1
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Which statement is wrong?
A
Beryl is an example of cyclic silicate.
B
Mg2SiO4 is orthosilicate.
C
Basic structural unit in silicates is the SiO4 tetrahedron.
D
Feldspars are not aluminosilicates.
2
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Identify the incorrect statement, regarding the molecule XeO4 :
A
XeO4 molecule is square planar.
B
There are four p$$\pi $$ - d$$\pi $$ bonds.
C
There are four sp3 - p, $$\sigma $$ bonds.
D
XeO4 molecule is tetrahedral.
3
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The metal oxide which cannot be reduced to metal by carbon is
A
Al2O3
B
PbO
C
ZnO
D
Fe2O3
4
NEET 2013 (Karnataka)
MCQ (Single Correct Answer)
+4
-1
Sc (Z = 21) is a transition element but Zn (Z = 30) is not because
A
both Sc3+ and Zn2+ ions are colourless and form white compounds.
B
in case of Sc, 3d orbitals are partially filled but in Zn these are filled.
C
last electron is assumed to be added to 4s level in case of Zn.
D
both Sc and Zn do not exhibit variable oxidation states.
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