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पासा पलटना - स्थिति उलट जाना, जोड़-तोड़ करना–दाँव-पेंच युक्त उपाय करना टस से मस न होना— विचलित न होना , ठिकाने लगाना-मार डालना
_____ is the movement of chemicals in the upper layers of soil into lower layers or into groundwater by being dissolved in water.
Which of the following is a water soluble vitamin?
What is the main ore of aluminum?
In which form is iron ore primarily found in nature?
Which one among the following fuels is used in gas welding?
What is the chemical name of baking soda?
Acid rain is caused due to pollution of the atmosphere by:
Naphthalene balls, commonly used as a pest repellent, are derived from which source?
What is the colour of the outer zone of complete combustion of candle flame?
Marble is a metamorphic rock of: