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Chemistry (CY) 2009 GATE Paper without solution | GATE Chemistry Mock Test Series PDF Download

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1. What is the structure of an atom?
Ans. An atom is composed of a nucleus, which contains protons and neutrons, surrounded by electrons in energy levels or shells.
2. What are the different types of chemical bonds?
Ans. The three main types of chemical bonds are ionic bonds, covalent bonds, and metallic bonds. Ionic bonds involve the transfer of electrons, covalent bonds involve the sharing of electrons, and metallic bonds involve a sea of delocalized electrons.
3. How do chemical reactions occur?
Ans. Chemical reactions occur when there is a rearrangement of atoms in the reactants to form new substances, known as products. This rearrangement is driven by the breaking and formation of chemical bonds.
4. What is the difference between an exothermic and endothermic reaction?
Ans. An exothermic reaction releases heat to the surroundings, resulting in an increase in temperature. On the other hand, an endothermic reaction absorbs heat from the surroundings, causing a decrease in temperature.
5. How does the periodic table organize elements?
Ans. The periodic table organizes elements based on their atomic number, which represents the number of protons in an atom's nucleus. Elements are arranged in periods and groups, with similar properties being found within the same group.
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