Objective Questions

Questions (1872)

#	Question	Topic	Actions
1301	Most non-metals especially gases like H2, O2, N2, and Cl2 have what type of mol…	General Chemistry	View
1302	What is the atomicity of O3 and CO2?	General Chemistry	View
1303	What is a molecular or polyatomic ion?	General Chemistry	View
1304	Which of the following is an example of a polyatomic ion?	General Chemistry	View
1305	What is valency?	General Chemistry	View
1306	What is oxidation state?	General Chemistry	View
1307	What is the valency of Oxygen according to the notes?	General Chemistry	View
1308	What is the oxidation number of Oxygen according to the notes?	General Chemistry	View
1309	How do you determine chemical formulas using charges?	General Chemistry	View
1310	What is the correct formula when Mg2+ combines with O2-?	General Chemistry	View
1311	What is a chemical reaction?	General Chemistry	View
1312	What is a chemical equation?	General Chemistry	View
1313	What does a balanced chemical equation give?	General Chemistry	View
1314	What is a combination reaction?	General Chemistry	View
1315	What is another name for a combination reaction?	General Chemistry	View
1316	Which of the following is an example of a combination reaction?	General Chemistry	View
1317	What is a decomposition reaction?	General Chemistry	View
1318	What do most decomposition reactions require?	General Chemistry	View
1319	Which of the following is an example of a decomposition reaction?	General Chemistry	View
1320	What is a displacement or replacement reaction?	General Chemistry	View
1321	When does a displacement reaction take place?	General Chemistry	View
1322	What is the general form of a displacement reaction?	General Chemistry	View
1323	Which of the following is an example of a displacement reaction?	General Chemistry	View
1324	What is the reactivity order for halogens in displacement reactions?	General Chemistry	View
1325	What is a double displacement reaction?	General Chemistry	View
1326	What is the general form of a double displacement reaction?	General Chemistry	View
1327	What is a precipitation reaction?	General Chemistry	View
1328	What is the precipitate in a precipitation reaction?	General Chemistry	View
1329	According to solubility rules, salts formed with group 1 cations and NH4+ catio…	General Chemistry	View
1330	Acetates, nitrates, and perchlorates are generally what?	General Chemistry	View
1331	Bromides, chlorides, and iodides are generally soluble, but what are the except…	General Chemistry	View
1332	Sulfates are soluble with the exception of sulfates formed with which ions?	General Chemistry	View
1333	Carbonates, phosphates, sulfides, oxides, and hydroxides are generally what?	General Chemistry	View
1334	If all the ions in a reaction are shown to be soluble based on solubility rules…	General Chemistry	View
1335	What are exothermic reactions?	General Chemistry	View
1336	In an exothermic reaction, how does the energy needed to break bonds compare to…	General Chemistry	View
1337	What is the sign of ΔH for an exothermic reaction?	General Chemistry	View
1338	What are endothermic reactions?	General Chemistry	View
1339	In an endothermic reaction, how does the energy needed to break bonds compare t…	General Chemistry	View
1340	What is the sign of ΔH for an endothermic reaction?	General Chemistry	View
1341	Which of the following is an example of an endothermic reaction mentioned in th…	General Chemistry	View
1342	What is oxidation?	General Chemistry	View
1343	What is reduction?	General Chemistry	View
1344	What is a redox reaction?	General Chemistry	View
1345	What did Democritus propose about cutting matter?	General Chemistry	View
1346	Who disagreed with Democritus and believed matter could be divided forever?	General Chemistry	View
1347	According to Dalton's Atomic Theory, what are atoms?	General Chemistry	View
1348	According to Dalton's Atomic Theory, atoms of a given element are what?	General Chemistry	View
1349	According to Dalton's Atomic Theory, can atoms be created or destroyed?	General Chemistry	View
1350	According to Dalton's Atomic Theory, in what ratios do atoms of different eleme…	General Chemistry	View
1351	According to Dalton's Atomic Theory, what happens to atoms in chemical reaction…	General Chemistry	View
1352	Which part of Dalton's Atomic Theory is no longer true with the discovery of su…	General Chemistry	View
1353	Which of the following are isotopes of hydrogen?	General Chemistry	View
1354	How do you calculate relative atomic mass from isotopic composition?	General Chemistry	View
1355	Bromine consists of 50% 79Br and 50% 81Br. What is its relative atomic mass?	General Chemistry	View
1356	Which parts of Dalton's Atomic Theory are still considered true today?	General Chemistry	View
