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Q41) Which of the following is Lewis acid? [ MLNR 1994]




SOLUTION


Answer: (b)


Q42) The metal ion M+3 loses 3 electrons. Its oxidation number will be ... [ CPMT 1999]




SOLUTION


Answer: (b)


Q43) The chemical composition of cryolite mineral is ... [ MP PET 2002]



SOLUTION


Answer:(d)



Q44) A particular element belongs to group13 and second period of the periodic table, it is ... [MP CET 1994]



SOLUTION

Group 13 second period element id Boron is non-metal and solid at room temperature
Answer: (c)


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