Entrance Test For Biotechnology Page 18
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23112.
W hich
o ne
o f
t he
f ollowing
s tatements
i s
N OT
c orrect?
a) Carbonium
i s
p ositively
c harged
b) Carbanion
i s
n egatively
c harged
c) Carbene
i s
n egatively
c harged
d) Carbo-‐cation
i s
p ositively
c harged
113. To
a n
a queous
s olution
o f
a
c hemical,
b romine
w ater
w as
a dded
s lowly.
I nitial
discoloration
w as
f ollowed
b y
f ormation
o f
a
y ellowish-‐white
p recipitate
w as
observed.
T he
o riginal
c hemical
m ust
b e:
a) α
– naphthol
b) catechol
c) hydroquinone
d) phenol
114.
T he
n umber
o f
n eutrons
i n
t he
n ucleus
o f
t ritium
i s
a) 1
b) 2
c) 3
d) 4
115.
R ate
o f
d iffusion
o f
a
g as
i s
a) directly
p roportional
t o
i ts
d ensity
b) directly
p roportional
t o
i ts
m olecular
w eight
c) directly
p roportional
t o
t he
s quare
o f
i ts
m olecular
s ize
d) Inversely
p roportional
t o
t he
s quare
o f
i ts
m olecular
s ize
116.
A
s mall
q uantity
o f
a
c hemical
w as
h eated
i n
a
d ry
t est
t ube
t ill
i t
m elted.
A
s olid
was
o bserved
t o
f orm.
F ew
d rops
o f
a n
a lkaline
c opper
s ulphate
s olution
w as
a dded.
A
p urple
c oloration
o f
t he
l iquid
w as
o bserved.
T he
o riginal
c hemical
c ould
n ot
b e:
a) Oxamide
b) Peptide
c) Oxalic
a cid
d) Malonamide
117.
I f
w e
p ass
a
c urrent
o f
1 0.0
A
f rom
a
1 2
V
s upply
f or
3 00
s ,
t hen
t he
e nergy
s upplied
a s
h eat
i s
a) 36
k J
b) 4.0
k J
c) .4
k J
d) 360
k J
118.
G ibbs
f ree
e nergy
o f
a
s pontaneous
p rocess
i s
a) negative
b) positive
c) zero
d) can
b e
e ither
n egative
o r
p ositive
18
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