Which salt gives a basic solution (turns red litmus blue)

The same question, asked 7 times: 2 May 2023 S1, 11 May 2023 S1, 11 May 2024 S1, 20 Apr 2025 S2, 23 Apr 2025 S1, 25 Apr 2025 S2, 26 Apr 2025 S2. Every wording below, oldest first.

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Question 1
2 May 2023 S1
83 $Which of the following salt solutions turns red litmus blue?$
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Question 2
11 May 2023 S1
97 $Which among the following salts turns red litmus blue in its aqueous solution?$
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Question 3
11 May 2024 S1
63 $Which of the following salts turns red litmus blue in its aqueous solution?$
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Question 4
20 Apr 2025 S2
60 $Which among the following salts turns red litmus blue in its aqueous solution?$
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Question 5
23 Apr 2025 S1
51 $Which among the following salts forms basic solution in water?$
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Question 6
25 Apr 2025 S2
51 $Which among the following salts forms basic solution when dissolved in water?$
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Question 7
26 Apr 2025 S2
62 $Which among the following salts turns red litmus blue in its aqueous solution?$
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Which salt gives a basic solution (turns red litmus blue)

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