Description : A compound which is an electron pair donor is generally classified as a: w) Lewis acid x) Bronsted base y) Bronsted acid z) Lewis base
Last Answer : ANSWER: Z -- LEWIS BASE
Description : A substance that accepts an electron pair is classified as a: w) bronsted-lowry acid x) bronsted-lowry base y) lewis acid z) lewis base
Last Answer : ANSWER: Y -- LEWIS ACID
Description : A nucleophile acts as a __________ when it reacts with an electrophile. (a) Bronsted-Lowry acid (b) Arrhenius base (c) Lewis acid (d) Lewis base
Last Answer : Lewis base
Description : An electrophile acts as a __________ when it reacts with a nucleophile. (a) Bronsted-Lowry base (b) Arrhenius base (c) Lewis acid (d) Lewis base
Last Answer : Lewis acid
Description : Which is defined as a species that accepts a proton? (a) Lewis acid (b) Lewis base (c) Bronsted-Lowry acid (d) Bronsted-Lowry base
Last Answer : Bronsted-Lowry base
Description : Identify a species which is not a Bronsted acid but a Lewis acid:
Last Answer : Identify a species which is not a Bronsted acid but a Lewis acid: A. HCl B. `NH_(3)` C. `BF_(3)` D. `H_(3)^(+)O`
Description : Ammonia can be considered a Lewis base because it can donate: w) electrons x) protons y) hydronium ions z) hydroxide ions
Last Answer : ANSWER: A -- ELECTRONS
Description : Which of the following species has the smallest equilibrium separation for its ion-pair? w) KF x) LiF y) BaBr z) NaCl
Last Answer : ANSWER: B -- LiF
Description : Oxygen acts as the final hydrogen acceptor in electron transport chain of mitochondria.
Last Answer : Oxygen acts as the final hydrogen acceptor in electron transport chain of mitochondria.
Description : When radiation breaks an electron pair bond in a molecule and each fragment of the molecule gets one of the bond electrons, the molecular fragments that are formed are called: w) ions x) free radicals y) stable molecules z) gases
Last Answer : ANSWER: X -- FREE RADICALS
Description : Consider the coordination compound , `[Co(NH_(3))_(6)]Cl_(3)`. In the formation of the complex, the species which acts as the Lewis acid is :
Last Answer : Consider the coordination compound , `[Co(NH_(3))_(6)]Cl_(3)`. In the formation of the complex, the species which ... -)` C. `Co^(3+)` D. `NH_(3)`
Description : This black engineer was granted a patent in 1872 for the first automatic oil lubricator. The lubricating cup regulated the flow of oil onto moving parts of machines, revolutionizing the machine industry. ... well-known inventor: w) Elijah McCoy x) Lewis Latimer y) Leonard McFall z) Branville Woods
Last Answer : ANSWER: W -- ELIJAH McCOY
Description : If a material has the capacity to behave either as an acid or a base it is said to be: w) amorphous x) amphoteric y) anhydrous z) aklaline
Last Answer : ANSWER: X -- AMPHOTERIC
Description : Buffer solutions show which one of the following traits: w) absorb acid and base with only small changes in pH x) indefinite stability y) high elasticity z) abnormal density
Last Answer : ANSWER: W -- ABSORB ACID AND BASE WITH ONLY SMALL CHANGES IN pH
Description : In protolytic reactions in which the reactants are much stronger as an acid and a base than the products, the proton transfer reaction: w) does not occur x) approaches completeness y) produces a much stronger acid and a much weaker base z) produces a much weaker acid and a much stronger base
Last Answer : ANSWER: X -- APPROACHES COMPLETENESS
Description : Which of the following chemical reactions does not lead to formation of a salt? w) Reaction of salts with acids. x) The reaction of base anhydrides with acid anhydrides. y) Action of water on oxides of nonmetals. z) Reaction of acid with base.
