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• The student first moves 1 km East. • After a 90° left turn, he moves 1 km North. • After another left turn, he moves 1 km West. Now, he is facing North from his original point of departure.
Which radioactive element is used in heart pacemakers?
What is the common name of sodium carbonate?
Bases react with acids to form ________.
Which of the following is correct regarding isobars?
I. They have different atomic numbers
II. The have same mass numbers
Adding which substance gives a blue color to glass?
What is the chemical name for baking soda?
The efficiency of a Carnot engine depends on:
Which one of the following is commonly used for pulp bleaching in the paper industry?
Which of the following cannot be cut by a knife?
Which acid is present in grapes?