Description : Forces in ionic crystalline solids are primarily which of the following? w)covalent x)electrostatic y)Van der Waals z)magnetic
Last Answer : ANSWER: X -- ELECTROSTATIC
Description : Which of the following is the strongest interaction? (a) a covalent bond (b) dipole-dipole interactions (c) hydrogen bonding (d) van der Waals
Last Answer : a covalent bond
Description : The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell
Last Answer : ANSWER: X -- ONLY WEAK VAN DER WAALS FORCES HOLD THE ATOMS TOGETHER
Description : Diamond is hard because (a) It has strong covalent bonds (b) Discrete molecules of carbon are held by strong Vander Waal’s forces (c) It involves Van der Waal's forces (d) Covalent bonds are directional unlike ionic bonds
Last Answer : Ans:(a)
Description : Which types of chemical bonds are the weakest? a. covalent c. ionic b. Van der Waals d. none of the above
Last Answer : b. Van der Waals
Description : Why do alcohols have boiling points much higher than hydrocarbons of similar molecular weight? (a) Alcohols have greater van der Waals attraction forces. (b) Alcohol molecules have greater ... of volatilization. (d) Alcohols must overcome greater ionic forces in the process of volatilization.
Last Answer : Hydrogen bonds must be broken in the process of volatilization
Description : The force responsible for drops of liquid assuming a spherical shape is known as: w) strong nuclear force x) Van der Waals attraction y) surface tension z) osmotic pressure
Last Answer : ANSWER: Y -- SURFACE TENSION
Description : Covalent network crystals have-------? A. higher melting point then molecular crystals (Answer) B. lower melting point then molecular crystals C. discrete molecules linked by Van der waals forces D. hydrogen bonding
Last Answer : A. higher melting point then molecular crystals (Answer)
Description : The bond most likely to be formed when two atoms differ SOMEWHAT in their tendency to attract electrons is: w) nonpolar ionic x) polar ionic y) polar covalent z) nonpolar covalent
Last Answer : ANSWER: Y -- POLAR COVALENT
Description : Which of the following best explains why the melting points of saturated fats increase with increasing molecular weight? (a) decreased hydrogen bonding (b) increased hydrogen bonding (c) decreased intermolecular van der Waal’s interactions (d) increased intermolecular van der Waal’s interactions
Last Answer : increased intermolecular van der Waal’s interactions
Description : The bond in hydrogen chloride is which of the following types? Is it w) ionic x) nonpolar covalent y) polar covalent z) covalent network
Description : If two atoms exert equal attractions for electrons, they can form: w) a nonpolar covalent bond x) an ionic bond y) a polar covalent bond z) no bond
Last Answer : ANSWER: W -- A NONPOLAR COVALENT BOND
Description : Pick the wrong statement: hydrogen bonding results in (a) Increased solubility in water (b) Higher Van der Waal's forces (c) Molecular association (d) Abnormal boiling point
Last Answer : Ans:(b)
Description : Which action best accounts for the solubility of aldehydes and ketones in water? (a) Polar interactions between solute molecules. (b) H-bonding between solute molecules. (c) Van der waals forces (d) H-bonding between solute and solvent molecules
Last Answer : H-bonding between solute and solvent molecules
Description : A bond in which there is an unequal attraction for the shared electrons and a resultant unbalanced distribution of charge is which one of the following types of bonds? w) ionic x) pure covalent y) nonpolar covalent z) polar covalent
Last Answer : ANSWER: Z -- POLAR COVALENT
Description : The bond in Fluorine is which of the following types? Is it w) ionic x) nonpolar covalent y) polar covalent z) covalent network
Last Answer : ANSWER: X -- NONPOLAR COVALENT
Description : Name type of adsorption in which van der Waals forces are present.
Last Answer : Name type of adsorption in which van der Waals forces are present.
Description : Van der Waals equation explains the behaviour of (a) Mixture of gases (b) Ideal gas (c) Real gas (d) Water gas
Last Answer : Ans:(c)
Description : Chemisorption (chemical adsorption) is (A) Same as "Van der Waals" adsorption (B) Characterised by adsorption of heat (C) An irreversible phenomenon (D) A reversible phenomenon
Last Answer : (C) An irreversible phenomenon
Description : Van der Waals derived an expression for the pressure defect', if the observed pressure is denoted as p' and volume is denoted as V', the gas pressure in the bulk of the gas is equal to: A. p + ... a: constant for the particular gas D. p + (a V²); where a: constant for the particular gas
Last Answer : p + a/(V²); where a: constant for the particular gas
Description : Internal energy of a gas obeying Van-Der-Waals equation of state, [p + (a/v2)] (V - b) = RT, depends upon its (A) Pressure & temperature (B) Pressure & specific volume (C) Temperature & specific volume (D) Temperature only
Last Answer : (A) Pressure & temperature
Description : In 2-butene, which of the following bonds prevents the atoms at each end of the bond from rotating with respect to each other. Is it an: w) ionic bond x) sigma bond y) strong bond z) double bond
Last Answer : ANSWER: Z -- DOUBLE BOND
Description : When two ice cubes are pressed together, they join to form one cube. Which one of the following helps to hold them together? (1) Hydrogen bond formation (2) Vander waals forces (3) Covalent attraction (4) Dipole interaction
Last Answer : (1) Hydrogen bond formation Explanation: When two ice cubes are pressed together, they join to form one cube due to hydrogen bond.
