Four students P, Q, R and S noted the initial colour of the solutions kept in beakers I, II, III and IV. After inserting zinc rods in each solution and leaving them undisturbed for two hours, the colour of each solution was again noted in the form of table given below :
Which student noted the colour change in all the four beakers correctly?
the correct answer is not given because acc. to reactivity series only beaker 1 will have some change
Select the INCORRECT statement regarding shadow.
AShadow is formed when light cannot pass through an object.
BShadow is formed on the opposite side of the light source.
CShadow is of different sizes at different times of the day.
DLength of the shadow changes with the change in position of the Earth.
A group of students carried out an experiment to find out how the force applied to pull the toy car up the ramp varied with the height of the ramp as shown in the given diagram. They varied the height by changing the number of the blocks.
Which one of the following graphs best illustrates their results?
Rock X floats on water while rock Y wears easily when rubbed.
Which of the following options correctly identifies these rocks?
Which of the following statements is INCORRECT?
ABrain controls all the body parts through nerves.
BWhen we breathe in air, the lungs increase in size.
CSimilar cells join together to form organs.
DReproductive system of men is different from women.