Description : Semiconductors possess which type of bonding? a) Metallic b) Covalent c) Ionic d) Magnetic
Last Answer : b) Covalent
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 : What is the type of bonding in silicon? (A) Ionic. (B) Covalent. (C) Metallic. (D) Ionic + Metallic
Last Answer : (B) Covalent.
Description : What type of bonding is most important in CH3CH2CH2CH2CH2CH3? (a) ionic (b) hydrogen (c) covalent (d) polar
Last Answer : covalent
Description : For _______ bonding, one or more electrons are transferred between atoms. a. hydrogen b. ionic c. peptide d. covalent
Last Answer : b. ionic
Description : Write the molecular formulae of: 1. Copper oxide 2. Iron (III) chloride 3. Sodium hydroxide 4. Iron (II) sulphide 5. Lead (II) oxide 6. Hydrogen nitrate (nitric ... Hydrogen sulphate (sulphuric acid) 8. Calcium hydroxide 9. Magnesium carbonate 10.Ammonium carbonate
Last Answer : 1. Copper oxide - CuO 2. Iron (III) chloride - FeCl3 3. Sodium hydroxide - NaOH 4. Iron (II) sulphide - FeS 5. Lead (II) oxide - PbO 6. Hydrogen nitrate (nitric acid) - HNO3 7. ... ) - H2SO4 8. Calcium hydroxide - Ca(OH)2 9. Magnesium carbonate - MgCO3 10.Ammonium carbonate - (NH4)2CO3
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 : 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 bond in hydrogen chloride is which of the following types? Is it w) ionic x) nonpolar covalent y) polar covalent z) covalent network
Last Answer : ANSWER: Y -- POLAR COVALENT
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 : Non-metallic character increases from (1) Magnesium to Barium (2) Potassium to Cesium (3) Oxygen to Selenium (4) Sodium to Chlorine
Last Answer : (4) Sodium to Chlorine Explanation: The elements which lose electrons to form cations are known as metals. Metallic character decreases across a period as we move from left to right.
Description : Which among the following is a covalent compound? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride
Last Answer : (4) Carbon tetrachloride Explanation: Ionic compounds are made up of a metal and non-metal, and covalent compounds are made up of two nonmetals
Description : Which one of the following species contains a polar covalent bond? A oxygen B carbon dioxide C sodium chloride D magnesium fluoride E helium
Last Answer : B carbon dioxide
Description : Which among the following is a covalent compound ? (1) Calcium chloride (2) Magnesium fluoride (3) Sodium chloride (4) Carbon tetrachloride
Last Answer : Carbon tetrachloride
Description : Is hydrofluoric acid ionic or covalent bonding?
Last Answer : What is the answer ?
Description : Which of the following would be least soluble in water? w) Carbon Tetrachloride x) Sodium Oxide y) Magnesium Bromide z) Potassium Phosphate
Last Answer : ANSWER: W -- CARBON TETRACHLORIDE
Description : Write balanced chemical equations for the following word equations: (a) Iron + Chlorine → Iron (III) chloride (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water (c) Magnesium + oxygen → ... oxide (d) Calcium oxide + water → Calcium hydroxide (e) Sodium + chlorine → Sodium chloride
Last Answer : (a) Iron + Chlorine → Iron (III) chloride 4Fe + 3Cl2 → 2F2Cl3 (b) Magnesium + dil sulphuric acid → Magnesium sulphate + water 2Mg + 2H2SO4 → 2MgSO4 + 2H2 (c) Magnesium + oxygen → Magnesium oxide 2Mg ... hydroxide CaO + H2O → Ca(OH)2 (e) Sodium + chlorine → Sodium chloride 2Na + Cl2 → 2NaCl
Description : The action of digitalis is enhanced by (a) Sodium (b) Calcium (c) Magnesium (d) Potassium (e) Chloride
Last Answer : Ans: B
Description : What is the most common salt in sea water? (1) Calcium carbonate (2) Potassium chloride (3) Sodium chloride (4) Magnesium sulphate
Last Answer : (3) Sodium chloride Explanation: Sodium chloride, also known as salt, common salt, table salt or halite, is an ionic compound with the formula NaCl, representing equal proportions of sodium and ... for the salinity of the ocean and of the extracellular fluid of many multi-cellular organisms.
