MCQOPTIONS
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MCQOPTIONS
This section includes 335 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
which one among the following does not have the hydrogen bond? |
| A. | water |
| B. | liquid NH3 |
| C. | phenol |
| D. | liquid HCl |
| Answer» E. | |
| 302. |
Which type of bonding would be expected between I and Br? |
| A. | hydraulic |
| B. | non-polar covalent |
| C. | ionic |
| D. | polar covalent |
| Answer» E. | |
| 303. |
Polar refers to _____. |
| A. | the formation of uneven size ions |
| B. | bonds that have an uneven distribution of charge |
| C. | bonds that have an even distribution of charge |
| D. | even-sized electronegativities in a bond |
| Answer» C. bonds that have an even distribution of charge | |
| 304. |
The model for metallic bonding is known as _____. |
| A. | the Rutherford model |
| B. | the electron cloud model |
| C. | the quantum model |
| D. | the electron sea model |
| Answer» E. | |
| 305. |
Atoms bond primarily to _____. |
| A. | increase thier potential energy and lose stability |
| B. | make more atoms |
| C. | increase their potential energy and gain stability |
| D. | reduce their potential energy and gain stability |
| Answer» E. | |
| 306. |
Which of the following contains a covalent bond? |
| A. | NO3 |
| B. | Mg3N2 |
| C. | Li2O |
| D. | NaCl |
| Answer» B. Mg3N2 | |
| 307. |
On hybridization of one s and one p orbitals we get: |
| A. | three orbital in a plane |
| B. | two orbital at 180° |
| C. | two mutually perpendicular orbitals |
| D. | four orbitals directed tetrahedrally |
| Answer» C. two mutually perpendicular orbitals | |
| 308. |
Which formula represents a molecular substance? |
| A. | Al2O3 |
| B. | CO |
| C. | CaO |
| D. | Li2O |
| Answer» C. CaO | |
| 309. |
A strontium atom differs from a strontium ion in that the atom has a greater |
| A. | number of protons |
| B. | number of electrons |
| C. | atomic number |
| D. | mass number |
| Answer» C. atomic number | |
| 310. |
the molecule having one unpaired electron is: |
| A. | CO |
| B. | NO |
| C. | O2 |
| D. | CN- |
| Answer» C. O2 | |
| 311. |
When an ionic compound is dissolved in water, the ions in solution can best be described as |
| A. | dehydrated ions and molecules |
| B. | hydrated molecules only |
| C. | hydrated ions only |
| D. | both hydrated molecules and hydrated ions |
| Answer» D. both hydrated molecules and hydrated ions | |
| 312. |
Which substance has a polar covalent bond between its atoms? |
| A. | K3N |
| B. | NaCl |
| C. | NH3 |
| D. | Ca3N2 |
| Answer» D. Ca3N2 | |
| 313. |
carbon tetrachloride has no net dipole moment because of |
| A. | its planar structure |
| B. | its regular tetrahedral structure |
| C. | similar sizes of carbon and chlorine atoms |
| D. | similar electron affinities of carbon and chlorine |
| Answer» C. similar sizes of carbon and chlorine atoms | |
| 314. |
The ion that isoelectronic with CO is |
| A. | CN- |
| B. | O2+ |
| C. | O2- |
| D. | N2+ |
| Answer» B. O2+ | |
| 315. |
Which substance is an example of a network solid? |
| A. | silicon dioxide |
| B. | nitrogen dioxide |
| C. | sulfur dioxide |
| D. | carbon dioxide |
| Answer» B. nitrogen dioxide | |
| 316. |
The bond between two identical non-metal atoms has a pair of electrons: |
| A. | transferred fully from one atom to another |
| B. | with identical spins |
| C. | unequally shared between the two. |
| D. | equally shared between them |
