Which one of the following oxides of Nitrogen is also known as Laughing Gas?
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What is the fraction which, when taken away from 1/2, gives 2/3?
Which of the following is at the second trophic level of a food chain?
Which of the following is NOT based on principle of relationship between volume and pressure of air?
Which of the following is used to detect current in a circuit?
Which of the following technique is used to know the age of a tree in years?
Choose the pair which is related in the same way as the words in the first pair from the given choices.
PIGEON : PEACE :: WHITEFLAG : ____
Which acid is secreted by certain glandular cells in the stomach lining?