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Q97) Which of the following is a pseudohalide? [ AIIMS 1980]




SOLUTION

CN- behaves like halide but is not halide
Answer: (a)


Q98) A ga reacts with CaO but not with NaHCO3. the gas is .. [AFMC 1987]




SOLUTION


Answer: (b)


Q99) Which of the following is strongest acid [ IIT 1989]



SOLUTION

More the oxidation number of central atom more the acidic compound
Answer:(a)



Q100) The correct increasing order of ionic size is .. [ IIT 1991]



SOLUTION

All the species are isoelectronic. their size increases as the nuclear charge decreases from Mg to F
Answer: (d)


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