Write which statement is true in every number. 1.)Statement 1: Carbon dioxide is a polar molecule since it has a net dipole moment. Statement 2: Hydrogen bonding is exhibited by molecules with O, N or F atom.
Write which statement is true in every number.
1.)Statement 1: Carbon dioxide is a polar molecule since it has a net dipole moment.
Statement 2: Hydrogen bonding is exhibited by molecules with O, N or F atom.
2.) Statement 1: Separatory Funnel is an apparatus used in extraction, while Buchner Funnel is an apparatus used in filtration.
Statement 2: Measurement taken using Analytical balance is more precise than that of top loading balance.
3. )Statement 1: Polar molecules can exhibit van der Waals intermolecular forces.
Statement 2: Butanal can form hydrogen bond with another butanal molecule.
4. )Statement 1: In a paper chromatography that uses a cellulose-based filter paper as stationary phase and hexane as the mobile phase, non-polar compounds are expected to have higher Rf values than that of polar compounds.
Statement 2: In paper chromatography, the highly adsorbed compounds tend to outdistance the weakly adsorbed ones.
5.) Statement 1: In choosing a solvent for recrystallization, the solute must have high solubility in the solvent at high temperature but must have low solubility at room temperature
Statement 2: In choosing a solvent for recrystallization, the solute must have low solubility in the solvent at high temperature but must have high solubility at room temperature
6.) Statement 1: Given equal total volume of organic solvent, single extraction is more efficient than multiple extractions.
Statement 2: Given equal total volume of organic solvent, multiple extractions is more efficient than single extraction
7.) Statement 1: Sublimation refers to the phase transition in which matter changes state from a solid immediately into a gas, without passing through an intermediate liquid phase
Statement 2: The opposite process of sublimation is called solidification.
8.) Statement 1: In recrystallization, it is suitable to place the solution on an ice bath immediately after all the solute is dissolved in the solvent upon heating.
Statement 2: In recrystallization, you may add as much solvent as you want to the solute before heating
9.) Statement 1: Extraction is a technique used to separate compound/s of interest from the sample matrix or mixture.
Statement 2: The distribution coefficient is the ratio of the equilibrium volumes of the two solvents.
10.) Statement 1: In paper chromatography, the more soluble substances in the mobile phase will tend to outdistance the less soluble.
Statement 2: In paper chromatography, the less strongly adsorbed substances are held back while the more strongly adsorbed move on ahead of them
11.) Statement 1: Percent recovery can be calculated by dividing the mass of the product by the mass of the sample then multiplying by 100.
Statement 2: Percent yield can be calculated by dividing the theoretical yield by the actual yield and multiplying by 100.
12.) Statement 1: In the synthesis of aspirin, sulfuric acid serves as the catalyst to
Statement 2: In the synthesis of aspirin, salicylic acid and acetic anhydride are the starting materials, acetylsalicylic acid is the final product and acetic acid is the by-product.
13. )Statement 1: For compounds of approximately the same molecular weight, the stronger the intermolecular forces, the higher the boiling point.
Statement 2: For compounds of approximately the same molecular weight, the more symmetric the molecule is, the higher the melting point.
14.) Statement 1: Melting point and boiling point can be used to identify known compounds.
Statement 2: Melting point and boiling point can be used to assess the purity of a substance.
15.) Statement 1: Triple point is the temperature and pressure at which a substance undergo sublimation.
Statement 2: In general, a substance will only sublimate at temperatures and pressures lower than its critical point
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