Free Liquids MCQs with Answers
350 Liquids MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Liquid properties arise from intermolecular attractions, including surface tension, viscosity, cohesion and adhesion. The topic links evaporation, vapour pressure and boiling point with temperature, explains hydrogen bonding, and covers water's unusual expansion on freezing and its density maximum, which distinguish water from ordinary liquids.
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350 questions · page 10 of 18
- A. CH₃CH₂OH
- B. CH₃-O-CH₃
- C. CH₃CH₂Cl
- D. All of these
Explanation: Hydrogen bonding in alcohols. Alcohol is an organic molecule containing an -O-H group.
Correct answer: CH₃CH₂OH- A. Dipole-dipole interactions
- B. Ion-dipole interactions
- C. Hydrogen bonding
- D. London-dispersion forces
Explanation: HF has a higher boiling point than HCl because of the hydrogen bonding that exists between HF molecules.
Correct answer: Hydrogen bonding- A. O-H
- B. N-H
- C. F-H
- D. Cl-H
Explanation: Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom (such as oxygen, nitrogen, fluorine, or chlorine)…
Correct answer: F-H- A. DNA
- B. Proteins
- C. Carbohydrates
- D. Lipids
Explanation: In DNA, hydrogen bonding occurs between complementary base pairs (adenine-thymine and guanine-cytosine), holding the two strands of the…
Correct answer: Lipids- A. 10
- B. 12
- C. 20
- D. 2
Explanation: If we compare the strength of covalent bonds to hydrogen bonds, covalent bonds are much stronger.
Correct answer: 20- A. H-bonding
- B. Dipole dipole forces
- C. Ionic forces
- D. Debye force
Explanation: Glue is made of PVA and water molecules. The oxygen in water molecules has lone pairs that can form hydrogen bonds with the h of another…
Correct answer: H-bonding- A. Strong
- B. Moderate
- C. Weak
- D. Constant
Explanation: Both H2O and HF have electronegative oxygen and fluorine atoms respectively in their molecule.
Correct answer: Strong- A. Ammonia and Carbon
- B. Acetone and Kerosene
- C. Acetone and Chloroform
- D. Water and Neon
Explanation: This is correct as In chloroform, three chlorine atoms are present. These atoms deprive the carbon atoms of the electrons.
Correct answer: Acetone and Chloroform- A. Chemical bonding
- B. Ion dipole force
- C. Dipole-dipole force
- D. Polar force
Explanation: Dipole forces are also called hydrogen bonding. Chemical Bonding refers to the formation of a chemical bond between two or more atoms…
Correct answer: Dipole-dipole force- A. 1 time
- B. 2 times
- C. 5 times
- D. 20 times
Explanation: The strength of a hydrogen bond is 5% of that of a covalent bond/ a covalent bond is 20 times stronger than a hydrogen bond.
Correct answer: 20 times- A. Two electronegative atoms
- B. H atom and two electronegative atoms
- C. Two H atoms
- D. None of these
Explanation: Hydrogen bonding occurs between the highly electronegative atom of one molecule (oxygen, fluorine, and nitrogen) and the hydrogen atom…
Correct answer: H atom and two electronegative atoms- A. Polar bond
- B. Non-polar bond
- C. H-bond
- D. All of these
Explanation: Ethyl alcohol is non-polar but it has a hydrogen atom that has a partial positive charge so it can interact with the oxygen of water…
Correct answer: H-bond- A. NH3
- B. H2O
- C. HF
- D. CH4
Explanation: Water has a higher boiling point because the molecule is held together by strong hydrogen bonding which is between the partial positive…
Correct answer: H2O- A. Chlorine
- B. Ammonia
- C. Water
- D. Hydrochloric acid
Explanation: Option C is correct since each water molecule can form two hydrogen bonds involving their hydrogen atoms plus two further hydrogen bonds…
Correct answer: Water- A. H-bonding
- B. Dipole-dipole forces
- C. London dispersion forces
- D. Debye forces
Explanation: Electronegative atoms responsible for hydrogen bonding include N, O, F and rarely Cl.
Correct answer: H-bonding- A. Dipole dipole forces
- B. Induced dipole forces
- C. Chemical bond
- D. H-bond
Explanation: The base pairing, i.e. H-bond stabilizes the three-dimensional structure of DNA, i.e. the diameter of DNA also.
Correct answer: H-bond- A. Ionic, one
- B. Coordinate covalent, one lone pair
- C. Covalent, 2 lone pair
- D. All of these options are correct
Explanation: The answer is Coordinate covalent, one lone pair. In hydrogen bonding, the O-atom of water molecule forms a coordinate covalent bond with…
Correct answer: Coordinate covalent, one lone pair- A. Random
- B. Zig zag
- C. Tetrahedral
- D. Linear
Explanation: A hydrogen bond forms when the free-electron pair of one HF molecule interacts with the bonded hydrogen of another HF molecule.
Correct answer: Zig zag- A. 5th period
- B. 3rd period
- C. 6th period
- D. 7th period
Explanation: The boiling point of hydrides generally increases from top to bottom in a group.
Correct answer: 3rd period- A. 3 free electron
- B. One lone pair of electron
- C. 5 electron in outer shell
- D. None of these options are correct
Explanation: Nitrogen in ammonia has only 1 lone pair of electrons which it utilizes in hydrogen bonding.
Correct answer: One lone pair of electron