1
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The white precipitate (Y), obtained on passing colorless and odourless gas (X) through an ammoniacal solution of NaCl, losses about 37% of its weight on heating and a white residue (Z) of basic nature is left. Identify (X), (Y) and (Z) from following sets.
A
(X) (Y) (Z)
$${N_2}$$ $${(N{H_4})_2}C{O_3}$$ $$N{H_4}Cl$$
B
(X) (Y) (Z)
$${O_2}$$ $$NaN{H_4}C{O_3}$$ $$NaHC{O_3}$$
C
(X) (Y) (Z)
$$C{O_2}$$ $$N{H_4}HC{O_3}$$ $${(N{H_4})_2}C{O_3}$$
D
(X) (Y) (Z)
$$C{O_2}$$ $$NaHC{O_3}$$ $$N{a_2}C{O_3}$$
2
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
Which structure has delocalised $$\pi$$-electrons?
A
O3
B
CO
C
HCN
D
O3 and HCN
3
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
The H3O+ ions has the following shape
A
tetrahedral
B
pyramidal
C
triangular planar
D
"T" shaped
4
WB JEE 2021
MCQ (Single Correct Answer)
+1
-0.25
Change Language
For the reaction $$_7^{14}N(\alpha ,p)\,{}^{17}O$$, 1.16 MeV (Mass equivalent = 0.00124 amu) of energy is absorbed. Mass on the reactant side is 18.00567 amu and proton mass = 1.00782 amu. The atomic mass of $${}^{17}O$$ will be
A
17.0044 amu
B
16.9991 amu
C
17.0114 amu
D
16.9966 amu
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