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Which one is not a non-conventional energy source?
River erosion is at its greatest where river’s:
What is the second most abundant element on Earth’s crust?
Which is the coldest among the following?
In predation between:
I. A lion and a deer
II. A snake and a frog
III. A lizard and an insect and
IV. An owl and a rat
Which predator will have greater control over its prey?
Which of the following is/are ‘rain cloud’?
1. Cirrus
2. Nimbostratus
3. Cumulonimbus
4. Altocumulus
A special type of well in which water rises automatically under the pressure of a column of water to the ground surface through a hole is known as:
Which one of the following is not the result of underground water action?
The highest grade and best quality coal is:
Pulsars are: