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Hydrogen

Question
CBSEENCH11006873
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Give examples showing electropositive character of hydrogen.

Solution
(i) It combines with electronegative elements to form covalent compounds e.g., H2O, H2S, HF, NH3 etc.
(ii) When an aqueous solution of HCl or acidulated water is electrolyzed, hydrogen is liberated at the cathode showing that it is present as H+ ions in solution.
                   HCl space space rightwards harpoon over leftwards harpoon space space space straight H to the power of plus space plus space Cl to the power of minus At space cathode colon space space space space straight H to the power of plus space plus space straight e to the power of minus space space space rightwards arrow space space space straight H space space space space open square brackets Primary space change close square brackets space space space space straight H space space plus space straight H space space space rightwards arrow space space space space straight H subscript 2 space space space space left square bracket Secondary space change right square bracket space space space space space space space space space space space space space space space space space space space space space space space space space space space left parenthesis Cathode right parenthesis

Some More Questions From Hydrogen Chapter

Give laboratory Preparation of Dihydrogen ?

Name the substances in which hydrogen exhibits 0 and -1 oxidation states.

Name one isotope of hydrogen which has no neutron.

Which isotope of hydrogen is used as a tracer in organic reactions ?

Hydrogen is the lightest gas. Still its use in filling balloons has been discarded. Why?

Hydrogen forms both H+ ion and H- ion. Explain.

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