HARD
12th ICSE
IMPORTANT
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Formaldehyde cannot be obtained by the use of Rosenmund's reduction because formyl chloride is at room temperature.

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Important Questions on Sample Question Paper 4

MEDIUM
12th ICSE
IMPORTANT
Iron crystallises in a bcc system with a lattice parameter of 2.861 A. Calculate the density of iron in the bcc system (atomic weight of Fe = 56, NA=6.02 X 1023 mol-1)
EASY
12th ICSE
IMPORTANT
 Soaking of water by a sponge is an example of
MEDIUM
12th ICSE
IMPORTANT
Extra pure N2 can be obtained by heating
EASY
12th ICSE
IMPORTANT
In comparison to a 0.01 M solution of glucose, the depression in the freezing point of a 0.01 M MgCl2 solution is
MEDIUM
12th ICSE
IMPORTANT
What happens to a sodium chloride structure when high pressure is applied to it?
MEDIUM
12th ICSE
IMPORTANT
Which point defect in solids does not alter the density of the solid?
MEDIUM
12th ICSE
IMPORTANT
What type of stoichiometric defect is shown by AgCl?
MEDIUM
12th ICSE
IMPORTANT
Square planar do not show optical isomerism. Why?