Description : The disappearance of the dinosaurs also marks the end of which geological era? w) Precambrian x) Cambrian y) Mesozoic (pron: mez-ah-zo-ik) z) Cenozoic (pron: see-nah-zo-ik)
Last Answer : ANSWER: Y -- MESOZOIC
Description : On the Phanerozoic (pron: fan-eh-reh-zO-ik) time scale, which of the following geologic periods occurred approximately 500 to 570 million years ago? Is it: w) Cambrian x) Ordovician (pron: ord-eh-vish-en) y) Carboniferous z) Silurian
Last Answer : ANSWER: W -- CAMBRIAN
Description : On the Phanerozoic (pron: fan-eh-row-zo-ick) Time Scale, which of the following geologic periods occurred approximately 395 to 430 million years ago? Is it: w) Jurassic (pron: ju-ras-ick) x) Permian y) Carboniferous z) Silurian
Last Answer : ANSWER: Z -- SILURIAN
Description : On the Phanerozoic (pron: fan-eh-reh-zO-ik) Time Scale, which of the following geologic periods occurred approximately 225 to 280 million years ago? Is it: w) Jurassic x) Permian y) Carboniferous z) Silurian
Last Answer : ANSWER: X -- PERMIAN
Description : Which of the following molecules has a permanent electric dipole moment? w) H2O x) Cl2 y) CH4 z) N2
Last Answer : ANSWER: W -- H2O
Description : A family of organic compounds containing only carb and hydrogen and having only single bonds are the: w) alkenes and alkanes x) alkanes and cycloalkanes y) alkynes (pron: AL-kines) and alkenes z) cycloalkanes and alkenes
Last Answer : ANSWER: B -- ALKANES AND CYCLOALKANES
Description : Which of the following has the highest bond order? (1) N2 (2) O2 (3) Cl2 (4) H2
Last Answer : (1) N2 Explanation: A high bond order indicates more attraction between electrons. A higher bond order also means that the atoms are held together more tightly.
Description : Which of the following group of compounds is most soluble in water? w) alkanes (pron: ak-KANES) x) alcohols y) aldehydes (pron: al-deh-HIDES) z) alkenes (pron: al-KEENS)
Last Answer : ANSWER: X -- ALCOHOLS
Description : Which of the following four compounds would have t most ionic bond? w) CH4 x) LiF y) CsF z) N2
Last Answer : ANSWER: Y -- CsF
Description : Consider the following gaseous equilibrium: PCl3 + Cl2 = PCl5 + heat. Which of the following changes will shift it to the right: w) lower the temperature x) remove some Cl2 y) increase the volume z) add a catalyst
Last Answer : ANSWER: W -- LOWER THE TEMPERATURE
Description : Which of the following nitrogen-containing compounds is most readily used by plants? w) nitrogen dioxide x) ammonia y) nitrous oxide z) nitrate
Last Answer : ANSWER: Z -- NITRATE
Description : A sample of natural gas containing 80% methane (CH4 ) and rest nitrogen (N2 ) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is (A) CO2 : 6 ... 96, N2 :72.06 (D) CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74
Last Answer : (B) CO2 : 7.42, CO : 1.86, O2 : 4.64, N2 :86.02
Description : Which of the following is believed to be responsible for the hole in the ozone layer over Antarctic? w) carbon dioxide x) compounds containing sulfur y) radioactivity z) compounds containing chlorine
Last Answer : ANSWER: Z -- COMPOUNDS CONTAINING CHLORINE
Description : Which gas is used for converting vegetable oils into saturated fats? (1) H2 (2) O2 (3) Cl2 (4) SO2
Last Answer : (1) H2 Explanation: Hydrogenation - to treat with hydrogen - is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst. ... oils are derived from polyunsaturated fatty acids (containing more than one carbon-carbon double bonds).
Description : Which gas is used for converting vegetable oils into saturated fats ? (1) H2 (2) O2 (3) Cl2 (4) SO2
Last Answer : H2
Description : Which of the following compounds will not undergo azo coupling reaction with benzene diazonium chloride?
