HARD
10th Foundation
IMPORTANT
Earn 100
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 the table given below:
Which student noted the colour change in all the four beakers correctly?
50% studentsanswered this correctly
Important Questions on Chemical Reactions and Equations
MEDIUM
10th Foundation
IMPORTANT
Observe the given figure carefully. Which of the following observation(s) is/are correct?
I. A double decomposition reaction takes place.
II. Brown fumes of are evolved.
III. Red residue is left behind in the test tube.
MEDIUM
10th Foundation
IMPORTANT
Rupali, a class student has set up the apparatus as shown in the figures.
Which of the following observations is correct?
