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Published on: 01/06/2021
QB365 provides detailed and simple solution for every Book back Questions in class 12 Chemistry Subject. It will helps to get more idea about question pattern in every book back questions with solution.
Download Tamil Nadu 12th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test1.
Which one of the following is not feasible
Zn(s) + Cu2+(aq) \(\rightarrow\) Cu(s) + Zn2+(aq)
Cu(s)+ Zn2+(aq)\(\rightarrow\) Zn(s) + Cu2+(aq)
Cu(s) + 2Ag+(ag)\(\rightarrow\) 2Ag(s) + Cu2+(aq)
Fe(s) + Cu2+(aq) \(\rightarrow\) Cu(s)+ Fe2+(aq)
2.
Match items in column - I with the items of column – II and assign the correct code.
| Column-I | Column-II | ||
| A. | Cyanide process | (i) | Ultrapure Ge |
| B | Froth floatation process | (ii) | Dressing of ZnS |
| C | Electrolytic reduction | (iii) | Extraction of Al |
| D | Zone refining | (iv) | Extraction of Au |
| (v) | Purification of Ni | ||
| A | B | C | D |
| (i) | (ii) | (iii) | (iv) |
| A | B | C | D |
| (iii) | (iv) | (v) | (i) |
| A | B | C | D |
| (iv) | (ii) | (iii) | (i) |
| A | B | C | D |
| (ii) | (iii) | (i) | (v) |
3.
Which of the metal is extracted by Hall-Heroult process?
Al
Ni
Cu
Zn
4.
Which one of the following reaction represents calcinations?
\(2Zn+{ O }_{ 2 }\rightarrow 2ZnO\)
\(2ZnS+3O_{ 2 }\rightarrow 2ZnO+2SO_{ 2 }\)
\(MgCO_{ 3 }\rightarrow MgO+CO_{ 2 }\)
Both (a) and (c)
5.
Bauxite has the composition ______.
Al2O3
Al2O3.nH2O
Fe2O3.2H2O
None of these
1.
(b)
Cu(s)+ Zn2+(aq)\(\rightarrow\) Zn(s) + Cu2+(aq)
2.
(c)
| A | B | C | D |
| (iv) | (ii) | (iii) | (i) |
3.
(a)
Al
4.
(c)
\(MgCO_{ 3 }\rightarrow MgO+CO_{ 2 }\)
5.
(b)
Al2O3.nH2O
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