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1) Compounds have atoms of a. same sizes b. different sizes c. same electrons d. different electrons
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2) An oxide ion has -2 charge because a. oxygen looses two electrons b. oxygen gains two electrons c. oxygen becomes neutral d. oxygen gains 3 electrons
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3) Which of the following is present in vinegar? a. 10% acetic acid b. 5%acetic acid c. 7% acetic acid d. 8% acetic acid
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4) The molecular formula gives a. simplest ratio of atoms b. actual whole number ratio of atoms c. whole number ratio of atoms d. natural number ratio of atoms
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5) 6.022 * 10²³ atoms of Sulphur contains a. 2 moles b. 3 moles c. 4 moles d. 1 mole
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6) An ionic compound is electrically a. neutral b. positively charged c. negatively charged d. none of above
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7) Gram molecular mass of C6H12O6 is a. 18.016g b. 180.096g c. 58.5g d. 70g
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8) In glucose the simplest ratio between C, H and O is a. 0.0840625 b. 0.126400462962963 c. 0.0430671296296296 d. 0.127789351851852
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9) The formula mass of NaCl is a. 57.5 amu b. 58.5 amu c. 59.5 amu d. 60.0 amu
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10) Species present in a substance refers to a. atoms b. ions c. molecules d. representative particles
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