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The conversion of hard water into soft water by boiling or adding calcium hydroxide is called:
Activated charcoal is used to remove colouring matter from pure substances by which of the following process?
Perspiration cools the body because
The orbital velocity of a satellite depends on:
Which of the following is the lightest metal?
Which reaction represents the correct method of extracting iron from its ore in a blast furnace?
Which gas is used to convert vegetable oils into solid fats?
What happens when one s orbital and one p orbital hybridize?
Which type of bond is formed by the sharing of electrons?
Turquoise is an ore/mineral of:
