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Permanent hardness of water is caused by the presence of soluble salts of chlorides and sulfates of calcium and magnesium. Unlike temporary hardness, which can be removed by boiling, permanent hardness remains unless treated with a chemical process.
Who has been appointed as the mentor for Women's Cricket Operations by the Andhra Cricket Association (ACA)?
Which country is known for inventing the game of Chess?
Match the following athletes with their respective sports:
  List-I (Players)  List-II (Associated Sports)
  (I) Manu Bhaker  Â...
Which cricketer holds the record for scoring the highest number of runs in a Test match innings?
Which type of bow is exclusively used in Olympic archery events?
Who was the first Indian woman to win an Olympic medal?
In which year were the first modern Olympic Games held?
Which country was the host of the first Asian Games?
Which participant was declared the overall champion of the fourth edition of the Khelo India Winter Games?
Which sport is associated with the term 'Penalty Corner'?