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Published on: 05/11/2020
12th Standard Chemistry English Medium Free Online Test 1 Mark Questions 2020 - Part Ten
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
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1.
Glyptal is a polymer of _______
ethylene glycol and terypthaliic acid
ethylene glycol and pthalic acid
adipic acid and hexamethelene diamine
phenol and formaldehyde
2.
Oxidation of fats and oils is prevented by ____________.
BHT(Butyl hydroxy toluene)
BHA(Butyl hydroxy anisole)
Both (a) and (b)
Neither (a) nor (b)
3.
Nitrobenzene on electrolytic reduction in con. sulphuric acid, the intermediate formed is
C6H5NH - NHC6H5
C6H5 - NHOH
C6H5 - N = N - C6H5
C6H5HSO4
4.
Which one of the following is employed as antihistamine?
azithromycin
ciprofloxacin
cetirizine
neomycin
5.
Carbohydrates are
polyhydroxy aldehydes
polyhydroxy ketones
polyhydroxy acids
both (a) and (b)
6.
Which among the following contains triglyceride?
Wax
Cooking oil
Essential oil
Albumin
7.
The laws of electrolysis were enunciated first by
Dalton
Faraday
Kekule
Avogadro
8.
A compound 'X' when mixed with ethanol and a drop of concentrated H2SO4 gave a compound with fruity odour. Identify 'X'.
HCHO
CH3OH
CH3COOH
CH3NH2
9.
Addition of sodium chloride to a saturated solution of silver chloride _______.
dissociation of AgCI increases
concentration of CI- decreases
dissociation of AgCl- decreases
concentration of Ag+ increases
10.
Which has the highest boiling point?
CH3CH3
CH3OH
C2H5OH
C3H5
11.
Auto catalysis is observed in the reaction given below.
CH3COOC2H5+H2O➝ CH3COOH+C2H5OH
CH3COOC2H5
H2O
CH3COOH
C2H5OH
12.
13.
Which one of the following is not produced by body?
DNA
Enzymes
Hormones
Vitamins
14.
P Product ‘P’ in the above reaction is _______.
15.
\({ CH }_{ 2 }={ CH }_{ 2 }\overset { i){ O }_{ 3 } }{ \underset { zn/{ H }_{ 2 }O }{ \longrightarrow } } X\overset { { NH }_{ 3 } }{ \longrightarrow } Y \ 'Y'\) is _______.
Formaldelyde
di acetone ammonia
hexamethylene tetraamine
oxime
16.
The correct IUPAC name of the compound
4 – chloro – 2,3 – dimethyl pentan – 1-ol
2,3 – dimethyl – 4- chloropentan -1-ol
2,3,4 – trimethyl – 4- chlorobutan -1-ol
4– chloro – 2,3,4 – trimethyl pentan – 1-ol
17.
Faraday constant is defined as_______.
charge carried by 1 electron
charge carried by one mole of electrons
charge required to deposit one mole of substance
charge carried by 6.22 ×1010 electrons
18.
Hot concentrated H2SO4 is moderately strong oxidising agent which of the following reactions does not show oxidising behaviour?
\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)
\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)
\(Cu+2H_{ 2 }{ SO }_{ 4 }\longrightarrow { CuSO }_{ 4 }+{ SO }_{ 2 }+{ 2H }_{ 2 }O\)
\({ CaF }_{ 2 }+{ H }_{ 2 }SO_{ 4 }\longrightarrow { CaCO }_{ 4 }+2HF\)
19.
If the initial concentration of the reactant is doubled, the time for half reaction is also doubled. Then the order of the reaction is______.
Zero
one
Fraction
none
20.
The crystal with a metal deficiency defect is ________.
NaCl
FeO
ZnO
KCl
21.
Solid CO2 is an example of ________.
Covalent solid
metallic solid
molecular solid
ionic solid
22.
Which of the following lanthanoid ions is diamagnetic?
Eu2+
Yb2+
Ce2+
Sm2+
23.
AlF3 is soluble in HF only in the presence of KF. It is due to the formation of _________.
K3[AIF3H3]
K3[AiF6]
AIH3
K[AIF3H]
24.
On oxidation with iodine, sulphite ion is transformed to _______.
S4O62-
S2O62-
SO42-
SO32-
25.
In the extraction of aluminium from alumina by electrolysis, cryolite is added to_______.
Lower the melting point of alumina
Remove impurities from alumina
Decrease the electrical conductivity
Increase the rate of reduction
1.
(b)
ethylene glycol and pthalic acid
2.
(c)
Both (a) and (b)
3.
(b)
C6H5 - NHOH
4.
(c)
cetirizine
5.
(d)
both (a) and (b)
6.
(b)
Cooking oil
7.
(b)
Faraday
8.
(c)
CH3COOH
9.
(c)
dissociation of AgCl- decreases
10.
(c)
C2H5OH
11.
(c)
CH3COOH
12.
(d)
13.
(d)
Vitamins
14.
(b)
15.
X - HCHO
Y - (CH2)6N4
16.
(a)
4 – chloro – 2,3 – dimethyl pentan – 1-ol
17.
IF = 96500 C = charge of one mole of e- charge of 6.022 x 10-23 electron
18.
(d)
\({ CaF }_{ 2 }+{ H }_{ 2 }SO_{ 4 }\longrightarrow { CaCO }_{ 4 }+2HF\)
19.
t1/2 α \(\frac{1}{[A_{0}]^{n-1}}\)...(1)
If [A0 = 2[A0]; then t1/2 = 2t1/2
2t1/2 α \(\frac{1}{[2A_{0}]^{n-1}}\)...(2)
(2)/(1) = \(2= \frac{1}{[2A_{0}]^{n-1}} \times \frac{1}{[A_{0}]^{n-1}}\)
\(2= \frac {[2A_{0}]^{n-1}} {[A_{0}]^{n-1}}\)
\(2= \frac {1} {2}^{n-1}\)
2 = (2-1)n-1
21 = (2-n+1)
n = 0
20.
(b)
FeO
21.
Lattice points are occupied by CO2 molecules
22.
Yb2+ - 4f14 - no unpaired electrons - diamagnetic
23.
(b)
K3[AiF6]
24.
(c)
SO42-
25.
(a)
Lower the melting point of alumina
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