| Answer» E. | |
| 317. |
Which sequence of Group 18 elements demonstrates a gradual decrease in the strength of the Van der Waals forces? All the choices are elements in the liquid state. |
| A. | Kr, Xe, Ar, Ne |
| B. | Ne, Ar, Kr, Xe |
| C. | Xe, Kr, Ar, Ne |
| D. | Ar, Kr, Ne, Xe |
| Answer» D. Ar, Kr, Ne, Xe | |
| 318. |
Which molecule is a polar molecule? |
| A. | N2 |
| B. | CO2 |
| C. | CH4 |
| D. | H2O |
| Answer» E. | |
| 319. |
Which is the chemical formula for iron(III)sulfate? |
| A. | Fe2(SO4)3 |
| B. | Fe3SO4 |
| C. | Fe2SO4 |
| D. | Fe(SO4)3 |
| Answer» B. Fe3SO4 | |
| 320. |
The forces of attraction that exist between nonpolar molecules are called |
| A. | ionic bonds |
| B. | Van der Waals / dispersion forces |
| C. | covalent bonds |
| D. | electrovalent bonds |
| Answer» C. covalent bonds | |
| 321. |
Which kinds of bonding can be found in a sample of H2O(l)? |
| A. | Nonpolar covalent bonds only |
| B. | Hydrogen bonds only |
| C. | Ionic and nonpolar hydrogen bonds |
| D. | Both polar covalent and hydrogen bonds |
| Answer» E. | |
| 322. |
Which substance is a network solid? |
| A. | CO2 |
| B. | Li2O |
| C. | H2O |
| D. | SiO2 |
| Answer» E. | |
| 323. |
Which one of the following compounds is most likely to be an ionic compound? |
| A. | KF |
| B. | CS2 |
| C. | CCl4 |
| D. | CO2 |
| Answer» B. CS2 | |
| 324. |
Which compound contains no ionic character? |
| A. | K2O |
| B. | CaO |
| C. | NH4Cl |
| D. | CO |
| Answer» E. | |
| 325. |
Which substance represents a molecule that can combine with a proton (H1+)? |
| A. | HCl |
| B. | NH3 |
| C. | Na1+ |
| D. | H3O1+ |
| Answer» E. | |
| 326. |
Which of the elements listed below has the greatest electronegativity? |
| A. | As |
| B. | Ga |
| C. | Na |
| D. | Cs |
| Answer» B. Ga | |
| 327. |
What is the formula for potassium sulfide? |
| A. | K2S |
| B. | K2S2 |
| C. | KS |
| D. | KS2 |
| Answer» B. K2S2 | |
| 328. |
What is the name of the ionic compound formed from lithium and bromine? |
| A. | lithium bromium |
| B. | lithium bromine |
| C. | lithium bromide |
| D. | lithium bromate |
| Answer» D. lithium bromate | |
| 329. |
Which of these elements does not exist as a diatomic molecule? |
| A. | F |
| B. | Ne |
| C. | H |
| D. | I |
| Answer» C. H | |
| 330. |
Which of the following pairs of elements is most likely to form an ionic compound? |
| A. | oxygen and chlorine |
| B. | sodium and aluminum |
| C. | nitrogen and sulfur |
| D. | magnesium and fluorine |
| Answer» E. | |
| 331. |
What is the formula for sodium sulfate? |
| A. | NaSO4 |
| B. | Na(SO4 )2 |
| C. | Na2 (SO4 ) 2 |
| D. | Na2 SO4 |
| Answer» E. | |
| 332. |
Which of the following elements does NOT form an ion with a charge of 1+? |
| A. | fluorine |
| B. | sodium |
| C. | potassium |
| D. | hydrogen |
| Answer» B. sodium | |
| 333. |
What is the formula unit of aluminum oxide? |
| A. | Al2O3 |
| B. | AlO3 |
| C. | Al3O |
| D. | AlO |
| Answer» B. AlO3 | |
| 334. |
How many valence electrons are transferred from the nitrogen atom to potassium in the formation of the compound potassium nitride? |
| A. | 0 |
| B. | 1 |
| C. | 3 |
| D. | 2 |
| Answer» B. 1 | |
| 335. |
How do atoms achieve noble-gas electron configurations in single covalent bonds? |
| A. | One atom completely loses two electrons to the other atom in the bond. |
| B. | Two atoms share two pairs of electrons. |
| C. | Two atoms share two electrons. |
| D. | Two atoms share one electron. |
| Answer» E. | |