Last Answer : Which of the following compounds will not undergo azo coupling reaction with benzene diazonium chloride? ... B. Phenol C. Anisole D. Nitrobenzene
Description : An amine contains which one of the following functional groups? w) NO2 x) NOH y) NH2 z) N2
Last Answer : ANSWER: Y -- NH2
Description : Which of the following is NOT an organic acid? w) butyric (pron: byu-TEER-ik) x) sulfuric y) acetic z) citric
Last Answer : ANSWER: X -- SULFURIC
Description : Ethylene diamine tetraacetoacetate (pron: te-tra-a-see-tow-AS-e-tate) (EDTW) is often used for which of the following: w) Determine hardness of water x) Measure the amount of zinc in a solution. y) A preservative in foods z) All of the above
Last Answer : ANSWER: Z -- ALL OF THE ABOVE
Description : What is the molecular geometry of thiocyanate (pron: thie-owe-SIE-a-nate) ion (SCN minus 1)? w) linear x) angular y) tetrahedral z) pyramidal
Last Answer : ANSWER: W -- LINEAR
Description : What is the primary CONSTITUENT of human bones? w) Calcium sulfate x) Calcium carbonate y) Hydroxyapatite (pron: high-drox-ee-ap-eh-tite) z) Chloroapatite (pron: klor-o-ap-eh-tite)
Last Answer : ANSWER: Y -- HYDROXYAPATITE
Description : Impurities in metal ores are called: w) flux x) gangue (pron: gang) y) slag z) sediments
Last Answer : ANSWER: X -- GANGUE
Description : In what category may LIPASE (pron: lie-pase) be placed w) carbohydrates x) lipids y) enzymes z) nucleic acids
Last Answer : ANSWER: C--ENZYMES
Description : Moth balls contain: w) formalin x) chitin (pron: kite-en) y) formaldehyde z) naphthalene
Last Answer : ANSWER: Z -- NAPHTHALENE
Description : Which of the following minerals is a source of iro w) Bauxite (pron: box-ite) x) Hematite (pron: he-ma-tite) y) Malachite (pron: mal-ah-kite) z) Galena (pron: ga-lee-nah)
Last Answer : ANSWER: X -- HEMATITE
Description : The loss of water of crystallization from a hydrat when exposed to air is termed: w) efflorescence (pron: eh-floor-es-ence) x) deliquescence (pron: del-i-kwes-ence) y) quiescence (pron: kwi-es-ence) z) anhydrogenation
Last Answer : ANSWER: W -- EFFLORESCENCE
Description : Ferrous is an equivalent name for which of the following? w) Iron (IV) (pron: iron-4) x) Iron (III) (pron: iron-3) y) Iron (II) (pron: iron-2) z) Iron (I) (pron: iron-1)
Last Answer : ANSWER: Y -- IRON (II)
Description : A mystical substance supposedly released during combustion was called: w) thermal flax x) ether y) caloric z) phlogiston (pron: flow-gis-ton)
Last Answer : ANSWER: Z -- PHLOGISTON
Description : The triple bond between the carbon atoms causes acetylene, C2H2, to have which of the following shapes? w) trigonal planar (pron: try-gon-al) x) linear y) tetrahedral z) trigonal bipyramidal
Last Answer : ANSWER: X -- LINEAR
Description : Which one of the following is NOT a vitamin? w) ascorbic acid x) niacin (pron: nI-eh-sen) y) trypsin (pron: trip-sen) z) riboflavin (pron: rye-bow-fla-vin)
Last Answer : ANSWER: Y -- TRYPSIN
Description : Which of the following refers to the scattering of light by colloidal particles? w) Rutherford effect x) Tyndall effect (pron: tin-dahl) y) Thompson effect z) none of these
Last Answer : ANSWER: X -- TYNDALL EFFECT
Description : What of the following reactions demonstrates a synthesis reaction A) Mg plus H2SO4 and gt MgSO4 plus H2 B) 2NaCl and gt 2Na plus Cl2 C) C plus O2 and gt CO2 D) Zn plus 2HCl and gt ZnCl2 plus H2?
