1
IIT-JEE 2008 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-1

Statement 1 : Pb$$^{4+}$$ compounds are stronger oxidising agents than Sn$$^{4+}$$ compounds.

and

Statement 2 : The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to 'inert pair effect'.

A
Statement 1 is True, Statement 2 is True; Statement 2 is correct explanation for Statement 1.
B
Statement 1 is True, Statement 2 is True; Statement 2 is NOT correct explanation for Statement 1.
C
Statement 1 is True, Statement 2 is False.
D
Statement 1 is False, Statement 2 is True.
2
IIT-JEE 2008 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0

There are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms large number of complexes with transition metal ions. Hybridisation easily explains the ease of sigma donation capability of NH$$_3$$ and PH$$_3$$. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is:

A
Phosphates have no biological significance in humans.
B
Between nitrates and phosphates, phosphates are less abundant in earth's crust.
C
Between nitrates and phosphates, nitrates are less abundant in earth's crust.
D
Oxidation of nitrates is possible in soil.
3
IIT-JEE 2008 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0

There are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms large number of complexes with transition metal ions. Hybridisation easily explains the ease of sigma donation capability of NH$$_3$$ and PH$$_3$$. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is :

A
Between NH$$_3$$ and PH$$_3$$, NH$$_3$$ is better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional.
B
Between NH$$_3$$ and PH$$_3$$, PH$$_3$$ is a better electron donor because the lone pair of electrons occupies sp$$^3$$ orbital and is more directional.
C
Between NH$$_3$$ and PH$$_3$$, NH$$_3$$ is a better electron donor because the lone pair of electrons occupies sp$$^3$$ orbital and is more directional.
D
Between NH$$_3$$ and PH$$_3$$, PH$$_3$$ is better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional.
4
IIT-JEE 2008 Paper 1 Offline
MCQ (Single Correct Answer)
+3
-0

There are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms large number of complexes with transition metal ions. Hybridisation easily explains the ease of sigma donation capability of NH$$_3$$ and PH$$_3$$. Phosphine is a flammable gas and is prepared from white phosphorus.

White phosphorus on reaction with NaOH gives PH$$_3$$ as one of the products. This is a:

A
dimerisation reaction
B
disproportionation reaction
C
condensation reaction
D
precipitation reaction
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