1. ASSERTION : The number of tetrahedral voids is double the number of octahedral voids. REASON : The size of the tetrahedral voids is half of that of the octahedral void.
Correct!
Wrong!
2. ASSERTION : The molality of the solution does not change with change in temperature. REASON : The molality is expressed in units of moles per 1000 g of solvent.
Correct!
Wrong!
3. ASSERTION : Atom with high value of ionization potential always have loosely bound valence electrons. REASON : Ionization potential is the energy required to gain an electron from an isolated gaseous atom.
Correct!
Wrong!
4. ASSERTION : At critical point, the densities of substance in gaseous and liquid states are same. REASON : Critical temperature is the temperature at which the real gas exhibits ideal behaviour for considerable range of pressure.
Correct!
Wrong!
5. ASSERTION : Bending of Sn produces sound, phenomenon being known as tin cry. REASON : Cooling tin below 15.2° C, it changes to grey powder.
Correct!
Wrong!
6. ASSERTION : Acetylene on reacting with sodamide gives sodium acetylide and ammonia. REASON : sp-Hybridised carbon atoms of acetylene are considerably electronegative.
Correct!
Wrong!
7. ASSERTION : H2S is stronger acid than PH3. REASON : S is more electronegative than P, conjugate base HS– is more stable than H2P–.
Correct!
Wrong!
8. ASSERTION : Aqueous solution of potassium ferrocyanide does not give the test of iron (II). REASON : Potassium ferrocyanide is not poisonous like potassium cyanide.
Correct!
Wrong!
9. ASSERTION : An alcohol does not react with halide ions as such but on dissolution in strong acids it does react smoothly forming an alkyl halide. REASON : The strong acid accelerates the removal of proton from the –OH group of the alcohol.
Correct!
Wrong!
10. ASSERTION : Nitration of aniline can be done conveniently by protecting the amino group by acetylation. REASON : Acetylation increases the electron density in the benzene ring.
Correct!
Wrong!
Chemistry Day-9
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