Which of the following is the most abundant metal on Earth's crust?
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Which of the following three R's are regarded as environment friendly?
Venus is the _______ planet from the Sun.
Chlorophyll was first isolated and named by
The method of soil conservation in which different crops are grown in alternate rows and are sown at different times to protect the soil from rain wash is called?
What is the name of the eighth planet discovered by NASA, circling Kepler- 90?
An _______________ is a sudden shaking or trembling of the earth.
Which among the following is the major cause of acid rain?