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1
NEET 2023
MCQ (Single Correct Answer)
+4
-1
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Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in presence of calcium oxide is :

A
32
B
30
C
18
D
16
2
NEET 2022 Phase 2
MCQ (Single Correct Answer)
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-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
3
NEET 2022 Phase 2
MCQ (Single Correct Answer)
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-1
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CaCl2 and Ca(OCl)2 are components of

A
Lime water
B
Gypsum
C
Portland cement
D
Bleaching powder
4
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
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