The diagram shows a ray PQR travelling through a glass slab. Which option in the table gives the correct name for all three rays?
|A||Incident ray||Emergent ray||Refracted ray|
|B||Incident ray||Refracted ray||Emergent ray|
|C||Emergent ray||Incident ray||Refracted ray|
|D||Emergent ray||Refracted ray||Incident ray|
The given table shows six objects sorted into two groups X and Y.
Which of the following tables shows objects that can be categorised into the two groups X and Y?
Which of the following statements is/are correct?
I. Larger solid particles can be separated from smaller ones by filtration.
II. Cream can be separated from milk by churning.
III. A mixture of mud and water can be separated by loading, sedimentation and decantation.
IV. Grains can be separated from stalks by threshing.
A I and II only
B II and IV only
C I, II and III only
D II, III and IV only
Study the distance-time graph of a toy car given here and choose the incorrect statement from the following.
A The toy car is fastest during first 10 seconds.
B The toy car is slowest in between 10 and 20 seconds.
C Distance travelled during last 10 seconds is 3 m.
D Total distance covered by the toy car is 10 m.
why the answer cannot be A? how total distance covered by car is 10? it is 13m.
The bumpers and door handles of motor cars, taps etc. are coated with silvery layer of chromium because
(i) It does not easily get corroded.
(ii) It forms a hard layer which does not easily get scratched.
(iii) It tarnishes quickly.
(iv) It is cheap.
Which of the following options is correctly identifies true (T) or false (F)?
it is wrongshould be b