SSC CPO 2018 Chemistry GK PDF Download :- 21 Questions
Exam was conducted from 12 March to 16 March 2019
Q.3:- Which of the following elements/chemical compounds has the highest density?
निम्नलिखित में से किस तत्व / रासायनिक यौगिक में सबसे अधिक घनत्व होता है? [13 March 2019 Eve Shift] 1. Zinc
Ans :- Osmium
Comment :- The first chemical element with the lowest density is Hydrogen and the highest density is Osmium.
Osmium is a chemical element with symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores
Q.4:- ______________is one of the most important technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates.
______________ एक मिश्रण के पृथक्करण के लिए सबसे महत्वपूर्ण तकनीक है जो इसे घोल या सस्पेन्शन के माध्यम में से पारित करती है जिसमें घटक अलग-अलग दरों पर चलते हैं। [13 March 2019 Morng Shift] 1. Filtration
Comment:- Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a structure holding another material called the stationary phase. The various constituents of the mixture travel at different speeds, causing them to separate.
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