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TN State Board
TN 12th Standard
Chemistry
TEST : 25
TN State Board
TN 12th Standard
Chemistry
UNIT 10: Surface Chemistry
Prepare / Learn
Q1.
Adsorption of a gas on solid metal surface is spontaneous and exothermic, then
A.
∆H increases
B.
∆S increases
C.
∆G increases
D.
∆S decreases
View Solution
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Answer :
Option D
Explaination / Solution:
∆S is –ve
TN State Board
TN 12th Standard
Chemistry
Unit III: p-Block Elements II
Prepare / Learn
Q2.
Which of the following is strongest acid among all?
A.
HI
B.
HF
C.
HBr
D.
HCl
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Chemistry
UNIT 11: Hydroxy Compounds and Ethers
Prepare / Learn
Q3.
Which of the following compound can be used as artifreeze in automobile radiators?
A.
methanol
B.
ethanol
C.
Neopentyl alcohol
D.
ethan -1, 2-diol
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Chemistry
Unit IV: Transition and Inner Transition Elements
Prepare / Learn
Q4.
The number of moles of acidified KMnO
4
required to oxidize 1 mole of ferrous oxalate(FeC
2
O
4
) is
A.
5
B.
3
C.
0.6
D.
1.5
View Solution
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Answer :
Option C
Explaination / Solution:
TN State Board
TN 12th Standard
Chemistry
UNIT 12: Carbonyl Compounds and Carboxylic Acids
Prepare / Learn
Q5.
Assertion : p – N, N – dimethyl aminobenzaldehyde undergoes benzoin condensation
Reason : The aldehydic (-CHO) group is meta directing
A.
if both assertion and reason are true and reason is the correct explanation of assertion.
B.
if both assertion and reason are true but reason is not the correct explanation of assertion.
C.
assertion is true but reason is false
D.
both assertion and reason are false.
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Answer :
Option B
Explaination / Solution:
TN State Board
TN 12th Standard
Chemistry
Unit V: Coordination Chemistry
Prepare / Learn
Q6.
Formula of tris(ethane-1,2-diamine)iron(II)phosphate
A.
[Fe(CH
3
-CH(NH
2
)
2
)
3
](PO
4
)
3
B.
[Fe(H
2
N-CH
2
-CH
2
-NH
2
)
3
)](PO
4
)
C.
[Fe(H
2
N-CH
2
-CH
2
-CH
2
-NH
2
)
3
](PO
4
)
2
D.
[Fe(H
2
N-CH
2
-CH
2
-NH
2
)
3
]
3
(PO
4
)
2
View Solution
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Answer :
Option D
Explaination / Solution:
[Fe (en )
3
]
2+
(PO
4
3-
)
TN State Board
TN 12th Standard
Chemistry
UNIT 13: Organic Nitrogen Compounds
Prepare / Learn
Q7.
Which of the following amines does not undergo acetylation?
A.
t – butylamine
B.
ethylamine
C.
diethylamine
D.
triethylamine
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Answer :
Option D
Explaination / Solution:
triethyl amine ( 3 amine)
TN State Board
TN 12th Standard
Chemistry
Unit VI: Solid State
Prepare / Learn
Q8.
The yellow colour in NaCl crystal is due to
A.
excitation of electrons in F centers
B.
reflection of light from Cl
-
ion on the surface
C.
refraction of light from Na
+
ion
D.
all of the above
View Solution
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Answer :
Option A
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Chemistry
UNIT 14: Biomolecules
Prepare / Learn
Q9.
Which of the following vitamins is water soluble?
A.
Vitamin E
B.
Vitamin K
C.
Vitamin A
D.
Vitamin B
View Solution
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Answer :
Option D
Explaination / Solution:
No Explaination.
TN State Board
TN 12th Standard
Chemistry
Unit VII: Chemical Kinetics
Prepare / Learn
Q10.
The rate constant of a reaction is
5.8 × 10
−2
s
−1
. The order of the reaction is
A.
First order
B.
zero order
C.
Second order
D.
Third order
View Solution
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Answer :
Option A
Explaination / Solution:
The unit of rate constant is s-1 and it indicates that the reaction is first order.
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TN State Board
TN 12th Standard
Chemistry
TEST : 25
Chemistry
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Unit I: Metallurgy
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Unit II: p-Block Elements I
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Unit III: p-Block Elements II
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Unit IV: Transition and Inner Transition Elements
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Unit V: Coordination Chemistry
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Unit VI: Solid State
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Unit VII: Chemical Kinetics
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UNIT 8: Ionic Equilibrium
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UNIT 9: Electro Chemistry
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UNIT 10: Surface Chemistry
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UNIT 11: Hydroxy Compounds and Ethers
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UNIT 12: Carbonyl Compounds and Carboxylic Acids
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UNIT 13: Organic Nitrogen Compounds
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UNIT 14: Biomolecules
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UNIT 15: Chemistry in Everyday Life
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