This is the Multiples Choice Questions Part 11 of the Series in General chemistry as one of the General Engineering and Applied Sciences (GEAS) topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including past Board Questions in General Engineering and Applied Sciences (GEAS) field.
Online Questions and Answers in General Chemistry Series
Following is the list of multiple choice questions in this brand new series:
Continue Practice Exam Test Questions Part XI of the Series
Choose the letter of the best answer in each questions.
501. Which of the following natural poisons is the deadliest?
- a.) digitoxin (from foxglove)
- b.) palytoxin carboxylic acid (from Hawaiian coral)
- c.) coniine (from hemlock)
- d.) batrachotoxin (from poison arrow frogs)
502. What is the most abundant metal in the earth’s crust?
- a.) magnesium
- b.) calcium
- c.) aluminum
- d.) iron
503. What is aquaregia?
- a.) an acid mixture that dissolves gold
- b.) a purple pigment
- c.) supercooled water
- d.) a hormone produced by queen bees
504. Which of the following contains the highest percentage of lead?
- a.) pewter
- b.) lead shot
- c.) type metal
- d.) lead solder
505. Which of the following salts has a solubility that decreases as temperature increases?
- a.) Li2CO3
- b.) Cs2CO3
- c.) Rb2CO3
- d.) K2CO3
506. Which of the following pH’s for a rain sample would be considered "acid rain"?
- a.) 8
- b.) 4
- c.) 5
- d.) 7
507. The 1938 edition of the CRC handbook lists "Alabamine" as an element. The element was named for the state of Alabama and had the symbol Ab. What is the modern name for alabamine?
- a.) niobium
- b.) promethium
- c.) astatine
- d.) francium
508. Salts of which of the following elements make blue fireworks blue?
- a.) potassium
- b.) strontium
- c.) barium
- d.) copper
509. Chlorine was called chlorine because:
- a.) it was first isolated in Chlorox (TM) bleach
- b.) it is yellow-green
- c.) its discoverer’s daughter was named Chloe
- d.) it is a powerful oxidizing agent
510. Many laboratory fires are caused by "flashback" that occurs when the vapors of flammable organic solvents come into contact with a burner or heater. Nearly all organic vapors are heavier than air and so flow along table top surfaces.
Which of the following flammable vapors will NOT behave in this manner?
- a.) butane
- b.) diethyl ether
- c.) petroleum ether
- d.) carbon monoxide
511. The candela is one of the seven base units in the SI system. It measures:
- a.) luminous intensity
- b.) combustion rate
- c.) magnetism
- d.) power
512. What is "piranha solution"?
- a.) concentrated nitric acid
- b.) a mixture of sulfuric acid and hydrogen peroxide
- c.) solution used to digest lutfisk
- d.) fuming sulfuric acid
513. What is a"Pauling Point"?
- a.) a lethal dose of vitamin C
- b.) the midpoint of a valence bond
- c.) a model that minimizes both error and effort
- d.) a point where electronegativity changes sign
514. How much plutonium would be required to make an atomic bomb as powerful as the one that devastated Nagasaki in World War II?
- a.) 1 to 3 kg
- b.) 5 to 10 kg
- c.) 20 to 30kg
- d.) 0.5 to 1kg
515. Which of the following metals is added to steel in lighter flints to make it spark easily when struck?
- a.) tantalum
- b.) zirconium
- c.) titanium
- d.) cobalt
516. What is "diamond ink"?
- a.) a mixture of HF, BaSO4, and fluorides for etching glass
- b.) colloidal diamond ink for marking metal
- c.) carbon disulfide-based ink for marking diamonds
- d.) colloidal silver ink
517. Who discovered actinium, element 89?
- a.) Irene Curie
- b.) Marie Curie
- c.) Glenn Seaborg
- d.) André-Louis Debierne
518. What intermolecular forces do geckos use to stick to walls and ceilings?
- a.) static ionic attractions
- b.) van der Waals forces
- c.) quadrupole-quadrupole attractions
- d.) dipole-dipole attractions
519. Which element can be drawn into thinner wires and hammered into thinner sheets than any other element?
- a.) Au
- b.) Cu
- c.) Mt
- d.) Na
520. Copper objects that are exposed to moist air for a long time develop a green coating. The coating is primarily made of:
- a.) basic copper carbonate
- b.) green vitriol
- c.) copper (II) oxide
- d.) copper (I) oxide
521. Which of the halogens is most abundant in nature?
- a.) iodine
- b.) astatine
- c.) fluorine
- d.) chlorine
522. Which element has the largest atoms?
- a.) Cs
- b.) Mt
- c.) Fr
- d.) U
523. Which of the following contains the highest percentage of gold?
- a.) 18 carat white gold
- b.) 18 carat yellow gold
- c.) U. S. gold coins
- d.) dental gold
524. What is "butter of arsenic"?
- a.) pure white arsenic
- b.) arsenous acid
- c.) yellow arsenic
- d.) arsenic trichloride
525. At room temperature, which element conducts electricity better than any other element?
- a.) Ag
- b.) Au
- c.) Pb
- d.) Cu
526. What is a doubly magic nucleus?
- a.) a nucleus with a lobed shape
- b.) a nucleus that can exist in two places simultaneously
- c.) nuclei with a full shell of protons and a full shell of neutrons
- d.) a nucleus with two magical spins
527. Acetylene torches and burners used by glassblowers produce intense ultraviolet light. Glassblowers wear special glasses that contain which of the following elements to absorb the UV?
