Trinitrotoluene is
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The common name of lead (II) sulphide is
The only non-metal which is liquid at room temperature is
The elements known as primary nutrients for plants
The cell walls of many organisms of Fungi kingdom are made of a tough complex sugar called ______.
If for a perfectly competitive firm, price is Rs. 60, output is 300 units, average variable costs are Rs. 18, and average total costs are Rs. 36. The firm's profits are equal to
Which of the following State is surrounded by Bangladesh from three sides?
What is the basis of first level of classification among plants?