divya took copper aluminium iron magnesium strip in 4 test tube and label as first second third fourth she added 10 ml of of dilute hydrochloric acid in test tube first and third and 10 ml of dilute sodium hydroxide solution in test tube second and fourth as shown below which test tube show the pop sound
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jisme HCL hai voh popup sound karega, I am a ranker with 98 per cent in board exam marks so if you have any doubt then asked me
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