Question

ph related prctical questions for class 10 ncert​

Answer 1

Given below are some very important practical based questions to prepare for CBSE class 10 Science exam:

1. A student adds a spoon full of powdered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations that he/she must note in his/her notebook about the reaction that takes place. Also, write chemical equation for the reaction

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Answer 2

Answer:

Graphs are used to represent the relation between two physical quantities. When a body is at rest, the distance-time graph is a straight line parallel to time axis. When the body is.in uniform motion, the distance-time graph is a straight line inclined to time axis. The slope of a distance-

time graph gives speed, A velocity-time graph is a straight line parallel to time axis for a body moving with uniform velocity. When the velocity changes by equal amounts in equal intervals of time then the velocity-time graph is a straight line inclined to time axis. The slope of the velocity-time graph gives acceleration. When a body is moving with variable acceleration then the velocity-time graph is a curved line.