Last Answer : ANSWER: Y -- ACTION OF WATER ON OXIDES OF NONMETALS. (If water reacts with oxides of nonmetals, an acid is formed.)
Description : Do you expect the carbon hydride of the type (CnH2n+2) to acts as Lewis acid or bases? Justify your answer
Last Answer : Ans: carbon hydride of the types(CnH2n+2)are electron-precise hydrides. In other words they have exact number of electron to form covalent bonds therefore they do not show any tendency to either gain or lose electron hence they are neither Lewis acid or Lewis bases.
Description : In Krebs’ cycle, the FAD precipitates as electron acceptor during the conversion of (a) fumaric acid to malic acid (b) succinic acid to fumaric acid (c) succinyl CoA to succinic acid (d) α-ketoglutarate to succinyl CoA.
Last Answer : (b) succinic acid to fumaric acid
Description : In alcohol fermentation (a) triose phosphate is the electron donor while acetaldehyde is the electron acceptor (b) triose phosphate is the electron donor while pyruvic acid is the electron acceptor (c) there is no electron donor (d) oxygen is the electron acceptor
Last Answer : (a) triose phosphate is the electron donor while acetaldehyde is the electron acceptor
Description : Which of the following is the primary reason for adding calcium carbonate to the reduction process of iron oxide ores ? The calcium carbonate: w) acts as an oxidizing agent x) removes silicate waste products y) acts as a reducing agent z) removes sulfur waste products
Last Answer : ANSWER: X -- REMOVES SILICATE WASTE PRODUCTS
Description : Which of the following is stronger Bronsted base?
Last Answer : Which of the following is stronger Bronsted base? A. B. C. D.
Description : Which of the following is the weakest Bronsted base?
Last Answer : Which of the following is the weakest Bronsted base? A. B. C. D.
Description : Which of the following is the strongest Bronsted base?
Last Answer : Which of the following is the strongest Bronsted base? A. B. C. D.
Description : Is h20 a bronsted base?
Last Answer : Feel Free to Answer
Description : What is the purpose of the salt bridge in an electrochemical cell? w) It allows ion migration. x) It allows electron flow. y) It prevents ion migration. z) It prevents electron flow.
Last Answer : ANSWER: W -- IT ALLOWS ION MIGRATION
Description : The orbital angular momemtum quantum number indicates which one of the following? w) the average distance of the electrons from the nucleus x) the direction of spin of the electron y) the shape of the orbital z) the position about the three axes in space of the orbital
Last Answer : ANSWER: Y -- THE SHAPE OF THE ORBITAL
Description : Which of the following terms refers to the energy released when an electron is added to a neutral atom? w) electrovalence x) electron affinity y) electroconductance z) none of these
Last Answer : ANSWER: X -- ELECTRON AFFINITY
Description : Which of the following indicates the shape of the orbital in which the electron moves? w) principal quantum number x) spin quantum number y) angular momentum quantum number z) none of these
Last Answer : ANSWER: Y -- ANGULAR MOMENTUM QUANTUM NUMBER
Description : The elements that have an outer electron configuration ns2 (read: n - s - 2) are called: w) halogens x) transition metals y) alkaline earths z) noble gases
Last Answer : ANSWER: Y -- ALKALINE EARTHS
Description : The azimuthal quantum number determines the: w) spin of an electron x) shape of an orbital y) size of an orbital z) energy of an orbital
Last Answer : ANSWER: X -- SHAPE OF AN ORBITAL
Description : The 1936 Nobel Prize in chemistry was awarded to Peter J.W. Debye for his studies of: w) kinetic energy of colliding particles x) electron configuration y) dipole moments z) conformations of cyclohexane
Last Answer : ANSWER: Y -- DIPOLE MOMENTS
Description : In the filling of electron orbitals for the elemen sulfur, which has 16 electrons, the number of electrons in the 3p orbitals is: w) 3 x) 4 y) 6 z) 0
Last Answer : ANSWER: X -- 4
Description : Alpha rays are different from beta rays in one of the following ways. Are they different since: w) alpha rays are deflected in a magnetic field and beta rays are not x) alpha rays are ... negative charge z) alpha rays are produced within the nucleus and beta rays are produced outside the nucleus
Last Answer : ANSWER: Y -- ALPHA RAYS HAVE A POSITIVE CHARGE AND BETA RAYS HAVE A NEGATIVE CHARGE
Description : Acetamide is a much weaker base than ammonia. This is because (a) the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation. (b) ) ... NH2 group. (d) an H atom from the nitrogen is less easily lost from CH3CONH2 than from NH3.
