A scientist took a metal rod and a wooden rod and wrapped each of them in a piece of paper. These were then heated as shown. It was found that the paper around the metal rod does not burn whereas the one around the wooden rod catches fire. It is because
AMetal being a good conductor, conducts away heat given to paper
BWood being an insulator, takes away all the heat
CCandle in case of iron rod, is near to the paper
DNone of these.
What is common among the following phenomena?
1. Planetary motion
2. Blinking of traffic lights
3. Motion of rotating fan blades
4. Swinging of a pendulum
AThey are all chemical changes.
BThey are all periodic changes.
CThey are all undesirable changes.
DThey are all physical changes.
Sandhya is taller than Anamika and shorter than Sanchi. Sanchi is shorter than only Monika. Who amongst them is the tallest and shortest respectively?
A Sandhya, Anamika
B Monika, Anamika
C Monika, Sanchi
D Sandhya, Sanchi
Pick the odd one out from each series
given below and select the correct option.
(i) Muga, Kosa, Cashmere, Tussar
(ii) Larva, Pupa, Silk moth, Tadpole
(iii) Patanwadi, Marwari, Pashmina, Lohi
Study the given figure and select the correct option regarding it.
A X represents bear.
B Y represents zebra.
C Z represents lion.
D All of these