Chemistry (Civil Service Examination), Questions and Answers, GK for UPSC, Bank PO & All Exams

1. Match List-I (Oxidation number) with List II (The element) and select the correct answer using the codes given below the lists: [2002]
List-I - List-II
(Oxidation number) - (The elements)
A. 2 - 1. Oxidation number of Mn in MnO2
B. 3 - 2. Oxidation number of S in H2S2O7
C. 4 - 3. Oxidation number of Ca in CaO
D. 6 - 4. Oxidation number of Al in NaAIH4 Codes:

2. Most of the explosions in mines occur due to the mixing of

3. The chemical used as a 'fixer'in photography is [1995]

4. Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance? [1996]

5. Assertion (A) : Large cold storage plants use ammonia as refrigerant while domestic refrigerators use chlorofluorocarbons.
Reason (R) : Ammonia can be liquefied at ambient temperature and low pressure. [2000]

6. Aluminium surface are often 'anodized'. This means the deposition of a layer of [2000]

7. Consider the following statements with reference to the periodic table of chemical elements: [2001]
1. Ionisation potential gradually decreases along a period
2. In a group of elements, electron affinity decreases as the atomic weight increases
3. In a given period, electronegativity decreases as the atomic number increases
Which of these statement (s) is/are correct?

8. Assertion: Synthetic detergents can lather well in hard water.
Reason (R): Synthetic detergents form soluble calcium and magnesium salts with hard water. [2002]

9. Which one of the following statements is NOT correct? [2003]

10. Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?

General Knowledge

1. World Geography -Test-01
2. World Geography -Test-02
3. World Geography -Test-03
4. Geography of India -Test-01
5. Geography of India -Test-02
6. Geography of India -Test-03
7. Geography of India -Test-04
8. Geography of India -Test-05
9. History of India - Test - 01
10. History of India - Test - 02
11. History of India - Test - 03
12. History of India - Test - 04
13. History of India - Test - 05
14. History of India - Test - 06
15. History of India - Test - 07
16. INM-Test-01
17. INM-Test-02
18. INM-Test-03
19. INM-Test-04
20. INM-Test-05
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