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Which of the following is NOT an isotope of oxygen?
Which substance is also known as 'Oil of Vitriol'?
Hydrogen was discovered by:
A substance X turns the colour of red litmus blue, and it will change methyl orange-
The slow corrosion of iron in the presence of moist air is known as:
Which enzyme is derived from soybeans?
Milk tastes sour when kept in the open for sometimes due to the formation of-
Which of the following colour of white light has the maximum wavelength?
What is the molecular formula of chloroform?
Which of the following rock is not a sedimentary rock?
