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MDCAT Chemistry Chapter 1 Introduction to fundamental concepts of chemistry Online Test
| Sr. # | Questions | Answers Choice |
|---|---|---|
| 1 | 5604 cm3 of H2 gas at STP contains atoms of hydrogen | 6.02×10 (23) 2.6x10(22) 3.01x10(23) 1. 50x 10(23) |
| 2 | Mg(s) + 2HCI(aq). ------------ MgCl2(aq)+ H2(g) Given that; Mg=21g and HCI=21g, the excess reactant is |
Mg HCI Both are in stoichiometric amounts None of these |
| 3 | One mole of SO2 contains | 6.022 x 10(23) atoms of oxygen 6.022x 10 ê23 atoms of sulfur 18.1x 10 (23) molecules of SO2 4 g molecule of SO2 |
| 4 | How many electrons have to be removed to ionize 1.0 x 10(-6) moles of Ne atoms to Ne+ ions in a neon advertising tube: | 6.02x10ê23/1.0x10ê-6 1.0x 10ê-6 x 6.02x 10ê23 1.0x10ê-6 x 6.02×10ê23/20.2 1.0x10ê-6 x 6.02x10ê23/9.65x10ê-1 |
| 5 | 1 gram formula refers to | Amount in grams equivalent to 1 mole of a atom Amount in grams equivalent to 1 mole of a covalent compound Amount in grams equivalent to 1 mole of a ionic compound Amount in grams equivalent to 1 mole of an ion |
| 6 | Number of H+ ions when 0.1 mole of sulfuric acid is completely ionized in water | 4x6.022x10ê23 1×6.022x10ê23 2x6.022 x10ê23 2x6.022x10ê22 |
| 7 | 1 gram molecule refers to amount in grams | Equivalent to 1 mole of an atom Equivalent to 1 mole of a molecule Equivalent to 1 mole of an ionic species Of an ionic compound |
| 8 | The stoichiometric calculations for a chemical reaction results in | Actual yield Percentage yield Theoretical yield Selectivity |
| 9 | Mass spectrometry is used to determine the | Number of isotopes of an element Relative abundance of isotopes Relative isotopic masses All of these |