Description : The presence of which of the following salts in water causes corrosion in steam boilers? (1) Sodium Chloride (2) Magnesium Chloride (3) Calcium bicarbonate (4) Potassium bicarbonate
Last Answer : (2) Magnesium Chloride Explanation: Magnesium chloride is the name for the chemical compound with the formula MgCl2 and its various hydrates MgCl2(H2O)x. These salts are typical ionic halides, being highly soluble in water.
Description : __________ chloride present in crude petroleum as impurity is the most prolific producer of HCl during distillation. (A) Magnesium (B) Potassium (C) Calcium (D) Sodium
Last Answer : (A) Magnesium
Description : What is the most common salt in sea water ? (1) Calcium carbonate (2) Potassium chloride (3) Sodium chloride (4) Magnesium sulphate
Last Answer : Sodium chloride
Description : Some substances are good conductor of electricity in both the solid and liquid states. These substances are generally-------? A. ionic substances B. metallic substances (Answer) C. molecular solids D. covalent network solids
Last Answer : B. metallic substances (Answer)
Description : Is Co(s) ionic or covalent or metallic?
Last Answer : Need answer
Description : What are ionic, covalent and metallic bonds?
Last Answer : all of una deh kraz o! u mean say una no sabi dis kyn simple question.
Description : NaCI has _______. (1) Non-polar bonds (2) Polar covalent bonds (3) Metallic bonds (4) Ionic bonds
Last Answer : (4) Ionic bonds Explanation: Sodium Chloride, NaCl. The classic case of ionic bonding, the sodium chloride molecule forms by the ionization of sodium and chlorine atoms and the attraction of the resulting ions.
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 : 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 the following terms refers to the number of molecules or ions attached to a central metallic atom? w) coordination number x) connection number y) bonding number z) none of these
Last Answer : ANSWER: W -- COORDINATION NUMBER
Description : Which of the following elements would form an acid oxide with the formula XO2 and an acidic compound with hydrogen with the formula XH2? w) Sodium x) Magnesium y) Aluminum z) Sulfur
Last Answer : ANSWER: Z -- SULFUR
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 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 : Setting time of cement increases by adding (A) Gypsum (B) Hydrogen peroxide (C) Calcium chloride (D) Sodium oxide
Last Answer : Answer: Option A
Description : Which of the following compounds will be a nonelectrolyte when dissolved in water? w) sodium chloride x) potassium nitrate y) ethanol z) hydrogen chloride
Last Answer : ANSWER: Y -- ETHANOL
Description : Is lauramine oxide ionic or covalent?
Description : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature and hydrogen bonding is more important f
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ionic in nature ... H_(2)O lt H_(2)Te -` boiling point
Last Answer : Oxygen differs from the other elements of the group. Compounds of oxygen with metals are more ... oxides are usually covalent and acidic in nature
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 : 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 : Is it true both ionic and covalent bonds between molecules are very strong?
Last Answer : Both ionic and covalent bonds are between atoms.
Description : Generally metallic oxides are basic and non-metallic are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? a)sulphur dioxide b)Magnesium oxide c)iron oxide d)copper oxide
Last Answer : a)sulphur dioxide
Description : The covalent bond that is repeatedly present between different amino acid residues in a protein is called (a) p-bond (b) hydrogen bond (c) peptide bond (d) metallic bond
Last Answer : Ans:(c)
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 : Is sodium bezoate ionic or covalent?
Last Answer : I consider sodium benzoate an ionic compound. But the bond oxygen-carbon is covalent.
Description : Is sodium bicarbonate ionic polar covalent or non polar covalent?
Last Answer : Sodium bicarbonate is an ionic compound.
Description : Is sodium bromine ionic or covalent?
Last Answer : NaBr is an ionic compound. Generally, a metal bonded with a nonmetal forms an ionic compound. Also, the difference in electronegativity between Na and Br is 2.03, which is definitely ionic.