Chemistry
Identify the following.
(a) The catalyst that is used during the oxidation of SO2.
(b) The formula which shows the arrangement of atoms in the molecule of a compound.
(c) The amount of energy released while converting a neutral gaseous isolated atom into a negatively charged gaseous ion by the addition of electron.
(d) An acid which is formed by the oxidation of ethyne by alk. KMnO4.
(e) The process of heating the concentrated ore in the absence or limited supply of air at a temperature not sufficient to melt the ore.
Chemical Compound
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Answer
(a) Vanadium pentoxide V2O5.
(b) Molecular formula
(c) Electron affinity
(d) Oxalic acid
(e) Calcination
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Related Questions
Complete the following by choosing the correct answer from the bracket.
(a) The number of electrons present in valence shell of a halogen is …………… (5/7).
(b) The degree of ionisation of an acid in an aqueous solution is called its ……………(strength/concentration)
(c) Pure nitric acid decomposes to give yellow solution on exposure to heat due to the formation of …………… (nitrogen dioxide/nitrogen trioxide)
(d) Hydrocarbon having triple bond is called …………… (alkene/alkynes)
(e) The commonly used catalyst for the conversion of ethene to ethane is …………… (nickel/iron).
Match the following Column I with Column II
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(a) Name the experiment illustrated above.
(b) Identify the gas Y and which property of gas Y, does this experiment demonstrate?
(c) State the colour of the water that has entered in the round bottom flask and name another gas which has the same property which can be demonstrated by this experiment.
(a) Give the chemical names and formula of main ores of
- aluminium
- iron
- zinc
(b) Write the principle metal(s) of the following alloys.
- Brass
- Stainless steel