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Published on: 13/10/2020
12th Standard Chemistry English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Six
Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test

1.
Nylon 6, 6 is a _______
polyester
polyamide
formaldehyde resin
polyalkene
2.
Which of the following is not an anesthetics?
nitrous oxide
chloroform
ether
novalgin
3.
______ drugs are used in birth control pills.
Antihistamine
fertility
Antifertility
aminoglycosides
4.
Proteins which act as biological catalysts are called ________
enzymes
hormones
vitamins
polymers
5.
The free radical polymerisation of the monomer 2 - chloro buta - l,3-diene gives _______________.
Buna N
Buna S
Neoprene
PHB
6.
Mental diseases like schizophrenia are treated using _______ drugs.
tranquilizers
antacid
opioids
NSAID
7.
Sorbitol and Mannitol are________
isomers
polymers
polymers
dimers
8.
The number of asymmetric carbon atoms present in glucose is__________.
3
4
5
6
9.
________is called animal starch.
cellulose
heparin
glycogen
hyaluronic acid
10.
Denaturation does not involve
breaking up of H-bonding in proteins
the loss of biological action of enzyme
the loss of secondary structure
loss of primary structure of proteins
11.
In metal carbonyls, the oxidation state of the metal is _________.
0
+2
+4
+6
12.
On dry distillation this gives acetophenone _______.
calcium benzoate
calcium acetate and calcium benzoate
calcium acetate
calcium acetate and calcium formate
13.
Identify 'X'.
14.
Buffer index is _______.
\(\beta =\frac { dB }{ p{ K }_{ a } } \)
\(\beta =\frac { dB }{ d(pH) } \)
\(\beta =\frac { dB }{ pH } \)
\(\beta =\frac { dB }{ pOH } \)
15.
It has no α- hydrogen ______.
CH3CH2OH
CH3- CH2- CH2- OH
\({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CH } -OH\)
16.
Ethylene diamine is converted to ethylene glycol using ______.
Na2CO3 solution
Nitrous acid
NaHCO3 (aqueous)
Baeyer's reagent
17.
Fog is a colloidal solution of _______.
gas in liquid
liquid in gas
gas in solid
solid in gas
18.
CH3CH2 Br \(\overset { aqNaOH }{ \underset { \Delta }{ \longrightarrow } } A\overset { { KMnO }_{ 4 }{ /H }^{ + } }{ \underset { \Delta }{ \longrightarrow } } B\overset { { NH }_{ 3 } }{ \underset { \Delta }{ \longrightarrow } } C\overset { { Br }_{ 2 }/NaOH }{ \longrightarrow } D\) D' is________.
bromomethane
α - bromo sodium acetate
methanamine
acetamide
19.
Identify the product formed in the reaction
20.
\({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.
Formaldelyde
di acetone ammonia
hexamethylene tetraamine
oxime
21.
What would be the activation energy of a reaction when the temperature is increased from 27oC to 37oC?
534 kJ mol-1
53.4 kJ mol-1
5.34 kJ mol-1
None of these
22.
If 'a' is the length of unit cell, then which one is correct relationship?
For simple cubic lattice, radius of metal atom =\(\frac{a}{2}\)
For bee lattice, radius of metal atom \(=\frac { \sqrt { 3a } }{ 4 } \)
For fcc lattice, radius of metal atom \(=\frac { a }{ 2\sqrt { 2 } } \)
All of these
23.
Which one is correct statement for zeolite?
Zeolites are aluminosilicates having three dimensional framework
Hydrate zeolites are used as ion exchangers in hardening of soft water
Zeolites are alumino silicates
all the above
24.
25.
Assertion: Rate of reaction doubles when the concentration of the reactant is doubles if it is a first order reaction.
Reason: Rate constant also doubles
Codes:
a) Both assertion and reason are true and reason is the correct explanation of assertion.
b) 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.
Both assertion and reason are true and reason is the correct explanation of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false
Both assertion and reason are false.
1.
(b)
polyamide
2.
(d)
novalgin
3.
(c)
Antifertility
4.
(a)
enzymes
5.
(c)
Neoprene
6.
(a)
tranquilizers
7.
(c)
polymers
8.
(b)
4
9.
(c)
glycogen
10.
(d)
loss of primary structure of proteins
11.
(a)
0
12.
(b)
calcium acetate and calcium benzoate
13.
(c)
14.
(b)
\(\beta =\frac { dB }{ d(pH) } \)
15.
(d)
16.
(b)
Nitrous acid
17.
(d)
solid in gas
18.
(c)
methanamine
19.
20.
X - HCHO
Y - (CH2)6N4
21.
(d)
None of these
22.
(d)
All of these
23.
(d)
all the above
24.
(c)
25.
c) Assertion is true but reason is false
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