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Published on: 28/05/2021
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Questions + Answers key
Take MCQ Chemistry Test1.
Consider the following reaction, ethanol \(\overset{PCl_5}\longrightarrow\) X \(\overset{alc.KOH}\longrightarrow\) Y \(\overset{H_2SO_4}{\underset {(ii)H_2O,room temperature}{\longrightarrow}}\) Z The product Z is:
CH3CH2 - O - CH2CH3
CH3CH2 - O-SO3H
CH3CH2OH
CH2 = CH2
2.
Which of the following carbonyls will have the strongest C-O bond?
\({ MN(CO) }_{ 6 }^{ + }\)
Cr(CO)6
\({ V(CO) }_{ 6 }^{ - }\)
Fe(CO)5
3.
Of the following acids, the one which has the capability to form complex compound and also possesses oxidising and reducing properties is
HNO3
HNO2
HCOOH
HCN
4.
The brown ring test for nitrates depends upon
the reduction of nitrate to nitric oxide
oxidation of nitric oxide to nitrogen dioxide
reduction of ferrous sulphate to iron
oxidising action of sulphuric acid
5.
Reaction of HNO3 with I, S, P and C gives respectivevly
HIO3, H2SO4, H3PO4 and CO2
HIO3, H2SO4, H3PO3 and CO2
I2O5, H2SO4, H3PO4 and CO
I 2O5, SO2, P2O5 and CO2
6.
Nitric acid can be obtained from ammonia via the formation of the intermediate compounds
nitric oxide and nitrogen dioxide
nitrogen and nitric oxide
nitric oxide and dinitrogen pentoxide
nitrogen and nitrous oxide
7.
A gaseous substance dissolves in water giving a pale blue solution which decolourises KMnO4 and oxidises KI to I2 . Gaseous substance is
N2O5
NH3
N2O3
HNO3
8.
Which statement is wrong for NO?
It is anhydride of nitrous acid
Its dipole moment is 0.22 D
It forms dimer
It is paramagnetic
9.
The gases produced in the reaction, Pb(NO3)2 \(\overset{\triangle}{\longrightarrow}\) and NH4NO3 \(\overset{\triangle}{\longrightarrow}\) are respectively
N2O, NO
N2O, NO2
NO, NO2
NO2,N2O
10.
An inorganic salt (A) is decomposed on heating to give two products (B) and (C). Compound (C) is a liquid at room temperature and is neutral to litmus while compound (B) is a colourless neutral gas. Compounds (A), (B) and (C) are
NH4NO3, N2O,H2O
NH4NO2,NO,H2O
CaO, HO, CaCI 2O, CaCI2
Ba(NO3)2, H2O, NO2
Mg(NO3)2, N2O5, H2O
1.
(c)
CH3CH2OH
2.
(a)
\({ MN(CO) }_{ 6 }^{ + }\)
3.
(b)
HNO2
4.
(a)
the reduction of nitrate to nitric oxide
5.
(a)
HIO3, H2SO4, H3PO4 and CO2
6.
(a)
nitric oxide and nitrogen dioxide
7.
(c)
N2O3
8.
(a)
It is anhydride of nitrous acid
9.
(d)
NO2,N2O
10.
(a)
NH4NO3, N2O,H2O
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