Q. The age of most ancient geological formations is estimated by

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Q. Who suggested that most of the mass of the atom is located in the nucleus?

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Q. The dark lines in the solar spectrum are due to

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Q. In an atomic nucleus, neutrons and protons are held together by

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Q. 'No two electrons in an atom can have the same set of four quantum numbers' is

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Q. According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .

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Q. Atoms of an element differ from those of all other elements in

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Q. Nuclear fission is caused by the impact of

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Q. Which of the following rays are more penetrating?

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Q. How many colours the sunlight spectrum has?

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Q. Which is/are the important raw material(s) required in cement industry?

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Q. Which type of fire extinguisher is used for petroleum fire?

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Q. Which of the following is commonly called a 'polyamide'?

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Q. Epoxy resins are used as

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Q. Detergents used for cleaning clothes and utensils contain?

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Q. Which of the following is used for removing air bubbles from glass during its manufacture?

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Q. Which of the following is a protein?

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Q. Wood is the main raw material for the manufacture of

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Q. Rayon is chemically

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Q. Optic fibres are mainly used for which of the following?

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