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


1. The most reactive among the halogens is [1997]


2. Which one of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torch lights, electric shaver etc? [1995]


3. The alpha particle carries two positive charge. Its mass is very nearly equal to that of [1996]


4. Match List I with List II and select the correct answer using the codes given below the lists: [2001]
List-1 (Characteristic)
A. Zero mass
B. Fractional charge
C. Fractional spin
D. Integral spin
List-II (Particle)
1. Positron
2. Neutrino
3. Quark
4. Photon
Codes:


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



6. Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because [1999]


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


9. Which one of the following is not an essential micronutrient for plants? [1996]


10. With reference to ionic compounds, consider the following statements: [2003]
1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are good conductor of electricity.
Which of these statements is/are correct?


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