1
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
A group of 15 element, which is a metal and forms a hydride with strongest reducing power among group 15 hydrides. The element is :
A
As
B
Sb
C
Bi
D
P
2
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Match List - I with List - II :

List - I
Name of oxo acid
List - II
Oxidation state of 'P'
(a) Hypophosphorous acid (i) +5
(b) Orthophosphoric acid (ii) +4
(c) Hypophosphoric acid (iii) +3
(d) Orthophosphorous acid (iv) +2
(v) +1


Choose the correct answer from the options given below :
A
(a) - (iv), (b) - (v), (c) - (ii), (d) - (iii)
B
(a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
C
(a) - (v), (b) - (i), (c) - (ii), (d) - (iii)
D
(a) - (v), (b) - (iv), (c) - (ii), (d) - (iii)
3
JEE Main 2021 (Online) 26th February Evening Shift
MCQ (Single Correct Answer)
+4
-1
Which pair of oxides is acidic in nature?
A
CaO, SiO2
B
B2O3, CaO
C
B2O3, SiO2
D
N2O, BaO
4
JEE Main 2021 (Online) 26th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Find A, B and C in the following reactions :

$$N{H_3} + A + C{O_2} \to {(N{H_4})_2}C{O_3}$$

$${(N{H_4})_2}C{O_3} + {H_2}O + B \to N{H_4}HC{O_3}$$

$$N{H_4}HC{O_3} + NaCl \to N{H_4}Cl + C$$
A
$$A - {O_2};B - C{O_2};C - N{a_2}C{O_3}$$
B
$$A - {H_2}O;B - {O_2};C - NaHC{O_3}$$
C
$$A - {H_2}O;B - {O_2};C - N{a_2}C{O_3}$$
D
$$A - {H_2}O;B - C{O_2};C - NaHC{O_3}$$
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