1
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
In the given transformation, which of the following is the most appropriate reagent ?

AIEEE 2012 Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 185 English
A
$$N{H_2}N{H_2},\mathop {OH}\limits^\Theta $$
B
$$Zn - Hg/HCl$$
C
$$Na,Liq\,N{H_3}$$
D
$$NaB{H_4}$$
2
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
In a $$\Delta PQR,{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} $$ If $$3{\mkern 1mu} \sin {\mkern 1mu} P + 4{\mkern 1mu} \cos {\mkern 1mu} Q = 6$$ and $$4\sin Q + 3\cos P = 1,$$ then the angle R is equal to :
A
$${{5\pi } \over 6}$$
B
$${{\pi } \over 6}$$
C
$${{\pi } \over 4}$$
D
$${{3\pi } \over 4}$$
3
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
If $$z \ne 1$$ and $$\,{{{z^2}} \over {z - 1}}\,$$ is real, then the point represented by the complex number z lies :
A
either on the real axis or a circle passing through the origin.
B
on a circle with centre at the origin
C
either on real axis or on a circle not passing through the origin.
D
on the imaginary axis.
4
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
The equation $${e^{\sin x}} - {e^{ - \sin x}} - 4 = 0$$ has:
A
infinite number of real roots
B
no real roots
C
exactly one real root
D
exactly four real roots
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