Description : For which molecule can the bonding be described in terms of sp3 hybrid orbitals of the central atom? w) CH4 x) SF6 y) BF3 z) PCL5
Last Answer : ANSWER: B -- CH4
Description : 13. Which one of the following pairs is isostructural (i.e. having the same shape and hybridization)? (1) 4 4 [BF and NH ] (2) 3 3 [BCl and BaCl ] (3) 3 3 [NH and NO ] (4) [NF3 and BF3 ] Sol: [1] In both the compounds, central atom i
Last Answer : (1) 4 4 [BF and NH ]
Description : Which of the following species contains three bond pairs and one lone pair around the central atom? (1) PCl3 (2) H2O (3) BF3 (4) NH2
Last Answer : PCl3
Description : Point group D3h belong to the molecule a. BF3 b. NH3 c. CHCl3 d. CH3
Last Answer : a. BF3
Description : When The number of bonding pairs in a molecule is equal to the number of electrons?
Last Answer : Feel Free to Answer
Description : Explain why the water molecule has a bent shape and a bond angle less than 109.5° The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together
Last Answer : The electron repulsion between the two lone pairs of electrons on the oxygen of water causes the O–H bonds to squeeze close together
Description : In molecule of calcium sulfide calcium has two valence electron bonds and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium?
Last Answer : What is the answer ?
Description : What is the amount of bonding angle in ammonia molecule ?
Last Answer : See this link with details http://bn.m.wikipedia.org/wiki/Amonia
Description : (3) the number of electrons orbiting around the nucleus Explanation: The chemical behavior of an atom is determined by the number of electrons on its outer shell. As for the chemical bonding properties of ... , and in what ratio atoms will bond to form the 20,000,000 different substances on Earth.
Last Answer : Methyl phenyl ether can be obtained by reacting - (1) phenolate ions and methyl iodide (2) methoxide ions and bromobenzene (3) methanol and phenol (4) bromobenzene and methyl bromide
Description : Out of NH3 & BF3 Which is polar & Why?
Last Answer : Ans. NH3 has net dipole moment because resultant of 3N-H bond & lone pair lie in the same direction. While BF3 being trigonal planar has zero dipole moment.
Description : Which of the following are Lewis bases? (a) NF3 (b) BF3 (c) CH3OCH3 (d) (a) and (c
Last Answer : (a) and (c
Description : Which of the following is a nucleophile? (a) AlCl3 (b) H3O+ (c) BF3 (d) CN–
Last Answer : CN–
Description : Which of the following molecules has a dipole moment? w) BF3 x) NH3 y) CCL4 z) CH4
Last Answer : ANSWER: B -- NH3
Description : Which of the following molecules does NOT have a dipole moment of zero? w) BeCl2 x) BF3 y) CO2 z) NH3
Last Answer : ANSWER: Z -- NH3
Description : In 3rd generation dentin bonding agents, HEMA (Hydroxyethylmethacrylate) is 1. a hydrophilic monomer that wets the dentinal surface 2. a hydrophilic resin that forms a hybrid layer by chemically reacting the intertubular dentin. 3. a hydrophilic ... a. 1,2 b. 1,4 c. 2,3 d. 1,3 e. 3,4
Last Answer : b. 1,4
Description : The covalent bonding of atoms forms a/an a. Molecule. b. Ion. c. Element. d. Isomer.
Last Answer : a. Molecule.
Description : Name the type of bonding in water molecule and explain its formation.
Last Answer : Type of bonding : Single co-valent bonding. Formation of Water Molecule: Water molecule (H2O) contains two atoms of hydrogen & one atom of oxygen. Each hydrogen atom is in short ... atom. Thus, two separate single co-valent bonds are formed between hydrogen & oxygen atoms.
Description : Explain the formation of water molecule and name the type of bonding.
Last Answer : Formation of Water Molecule: H ( Z = 1 ) 1S1 (1) O ( Z = 8 ) 1S2 , 2S2 , 2P4 (2, 6) Water molecule (H2O) contains two atoms of hydrogen & one atom of oxygen. ... single co-valent bonds are formed between hydrogen & oxygen atoms. Type of bonding: Single co-valent bonding.
Description : Where are the two lone pairs of electrons of the oxygen atom in an alcohol molecule located? (a) in two p orbitals (b) in two sp orbitals (c) in two sp2 orbitals (d) in two sp3 orbitals
Last Answer : in two sp3 orbitals
Description : How many electron lone pairs are on the central atom in Hydrogen Sulfide?
Last Answer : ANSWER: TWO
Description : (4) less soluble in blood than nitrogen at high pressure Explanation: Deep-sea divers have their oxygen supply mixed with helium in order to avoid the toxic nature of oxygen under extreme pressures. The ... blood which blocks blood flow as the diver comes to the surface of the sea from underwater.
Last Answer : The chemical bahaviour of an atom depends upon - (1) the number of protons in its nucleus (2) the number of neutrons in the nucleus (3) the number of electrons orbiting around the nucleus (4) the number of nucleons in the nucleus
Description : The smallest particle of an element is called - (1) Ion (2) Electron (3) Atom (4) Molecule
Last Answer : (3) Atom Explanation: An element is a substance completely made up of one atom. However, the atom itself is not the smallest known particle, but instead each atom is made up of three individual parts: electrons, protons and neutrons.
Description : Which of the following statements correctly describes the general reactivity of alkynes? (a) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile. (b) The σ bonds ... fail to undergo electrophilic addition reactions. (d) Alkynes are generally more reactive than alkenes.
Last Answer : Alkynes are generally more reactive than alkenes.
