Химия для вступительных экзаменов на сестринские программы: лист заданий с ответами

A food Calorie (written with a capital C) equals which amount of energy?

1. A1 calorie
2. B1 kilojoule (1000 J)
3. C1 kilocalorie
4. D1 joule

What are the usual units of molar mass?

1. Ag/mol
2. Bmol/g
3. Cg/L
4. Dmol/L

Which acid is found in the stomach?

1. AHydrochloric acid
2. BSulfuric acid
3. CNitric acid
4. DAcetic acid

Which reacts more vigorously with water, potassium or sodium?

1. ASodium, because it has fewer electron shells to shield its electron
2. BSodium, because its outer electron is farther from the nucleus
3. CThey react equally, because both are in group 1
4. DPotassium, because its outer electron is farther from the nucleus

What are isomers?

1. ACompounds with the same molecular formula but different structures
2. BCompounds with the same structure but different molecular formulas
3. CMolecules that contain the same number of bonds
4. DAtoms of the same element with different numbers of neutrons

What is 380 mmHg in atmospheres?

1. A0,38 atm
2. B2 atm
3. C0,5 atm
4. D380 atm

Which list puts 0,1 M solutions of HCl, acetic acid (CH₃COOH) and NaCl in order of increasing pH?

1. ACH₃COOH < HCl < NaCl
2. BNaCl < CH₃COOH < HCl
3. CHCl < NaCl < CH₃COOH
4. DHCl < CH₃COOH < NaCl

Ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃) have the same formula, C₂H₆O, but ethanol boils at a much higher temperature. Why?

1. ADimethyl ether is ionic and ethanol is covalent
2. BEthanol has an O–H group, so its molecules form hydrogen bonds with each other
3. CEthanol molecules are heavier than dimethyl ether molecules
4. DEthanol has more carbon atoms