1
JEE Main 2022 (Online) 24th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In the industrial production of which of the following, molecular hydrogen is obtained as a byproduct?

A
NaOH
B
NaCl
C
Na metal
D
Na2CO3
2
JEE Main 2022 (Online) 24th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which one of the following compounds is used as a chemical in certain type of fire extinguishers?

A
Baking soda
B
Soda ash
C
Washing soda
D
Caustic soda
3
JEE Main 2022 (Online) 24th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?

A
Cu2+
B
Sr2+
C
Ba2+
D
Ca2+
4
JEE Main 2022 (Online) 24th June Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following statements are correct?

(A) Both LiCl and MgCl2 are soluble in ethanol.

(B) The oxides Li2O and MgO combine with excess of oxygen to give superoxide.

(C) LiF is less soluble in water than other alkali metal fluorides.

(D) Li2O is more soluble in water than other alkali metal oxides.

Choose the most appropriate answer from the options given below :

A
(A) and (C) only
B
(A), (C) and (D) only
C
(B) and (C) only
D
(A) and (D) only
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