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How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?
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How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?
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How many atoms of each kind are present in the following molecule:
Calcium oxide
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How many electrons are required or released by each atom in calcium oxide to attain the nearest noble gas configuration?
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Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one forms a cation?
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Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one :
State type of bond between Y and Z and give its molecular formula.
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What do you understand by redox reactions? Explain oxidation and reduction in terms of loss or gain of electrons.
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State the following is a reduction reaction or oxidation reaction.
\[\ce{Pb -> Pb^2+ + 2e-}\]
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State the following is a reduction reaction or oxidation reaction.
\[\ce{Fe^2+ - e- -> Fe^3+}\]
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State the following is a reduction reaction or oxidation reaction.
\[\ce{A^3+ + e- -> A^2+}\]
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State the following is a reduction reaction or oxidation reaction.
\[\ce{Cu -> Cu^2+}\]
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Answer the questions below relating your answers only to salts in the following list: Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water?
- What name is given to the water in the compound copper sulphate-5-water?
- If copper sulphate-5-water is heated, anhydrous coppersulphate is formed. What is its colour?
- By what means, other than healing, could you dehydrate copper sulphate-5-water and obtain anhydrous coppersulphate?
- Which one of the salts in the given list is deliquescent?
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Name the probable cation present based on the following observation:
White precipitate insoluble in NH4OH but soluble in NaOH.
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Name :
a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
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Colour of an aqueous solution of copper sulphate is ______.
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Colour of the precipitate formed on adding NaOH solution to iron (II) sulphate solution is ______.
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A metal which produces hydrogen on reacting with alkali as well as with acid.
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Explain Why?
"When stating the volume of a gas, the pressure and temperature should also be given."
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What do you understand by redox reactions?
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Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of oxidation.
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