Washing soda is used ______.
I. for removing permanent hardness of water
II. for disinfecting drinking water
III. as a cleaning agent for domestic purpose
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Elements having same atomic numbers but different mass number are called ______.
Which is the largest City of Nepal?
Who among the following writers won the 2017 Sahitya Academy Award for Hindi literature?
Which of the following countries has built the world's biggest air purifier, a 328 feet high tower, to combat air pollution?
Begum Akhtar is associated to which art form?
The highest mountain peak of Chhotanagpur Plateau is ________.
Which of the following pairs is NOT correctly matched?
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