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1
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The element used for welding metals with high melting points is

A
He
B
Cl2
C
H2
D
Ne
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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CaCl2 and Ca(OCl)2 are components of

A
Lime water
B
Gypsum
C
Portland cement
D
Bleaching powder
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Which one of the following is not a calcination reaction?

A
CaCO3 + 2HCl $$\buildrel \Delta \over \longrightarrow $$ CaCl2 + H2O + CO2
B
ZnCO3 $$\buildrel \Delta \over \longrightarrow $$ ZnO + CO2
C
Fe2O3 . xH2O $$\buildrel \Delta \over \longrightarrow $$ Fe2O3 + xH2O
D
CaCO3 . MgCO3 $$\buildrel \Delta \over \longrightarrow $$ CaO + MgO + 2CO2
4
NEET 2022 Phase 1
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Identify the incorrect statement from the following

A
Alkali metals react with water to form their hydroxides.
B
The oxidation number of K in KO2 is +4.
C
Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
D
Lithium is the strongest reducing agent among the alkali metals.
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