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Chemistry Quiz 8 (25 MCQs)

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1. What are polar covalent bonds?
2. Element X is a solid that is brittle, lacks luster, and has six valence electrons. In which group on the Periodic Table would element X be found.
3. In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statement is true for this chemical reaction?
4. What term is given to a reaction which transfers heat energy from the surroundings, to the system?
5. _____ refer to the body of knowledge.
6. A type of bond that gives 3-dimensional shapes to molecules like DNA
7. It is the properties that do not depend on the amount of the substance of the materials
8. For the Balanced Reaction:3 Mg + 1 Fe2O3 $\rightarrow$ 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
9. Which is also called Stranger Gas?
10. An atom of iodine has 7 valence electrons. What will an atom of iodine MOST likely do to be stable?
11. The ore which is found in abundance in India is
12. Bonds between atoms in a molecule form as a result of the sharing of?
13. Which biomolecule helps form muscles?
14. Building blocks of proteins
15. The octane number of zero is assigned to
16. Hydrogen and carbon form
17. Calcium carbonate or calcite consists of _____
18. Vertical columns of elements that have similar chemical and physical properties due to their outermost electrons
19. What is an electron cloud?
20. Which biomolecule includes fats, such as triglycerides, oils, waxes, and steroids (cholesterol); insoluble in water; provides energy storage, insulation, part of cell membrane, and hormones
21. Which is the strongest interaction?
22. Sharing electrons happens during
23. What are the number of moles of CO2 which contains 16 g of oxygen?
24. What is the chemical name of table salt?
25. What is the hardest form of carbon?
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