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1
JEE Main 2021 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The set in which compounds have different nature is :
A
B(OH)3 and H3PO3
B
B(OH)3 and Al(OH)3
C
NaOH and Ca(OH)2
D
Be(OH)2 and Al(OH)3
2
JEE Main 2021 (Online) 20th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
A s-block element (M) reacts with oxygen to form an oxide of the formula MO2. The oxide is pale yellow in colour and paramagnetic. The element (M) is :
A
Mg
B
Na
C
Ca
D
K
3
JEE Main 2021 (Online) 18th March Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Match List - I with List - II :

List - I List - II
(a) Be (i) treatment of cancer
(b) Mg (ii) extraction of metals
(c) Ca (iii) incendiary bombs and signals
(d) Ra (iv) windows of X-ray tubes
(v) bearings for motor engines


Choose the most appropriate answer from the option given below :
A
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
B
(a)-(iii), (b)-(iv), (c)-(v), (d)-(ii)
C
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(v)
D
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
4
JEE Main 2021 (Online) 18th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Match List - I with List - II

List - I
 List - II
(a) $$Ca{(OCl)_2}$$ (i) Antacid
(b) $$CaS{O_4}.{1 \over 2}{H_2}O$$ (ii) Cement
(c) $$CaO$$ (iii) Bleach
(d) $$CaC{O_3}$$ (iv) Plaster of paris


Choose the most appropriate answer from the options given below :
A
(a) - (i), (b) - (iv), (c) - (iii), (d) - (ii)
B
(a) - (iii), (b) - (ii), (c) - (iv), (d) - (i)
C
(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
D
(a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
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