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1
JEE Main 2022 (Online) 28th June Morning Shift
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-1
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Dihydrogen reacts with CuO to give :

A
CuH2
B
Cu
C
Cu2O
D
Cu(OH)2
2
JEE Main 2022 (Online) 26th June Evening Shift
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Boiling of hard water is helpful in removing the temporary hardness by converting calcium hydrogen carbonate and magnesium hydrogen carbonate to :

A
CaCO3 and Mg(OH)2
B
CaCO3 and MgCO3
C
Ca(OH)2 and MgCO3
D
Ca(OH)2 and Mg(OH)2
3
JEE Main 2022 (Online) 26th June Morning Shift
MCQ (Single Correct Answer)
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-1
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Consider the following reaction:

$$2HSO_4^ - (aq)\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{(2)\,Hydrolysis}^{(1)\,Electrolysis}} 2HSO_4^ - + 2{H^ + } + A$$

The dihedral angle in product A in its solid phase at 110 K is :

A
104$$^\circ$$
B
111.5$$^\circ$$
C
90.2$$^\circ$$
D
111.0$$^\circ$$
4
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
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The highest industrial consumption of molecular hydrogen is to produce compounds of element :

A
Carbon
B
Nitrogen
C
Oxygen
D
Chlorine
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