Which among the following is pure matter ? 1). Carbondioxide 2). Brass 3). Air 4). Iron
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1. Which of these acids is not organic in origin?
2. Galvanization is the :
3. Wood spirit is
4. The major component in the LPG is
5. The most reactive among the halogens is
6. The material used in solar cells contains
7. Copper is refined by
8. Question 3.35:Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell?(a) Valence principal quantum number (n)(b) Nuclear charge (Z)(c) Nuclear mass(d) Number of core electrons.
9. The metal used to galvanise iron to protect it from rusting is
10. Vulcanization of rubber is carried out by adding
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