1
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
Select the mismatch :
A
Rhodospirillum - Mycorrhiza
B
Anabaena - Nitrogen fixer
C
Rhizobium - Alfalfa
D
Frania - Alnus
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survise without oxygen?
A
Pseudomonas
B
Mycoplasma
C
Nostoc
D
Bacillus
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
Which one is the wrong statement ?
A
The uncertainty principle is

$$\Delta E \times \Delta t \ge {h \over {4\pi }}$$
B
Half filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement.
C
The energy of 2s-orbital is less than the energy of 2p-orbital in case of hydrogen like atoms.
D
de-Broglie's wavelength is given by

$$\lambda = {h \over {mv}}$$, where m = mass of the particle,

v $$=$$ group velocity of the particle.
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Change Language
Match the interhalogen compounds of column-I with the geometry in column-II and assign the correct code.

Column $${\rm I}$$ Column $${\rm I}$$$${\rm I}$$
(A) XX' (i) T-shape
(B) XX'3 (ii) Pentagonal bipyramidal
(C) XX'5 (iii) Linear
(D) XX'7 (iv) Square pyramidal
(v) Tetrahedral
A
(A) $$ \to $$ (iii);  (B) $$ \to $$ (i);  (C) $$ \to $$ (iv);  (D) $$ \to $$ (ii)
B
(A) $$ \to $$ (v);  (B) $$ \to $$ (iv);  (C) $$ \to $$ (iii);  (D) $$ \to $$ (ii)
C
(A) $$ \to $$ (iv);  (B) $$ \to $$ (iii);  (C) $$ \to $$ (ii);  (D) $$ \to $$ (i)
D
(A) $$ \to $$ (iii);  (B) $$ \to $$ (iv);  (C) $$ \to $$ (i);  (D) $$ \to $$ (ii)