it travels equal distance in equal interval of time. Hence, object is in uniform motion.

In case of linear or straight-line motion, the displacement of the object is equal to the distance covered.