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Q5) The hybridisation of carbon in diamond, graphite and acetylene is in the order of [ AFMC 1998]




SOLUTION


Answer: (d)


Q6) How will you separate a solution ( miscible) of benzene + CHCl3




SOLUTION

Distillation As boiling points of Benzene is 80.1 °C , and boiling point of CHCl3 is 61.2 °C
Answer: (c)


Q7) Which of the following has lowest boiling point? [ AFMC 2009]



SOLUTION

In case of isomeric alkenes, boiling point decreases with increase in branching of the chain
Answer:(d)



Q8) Sodium nitroprusside when added to an alkaline solution of sulphide ions produces a [ AFMC 2005]



SOLUTION

Na2[Fe(CN) 5NO] + S2- → Na4[Fe(CN) 5NOS] which is Purple Coloured
Answer: (c)


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