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A white precipitate will be formed if we add common salt solution to:
(a) Ba(NO3)2 solution
(b) KNO3 solution
(c) AgNO3 solution
(d) Mg(NO3)2 solution
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A colourless lead salt, when heated, produces a yellow residue and brown fumes.
(a) Name the lead salt.
(b) Name the brown fumes.
(c) Write a chemical equation of the reaction involved.
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Name the element whose one of the allotropic forms is buckminsterfullerene.
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State whether the following statement is true or false:
Diamond and graphite are the covalent compounds of carbon element (C)
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Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many hexagons of carbon atoms are present in one molecule of buckminsterfullerene?
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Buckminsterfullerene is spherical molecule in which 60 carbon atoms are arranged in interlocking hexagonal and pentagonal rings of carbon atoms.
How many pentagons of carbon atoms are present in one molecule of buckminsterfullerene?
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Name the black substance of pencil. Will the current flow through the electrical circuit when we use the sharpened ends of the pencil to complete the circuit?
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How does graphite act as a lubricant?
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Name the hardest natural substance known.
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Name a carbon containing molecule which has two double bonds.
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What would be the electron-dot structure of carbon dioxide which has the formula CO2?
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What type of chemical bond is formed between carbon and bromine?
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What do you call the compounds having the same molecular formula but different structural arrangements of atoms?
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What type of bonds are present in hydrogen chloride and oxygen?
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Write the electron-dot structure for the following molecule.
Cl2
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What type of bonds are present in water molecule? Draw the electron-dot structure of water (H2O).
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What type of bonds are present in methane (CH4) and sodium chloride (NaCl)?
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State one major difference between covalent and ionic bonds and give one example each of covalent and ionic compounds.
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What type of bonds are present in H2 molecule? Draw their electron-dot structures.
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What type of bonds are present in CH4 molecule? Draw their electron-dot structures.
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