Description : The number of lone pairs of electrons on xenon atom in `XeF_(4)` molecule is
Last Answer : The number of lone pairs of electrons on xenon atom in `XeF_(4)` molecule is A. 4 B. 3 C. 2 D. zero
Description : What shape would a molecule with two bounds groups and two lone pairs have?
Last Answer : The correct answer is: Bent.
Description : In tRNA molecule, the anticodon arm possesses (A) 5 Base pairs (B) 7 Base pairs (C) 8 Base pairs (D) 10 Base pairs
Last Answer : Answer : A
Description : The acceptor arm in the tRNA molecule has (A) 5 Base pairs (B) 7 Base pairs (C) 10 Base pairs (D) 20 Base pairs
Last Answer : Answer : B
Description : In which of the following pairs is the probability of finding the electron in only xy - plane is zero for both orbatals ?
Last Answer : In which of the following pairs is the probability of finding the electron in only xy - plane is zero for both ... . `4d_(zx),3P_(z)` D. None of these
Description : Which of the following contains three pairs of electron?
Last Answer : Which of the following contains three pairs of electron? A. Carbocation B. Carbanion C. Free radical D. None of these
Description : What are the structures called that give an appearance as ‘beads-on-string’ in the chromosomes when viewed under electron microscope? (a) Genes (b) Nucleotides (c) Nucleosomes (d) Base pairs
Last Answer : Nucleosomes
Description : In order to generate electron-hole pairs, the maximum wavelength of radiation for Silicon (Band gap = 1.1 eV) is (a) 1.88 μm (b) 1.68 μm (c) 1.13 μm (d) 1.54 μm
Last Answer : In order to generate electron-hole pairs, the maximum wavelength of radiation for Silicon (Band gap = 1.1 eV) is 1.13 μm
Description : Thiols are alcohol analogs in which the oxygen has been replaced by sulfur (e.g., CH3SH). Given the fact that the S-H bond is less polar than the O-H bond, which of the following ... (c) Hydrogen bonding forces would be the same. (d) No comparison can be made without additional information
Last Answer : Hydrogen bonding forces are weaker in thiols.
Description : Which force is most important in allowing ammonia, NH3, to dissolve in water? A hydrogen bonding B dipole-induced dipole C ion-dipole D dipole-dipole E ionic
Last Answer : A hydrogen bonding
Description : The proper way to apply plastic electrical tape to an electric cable splice is to _____________. A. apply tape to the braided cover, but avoid touching it B. wind the tape so that each turn overlaps ... tape in one non-overlapping layer only D. heat the tape with a soldering iron for good bonding
Last Answer : Answer: B
Description : What molecule and provide electron is in the light reaction What is the waste product?
Last Answer : Need answer
Description : Which of the following statements regarding mitochondria is incorrect? (a) Mitochondrial matrix contains single circular DNA molecule and ribosomes. (b) Outer membrane is permeable to monomers of ... transport are embedded in outer membrane. (d) Inner membrane is convoluted with infoldings.
Last Answer : (c) Enzymes of electron transport are embedded in outer membrane.
Description : In order to become a/an ______, an atom of chlorine must ______ an electron. a. Ion; Gain b. Molecule; Lose c. Ion; Lose d. Molecule; Gain
Last Answer : a. Ion; Gain
Description : Which one of the following statements is WRONG? (A) A singlet or triplet state may result when one of the electrons from the HOMO is excited to higher energy levels (B) In an ... the electron from the singlet excited state returns to ground state, the molecule always shows fluorescence phenomenon
Last Answer : (C) Triplet excited state is more stable than the singlet excited state
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 : Which one of the following pairs of atoms would form a non-polar covalent bond? A C and O B N and O C Cl and Cl D Na and Cl E Ne and Ne
Last Answer : C Cl and Cl
Description : What type of bonding helps in stabilishing the a-helix structure of proteins? -Chemistry
Last Answer : a-helix formation -» Intramolecular hydrogen bonding.
Description : What is Ionic Bonding ?
Last Answer : : Ionic bond is the bond formed by the force of attraction of static electricity on each other by creating positive and negative charges by transferring one or more electrons from the outer layer of one atom ... chemical reaction. For example , Na-Cl ( sodium chloride) is an ionic bond of food salt.
Description : What is Peptide Bonding ?
Last Answer : The amide bond formed after the removal of water molecules in reaction with the carbolic radical of one amino acid and the a -amino radical of another amino acid is called peptide bond.
Description : What is Insertion Bonding ?
Last Answer : Insertion bond is the bond formed by the supply of a pair of electrons required for the formation of covalent bonds between two atoms by one atom and the other atoms sharing it equally.
Description : What is Bonding Strength ?
Last Answer : The force of attraction that attaches another atom to a bonded atom is called bonding force. In sodium chloride ionic bonds exist between sodium ions and chloride ions. In the carbon dioxide molecule ... attraction that attaches another atom to an atom bound by all these bonds is called bond energy.
Description : What is the bonding strength of OH ?
Last Answer : The bonding strength of OH is 464 kJ
Description : What is chemical bonding ? What is a chemical bond ?
Last Answer : The chemical bond is the force of attraction that attaches one atom to another atom in the molecule of a substance.
Last Answer : The ionic bond is the constant electrical attraction that binds the molecules of a compound to the cations and anions formed by the exchange of electrons.
Description : Distinguish between bonding molecular orbital and anti-bonding molecular orbital.
Last Answer : Ans.(i)The bonding molecular orbital has lower energy and hence greater stability than the corresponding antibonding molecular orbital. (ii) Just as the electron probability distribution around a ... formed by the subtraction of wave function of atomic orbital is called antibonding molecular orbital