Last Answer : the electron withdrawing effect of the C=O group makes the lone pair of electrons on nitrogen atom less available for protonation
Description : What purpose does FeCl3 serve in the electrophilic aromatic substitution reaction between chlorine and benzene? (a) It serves as a radical initiator to produce the chlorine radical needed to propagate the ... by reacting with the Cl2 and thereby activates it toward attack by benzene's π electrons.
Last Answer : It serves as a Lewis acid catalyst by reacting with the Cl2 and thereby activates it toward attack by benzene’s π electrons.
Description : _______ Lewis Acid - Base Complexation Chemistry includes all the common mineral acids. (a) Type – 1 (b) Type – 2 (c) Type – 3 (d) Type – 4
Last Answer : (c) Type – 3
Description : A net ionic equation does NOT show: w) electronic charges x) solid products (precipitates) y) spectator ions z) reacting species
Last Answer : ANSWER: Y -- SPECTATOR IONS
Description : A standardized base solution should be protected from which of the following gases? w) hydrogen x) carbon dioxide y) nitrogen z) argon
Last Answer : ANSWER: X -- CARBON DIOXIDE
Description : Which of the following is NOT a base in DNA? w) uracil x) guanine y) adenine z) cytosine
Last Answer : ANSWER: W -- URACIL
Description : Which of the following compounds is the strongest base? w) NH3 x) PH3 y) H2O z) H2S
Last Answer : ANSWER: W -- NH3
Description : What is the final electron acceptor in aerobic respiration? -Biology
Last Answer : answer:
Description : What is the final electron acceptor in the light dependent reaction of photosynthesis? -Biology
Description : In photosystem-I the first electron acceptor is
Last Answer : In photosystem-I the first electron acceptor is A. Plastocyanin B. An iron-sulfur protein C. Ferrodoxin D. Cytochorme
Description : The first electron acceptor in photosystem-I of cyclic photophosphorylation is
Last Answer : The first electron acceptor in photosystem-I of cyclic photophosphorylation is A. Cytochrome B. Plastocyanin C. Ferrodoxin D. Plastoquinone
Description : Primary electron acceptor of PS-II is
Last Answer : Primary electron acceptor of PS-II is A. Pheophytin B. Ferredoxin C. PQ D. PC
Description : The correct sequence of electron acceptor in ATP synthesis is (a) Cyt. b, c, a3, a (b) Cyt. c, b, a, a3 (c) Cyt. a, a, b, c (d) Cyt. b, c, a, a3.
Last Answer : (d) Cyt. b, c, a, a3.
Description : The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called (a) glycolysis (b) fermentation (c) aerobic respiration (d) photorespiration.
Last Answer : (b) fermentation
Description : What is the role of NAD+ in cellular respiration? (a) It functions as an enzyme. (b) It functions as an electron carrier. (c) It is a nucleotide source for ATP synthesis. (d) It is the final electron acceptor for anaerobic respiration.
Last Answer : c) It is a nucleotide source for ATP synthesis.
Description : In photosystem I, the first electron acceptor is (a) an iron-sulphur protein (b) ferredoxin (c) cytochrome (d) plastocyanin.
Last Answer : (a) an iron-sulphur protein