Name the alkali metal which shows diagonal relationship with Mg?
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Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
It is easier to obtain metal from its oxide, as compared from its sulphides and carbonates. So prior to reduction, sulphide ores are converted into oxides by roasting and carbonate...
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A die is rolled. Let E be the event “die shows 4” and F be the event “die shows even number”. Are E and F mutually exclusive
When a die is rolled, the sample space is given by S = {1, 2, 3, 4, 5, 6} Accordingly, E = {4} and F = {2, 4, 6} It is observed that...
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Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point?
(b) : In case of halides of alkali metals, melting point decreases going down the group because lattice enthalpies decreases as size of alkali metal increases. But LiCl has lower...
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Which one of the following plants shows a very close relationship with a species of moth,
Answer is (2) Yucca
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18. 40 gm of a carbonate of an alkali metal or alkaline earth metal containing some inert impurities was made to react with excess HCl solution.
Correct answer is (B) Mass of impurity is 3 gm and metal is Li
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Give reason for the following: (i) alkali metals do not occur free in nature. (ii)alkali metals have low I .E.
(i) They are highly reactive in nature (ii) Because of large atomic size. (iii) LiI is more covalent in character than KI
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Mention the Diagonal Relationship between Beryllium and Aluminium.
The ionic radius of Be2+ is estimated to be 31 pm; the charge/radius ratio is nearly the same as that of the Al3+ ion. Hence beryllium resembles aluminium in some...
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Ten new TV shows started in January — 5 sitcoms, 3 drama and 2 news magazines. By April, only seven of the new shows were still on,
(c) At least one discontinued show was a drama.
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An accurate clock shows 8 O' clock in the morning. Throughout how many degrees will the hour hand rotate, when the clock shows 20'
(d) Angle made by hour hand for 12 hours = 360° Angle made by hour hand for 1 hour = 360°/12 Angle made by hour hand for 6 hours = 360°/12 (6)...
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