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1
JEE Main 2022 (Online) 24th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
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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
Out of Syllabus
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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 Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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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
4
JEE Main 2021 (Online) 31st August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Lithium salts are hydrated.

Reason (R) : Lithium has higher polarising power than other alkali metal group members.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
B
(A) is correct but (R) is not correct.
C
(A) is not correct but (R) is correct.
D
Both (A) and (R) are correct and (R) is the correct explanation of (A)
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