Last Answer : Hydrogen bond formation
Description : Which of the following has a multiple covalent bond? w) Bromine x) Hydrogen y) Oxygen z) Chlorine Monofluoride
Last Answer : ANSWER: Y -- OXYGEN
Description : The following type of bonding is strongly directional in solids. (A) Vander Waal's (B) Ionic (C) Metallic (D) Covalent
Last Answer : D) Covalent
Description : The type of crystal lattice exemplified in a diamo is: w) ionic crystal x) covalent network crystal y) metallic crystal z) covalent molecular crystal
Last Answer : ANSWER: X -- COVALENT NETWORK CRYSTAL
Description : Which of these molecules is bound by ionic bonds? w) H2O x) CH4 y) NaCl z) C6H12O6
Last Answer : ANSWER: Y -- NaCl
Description : Sodium chloride is an example of what kind of compound? w) ionic x) covalent y) polyatomic z) monatomic
Last Answer : ANSWER: W -- IONIC
Description : The characteristic bonds in nonmetal oxides are which of the following types? w) network x) covalent y) ionic z) coordinate covalent
Last Answer : ANSWER: X -- COVALENT
Description : Which class of solids could have London Forces the attractive forces between particles in crystal lattice positions? w) ionic x) covalent y) metallic z) molecular
Last Answer : ANSWER: Z -- MOLECULAR
Description : Arrange the following types of interactions in correct order of their increasing strength : Covalent, hydrogen bonding, Vander Waals, dipole dipole
Last Answer : Vander Waals < dipole dipole < hydrogen bonding < covalent.
Description : Which of the following elements would form a covalent bond with Bromine? w) Calcium x) Aluminum y) Oxygen z) Tin
Description : Carbon atoms link together with other carbon atoms in all of the following ways EXCEPT w) networks x) chains y) ionic bonds z) rings
Last Answer : ANSWER: Y -- IONIC BONDS
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 : Which bond has the LEAST ionic character? w) H - F x) Li - F y) Li - Br z) F - F
Last Answer : ANSWER: Z -- F - F
Description : For _______ bonding, one or more electrons are transferred between atoms. a. hydrogen b. ionic c. peptide d. covalent
Last Answer : b. ionic
Description : What is the difference between an ionic bond a covalent bond and a hydrogen bond?
Last Answer : The ionic bond bond is based on electrostatic attraction between ions.The covalent bond is based on electrons sharing between two atoms.The hydrogen bond exist between two polar groups and is a weak bond.
Description : A single covalent bond (a) Is formed by the transfer of two electrons (b) Exists between hydrogen and chlorine in an aqueous solution, of hydrochloric acid (c) Is longer than a double bond (d) Does not require energy to disrupt it unlike an ionic bond
Description : What is the weak bond holding the nucleic acids together in DNA? a. ionic bonds b. covalent bonds bonds c. polar bond d. hydrogen bond
Last Answer : d. hydrogen bond
Description : The bond is a weak bond that can exist between poles of adjacent molecules. a. hydrogen b. ionic c. polar covalent d. non polar covalent
Last Answer : d. non polar covalent
Description : Hydrocarbons that contain a triple bond between carbon atoms are known as: w) alkenes x) alkanes y) alkynes z) polymers
Last Answer : ANSWER: Y -- ALKYNES
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 : Bonds formed by the sharing of an electron pair between two atoms are known as - (1) Covalent bonds (2) Ionic bonds (3) Weak bonds (4) None of the above
Last Answer : (1) Covalent bonds Explanation: Bonds which are formed by the sharing of an electron pair between two atoms are known as covalent bonds.
Description : What type of bonding is most important in CH3CH2CH2CH2CH2CH3? (a) ionic (b) hydrogen (c) covalent (d) polar
Last Answer : covalent
Description : When does ionic character develop in covalent bond?
Last Answer : Ans. When the difference in electro negativity of the combining atom is more than 1.9 it develops 50 % ionic character .
Description : Which rule explains the covalent character of ionic bond ?
Last Answer : Ans. Fajan’s Rule
Description : Define Ionic Bond & Covalent Bond how it is formed explain with example.
Last Answer : Ans : Ionic Bond OR Electrovalent Bond : The attraction that binds oppositely charged ions together is termed as electrovalent bond or ionic bond. It is formed between the atoms with electronegativity ... most shell by means of sharing of unpaired electrons & thus a covalent bond is formed.
Description : In biotin-containing enzymes, the biotin is bound to the enzyme by (A) An amide linkage to carboxyl group of glutamine (B) A covalent bond with CO2 (C) An amide linkage to an amino group of lysine (D) An amide linkage to α-carboxyl group of protein
Last Answer : Answer : C
Description : Will carbon as an atom interact with other atoms to form ionic or covalent bonds?
Last Answer : Carbon as an atom interacts with other atoms to from covalent bonds.