class 10 science chapter 6 mcq
28 Heliocentric theory was proposed by
1. Albert einstein
2. Robert clins
3. Copernicus
4. f.cojori
Click here to check your answer
27 The following one is used to measure liquids in laboratory
1. measuring cylinder
2. spring balance
3. buret
4. both 1 and 3
Click here to check your answer
26 ' Supersonics ' are
1. instruments
2. jet planes
3. missiles
4. none
Click here to check your answer
25 The following one is used to measure time in the laboratory
1. wall clock
2. time clock
3. wrist clock
4. stop clock
Click here to check your answer