1357	Dalton based his atomic theory on which laws?	General Chemistry	View
1358	According to the law of conservation of mass, what must equal the mass of the p…	General Chemistry	View
1359	If heating 10.0g of CaCO3 produces 4.4g of CO2 and 5.6g of CaO, do these observ…	General Chemistry	View
1360	What did J.J. Thomson discover using cathode ray tubes?	General Chemistry	View
1361	What did J.J. Thomson initially call the particles he discovered?	General Chemistry	View
1362	What is a cathode-ray tube (CRT)?	General Chemistry	View
1363	In Thomson's cathode ray experiment, what happened to the stream of electrons?	General Chemistry	View
1364	What model of the atom did J.J. Thomson propose?	General Chemistry	View
1365	What does the Bohr theory establish about atoms?	Atomic Structure and Quantum Theory	View
1366	What is the electronic structure of an atom?	Atomic Structure and Quantum Theory	View
1367	Our knowledge of electronic structure is the result of which major development?	Atomic Structure and Quantum Theory	View
1368	Where has our understanding of the electronic structure of atoms come from?	Atomic Structure and Quantum Theory	View
1369	In the first stage of quantum theory development, how was the electron treated?	Atomic Structure and Quantum Theory	View
1370	In the second stage of quantum theory development, how was the electron treated?	Atomic Structure and Quantum Theory	View
1371	Who assumed in 1900 that energy can be released or absorbed by atoms only in qu…	Atomic Structure and Quantum Theory	View
1372	What did Einstein explain by assuming that light is quantized?	Atomic Structure and Quantum Theory	View
1373	What is the threshold frequency in the photoelectric effect?	Atomic Structure and Quantum Theory	View
1374	According to Einstein's theory, what happens if photons have less energy than t…	Atomic Structure and Quantum Theory	View
1375	What is the unusual position adopted regarding the nature of light?	Atomic Structure and Quantum Theory	View
1376	What is a practical application of the photoelectric effect mentioned in the no…	Atomic Structure and Quantum Theory	View
1377	What is an example of a continuous spectrum?	Atomic Structure and Quantum Theory	View
1378	What is monochromatic radiation?	Atomic Structure and Quantum Theory	View
1379	What produces radiation containing many different wavelengths?	Atomic Structure and Quantum Theory	View
1380	What is produced when radiation from sources is separated into its different wa…	Atomic Structure and Quantum Theory	View
1381	What was Rutherford's discovery that contributed to Bohr's model?	Atomic Structure and Quantum Theory	View
1382	What did Bohr assume about electron motion in his model of the hydrogen atom?	Atomic Structure and Quantum Theory	View
1383	According to classical physics, what should happen to an electron moving in a c…	Atomic Structure and Quantum Theory	View
1384	What did Bohr assume about the prevailing laws of physics in his model?	Atomic Structure and Quantum Theory	View
1385	According to Bohr, what kind of orbits are permitted for electrons?	Atomic Structure and Quantum Theory	View
1386	What happens to an electron in an allowed energy state according to Bohr's mode…	Atomic Structure and Quantum Theory	View
1387	What is a limitation of the Bohr model?	Atomic Structure and Quantum Theory	View
1388	Which type of orbits did the Bohr model fail to explain?	Atomic Structure and Quantum Theory	View
1389	Which principle could the Bohr model not explain?	Atomic Structure and Quantum Theory	View
1390	An electrolytic cell converts:	CHM 101 Past Questions	View
1391	Who suggested that wave-particle quality should apply to matter as well as radi…	Atomic Structure and Quantum Theory	View
1392	What is the de Broglie relation?	Atomic Structure and Quantum Theory	View
1393	According to the de Broglie relation, what is the wavelength of a heavy particl…	Atomic Structure and Quantum Theory	View
1394	What does the uncertainty principle state?	Atomic Structure and Quantum Theory	View
1395	Who developed the uncertainty principle?	Atomic Structure and Quantum Theory	View
1396	What is a consequence of the uncertainty principle regarding electrons?	Atomic Structure and Quantum Theory	View
1397	What do we use instead of trying to define the exact position and momentum of a…	Atomic Structure and Quantum Theory	View
1398	Who proposed the wave equation now known as Schrödinger's wave equation?	Atomic Structure and Quantum Theory	View
1399	What approach did Schrödinger's work open for dealing with subatomic particles?	Atomic Structure and Quantum Theory	View
1400	In quantum mechanics, how are electrons treated?	Atomic Structure and Quantum Theory	View

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