Last Answer : C+O2 →CO2
Description : What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell? (A) Cl2 & Na (B) Cl2 & H2 (C) O2 & H2 (D) Cl2 , H2 & NaOH solution
Last Answer : (D) Cl2 , H2 & NaOH solution
Description : The conjugate acid of water is: w) OHx) H2 y) O2 z) H3O+
Last Answer : ANSWER: Z -- H3O+
Description : A piano tuner notices a standing Lissajous (pron: Liss-a-jew) curve on his oscilloscope. The tone being projected is: w) out of harmony x) sharp y) resonating z) flat
Last Answer : ANSWER: Y -- RESONATING
Description : Which of the following is NOT closely associated with a non-magnetic Phase Diagram? w) Eutectic Temperature (pron: you-tek-tik) x) Curie Point y) Solidus z) Liquidus Curves
Last Answer : ANSWER: X -- CURIE POINT
Description : The most efficient heat engine that can operate between two temperature reservoirs T1 and T2 is: w) jet engine x) internal combustion engine y) Carnot engine (pron: car-no) z) steam engine
Last Answer : ANSWER: Y -- CARNOT ENGINE
Description : Which of the following is NOT a noble gas? w) radon x) xenon (pron: zee-non) y) astatine (pron: as-tah-teen) z) krypton
Last Answer : ANSWER: Y -- ASTATINE
Description : What law describes the force between two stationary electrically charged objects? w) Ampere's law x) Coulomb's law y) Kirchoff's Rules (pron: kir-koff rules) z) Ohm's law
Last Answer : ANSWER: X -- COULOMB'S LAW
Description : Large streams that enter a standing body of water produce which of the following geological features at their mouths? w) deltas x) load casts y) anticlines z) sync (pron: sink)
Last Answer : ANSWER: W -- DELTAS
Description : Cordaites (pron: kor-day-i-tees) were the ancestor of one of the following. Were they primitive: w) amphibians x) cone-bearing trees y) snakes z) sharks
Last Answer : ANSWER: X -- CONE-BEARING TREES
Description : Which of the following is the oldest period of tim lasting from the beginnings of the earth to approximately 570 million year ago? w) Precambrian x) Pleistocene (pron: ply-sto-sin) y) Miocene (pron: my-o-sin) z) Jurassic
Last Answer : ANSWER: W -- PRECAMBRIAN
Description : An igneous rock which is commonly black, has a glassy texture, and has a conchoidal (pron: kong-koid-al) fracture is whic of the following? w) pelite (pron: pel-ite) x) calcite y) obsidian z) none of the above
Last Answer : ANSWER: Y -- OBSIDIAN
Description : Pedocal (pron: ped-eh-kal) soils are usually found to have developed in: w) forests x) swamps y) grasslands z) jungles
Last Answer : ANSWER: Y -- GRASSLANDS
Description : On a topographic map, lines that indicate water depth are termed: w) isogonic lines (pron: eye-seh-gone-ik) x) bathymetric lines (pron: bath-i-meh-trik) y) isopachs z) none of these
Last Answer : ANSWER: X -- BATHYMETRIC LINES
Description : The Miocene, Eocene and Paleocene epoches belong t what geologic period on the Phanerozoic Time Scale? Is it the: w) Devonian x) Permian y) Triassic (pron: try-as-ick) z) Tertiary
Last Answer : ANSWER: Z -- TERTIARY
Description : Which of the following minerals is a source of copper? w) Bauxite (pron: box-ite) x) Hematite y) Malachite z) Galena
Last Answer : ANSWER: Y -- MALACHITE
Description : Apatite is what number on Moh's (pron: moes: rhyme with toes) hardness scale? w) 1 x) 3 y) 5 z) 7
Last Answer : ANSWER: Y -- 5
Description : Deposits that form when the ice in a glacier melts are called: w) drifts x) dunes y) veins z) cirques (pron: serks)
Last Answer : ANSWER: W -- DRIFTS
Description : A lake or pond community is also known as a: w) pelagic community (pron: pe-laj-ick) x) benthic community (pron: ben-thick) y) lentic community (pron: len-tick) z) lotic community (pron: lot-ick)
Last Answer : ANSWER: Y -- LENTIC COMMUNITY