1
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
If Avogadro number NA, is changed from 6.022 $$ \times $$ 1023 mol$$-$$1 to 6.022 $$ \times $$ 1020 mol$$-$$1, this would change
A
the mass of one mole of carbon
B
the ratio of chemical species to each other in a balanced equation
C
the ratio of elements to each other in a compound
D
the definition of mass in units of grams.
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
Which is the correct order of increasing energy of the listed orbitals in the atom of titanium ? (At. no. Z = 22)
A
4s 3s 3p 3d
B
3s 3p 3d 4s
C
3s 3p 4s 3d
D
3s 4s 3p 3d
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
Decreasing order of stability of O2, O2$$-$$, O2+ and O22$$-$$ is
A
O22$$-$$  >  O2$$-$$  >  O2  >  O2+
B
O2  >  O2+  >  O22$$-$$  >  O2$$-$$
C
O2$$-$$  >  O22$$-$$  >  O2+  >  O2
D
O2+  >  O2  >  O2$$-$$  >  O22$$-$$
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
In which of the following pairs, both the species are not isostructural ?
A
Diamond, Silicon carbide
B
NH3, PH3
C
XeF4, XeO4
D
SiCl4, PCl4+