- a.) neodymium and praseodymium
- b.) ozone
- c.) copper
- d.) cerium
528. What is the smallest mass ever measured directly by a weighing scale?
- a.) A 5 ng virus crystal
- b.) A 10 microgram bacterial cell
- c.) An electron
- d.) A 22 femtogram graphite speck
529. Salts of which of the following metals are added to fireworks to make them brilliant red?
- a.) potassium
- b.) barium
- c.) strontium
- d.) iron
530. Which of the following is NOT one of the basic building blocks of proteins?
- a.) phenylalanine
- b.) purine
- c.) serine
- d.) praline
531. Which of the following radioactive elements is used in household fire detectors?
- a.) americium
- b.) neptunium
- c.) plutonium
- d.) uranium
532. The Trauzl lead block test has been used for over a century to measure which of the following?
- a.) how high one can pile a tower of blocks after lead exposure
- b.) penetrating ability of ionizing radiation
- c.) the darkness of pencil leads
- d.) explosiveness
533. What makes sparklers spark?
- a.) flaming aluminum flakes
- b.) burning iron particles
- c.) burning sulfur
- d.) luminal
534. Poison ivy rashes are caused by:
- a.) an intense allergic reaction to an otherwise harmless organic compound
- b.) an organic oil that disrupts cell membranes
- c.) a waxy organic base that interferes with fluid balance
- d.) a corrosive organic acid produced by the leaves
535. Besides water, what chemical compound is used in greatest amounts by the global economy with little or no preprocessing?
- a.) NaCl
- b.) CaCO3
- c.) SiO2
- d.) Cellulose
536. The spectrum of sunspots is more complex than the spectrum of the rest of the sun. This is because:
- a.) metallic elements concentrate in sunspots
- b.) more molecules are present in sunspots
- c.) sunspots are more turbulent
- d.) more ions are present in sunspots
537. Oxygen "always" has an oxidation number of -2. But there are several exceptions. In which of the following compounds and ions does oxygen have an oxidation number of +2?
- a.) O2F2
- b.) H2O2
- c.) O3 –
- d.) OF2
538. All U. S. coins are alloys that always contain some amount of:
- a.) gold
- b.) silver
- c.) copper
- d.) nickel
539. On a clear, moonless night, it’s still possible to see by the light of the sky. Where does most of the light come from?
- a.) dust that scatters light all the way from the dayside of the earth
- b.) chemiluminescent chemical reactions
- c.) the Big Bang
- d.) solar wind
540.) Hypatia of Alexandria was one of the first well known teachers of science. One of her many inventions was:
- a.) an apparatus for distilling water
- b.) the first weight scale
- c.) papermaking
- d.) indigo dye
541. What is "liver of sulfur"?
- a.) potassium sulfide
- b.) a crystal form of sulfur
- c.) lead sulfide
- d.) a condition caused by sulfide poisoning
542. What deadly poison sometimes contaminates peanuts?
- a.) Plutonium
- b.) Cyanide
- c.) Ricin
- d.) Aflatoxtin
543. The 1938 edition of the CRC handbook lists "Virginium"as an element. The element was named for the state of Virginia and had the symbol Va. What is the modern name for virginium?
- a.) promethium
- b.) astatine
- c.) francium
- d.) technetium
544. Meitnerium (element 109) is an artificially produced element. Which of the following is the size of the first meitnerium sample ever produced?
- a.) 10 atoms
- b.) 1atom
- c.) 1g
- d.) 1ng
545. Which element is the most powerful oxidizing agent?
- a.) fluorine
- b.) chlorine
- c.) potassium
- d.) oxygen
546. What is the minimum number of photons that must reach the retina each second to produce vision?
- a.) 2× 109
- b.) 2× 106
- c.) 2× 103
- d.) 20
547. An isotope near the neutron drip line:
- a.) has so many extra neutrons that additional ones won’t bind to it
- b.) captures neutrons that drip from other nuclei
- c.) "drips"a stream of neutrons until it becomes stable
- d.) has a teardrop like configuration
548. Alchemists in ancient Egypt tested gold for purity by remelting it and heating it. If the gold became whiter, it contained:
- a.) copper
- b.) lead
- c.) silver
- d.) tin
549. Which of the "rare" gases is the most common in the atmosphere?
- a.) helium
- b.) xenon
- c.) argon
- d.) radon
550. Which of the following is the smallest container that could hide enough plutonium to make an atomic bomb capable of destroying 40 city blocks?
- a.) an automobile trunk
- b.) A soft drink can
- c.) a coffee can
- d.) a small van