Q. A mixture of sand and naphthalene can be separated by -
1) sublimation
2) distillation
3) chromatography
4) fractional distillation
Q. The pH of a solution changes from 3 to 6. The H+ ion concentration will -
1) increase 3 times
2) decrease 3 times
3) decrease 10 times
4) decrease 1000 times
Q. The incomplete burning of petrol and diesel produces -
1) nitric oxide
2) nitrogen dioxide
3) carbon dioxide
4) carbon monoxide
Q. Lime water is turned milky by -
1) CO
2) CO2
3) O2
4) O3
Q. The breath test conducted by police to check drunken driver has which one of the following on the filter paper?
1) Potassium dichromate-sulfuric acid
2) Potassium permanganate-sulfuric add
3) Silica gel coated with silver nitrate
4) Turmeric
Q. Consider the following statement :
Atomic number of an element is a more fundamental property than its atomic mass.Who among the following scientists has made the above statement?
1) Dmitri Mendeleev
2) Henry Moseley
3) J.J. Thomson
4) Ernest Rutherfod
Q. Employing Chromatography, one cannot separate -
1) radio-isotopes
2) colours from a dye
3) pigments from a natural colour
4) drugs from blood
Q. Soap solution used for cleaning purpose appears cloudy. This is due to the fact that soap micelles can
1) refract light
2) scatter light
3) diffract light
4) polarise light
Q. In graphite, each carbon atom is bonded to three other carbon atoms -
1) forming a three-dimensional structure
2) in the same plane giving a hexagonal array
3) in the same plane giving a square array
4) in the same plane giving a pentagonal array
Q. Which one of the following is monatomic?
1) Hydrogen
2) Sulphur
3) Phosphorus
4) Helium
Interior design is a fun and creative field. It mixes art and practicality to make spaces look good and work well. With more people wanting great places to live and work, the need for skilled interior designers is rising. Let’s look at what it takes to have a career in interior design, including nee →
Foundation Date: December 8, 1991 Headquarters: The Republic of Belarus Executive Secretaries: Sergei Lebedev Member Countries: 12 Commonwealth of Independent States (CIS) was established on December 8, 1991, and the leaders of the Republic of Belarus, the Russian Federation, and Ukraine signed an a →
In 2009, an unknown programmer by the name of Satoshi Nakamoto put forward a whitepaper that proposed a creation of new form of digital currency - cryptocurrency. Cryptocurrency functions the same way as regular currencies do in that its used as a means of exchange, unit of account and a store of va →
Headquarter: New Delhi Function and Objective of the Organization: The Food Safety and Standards Authority of India (FSSAI)has been established under Food Safety and Standards Act, 2006 which consolidates various acts & orders that have hitherto handled food-related issues in various Ministries →
If you contribute your content to our site. Please mail us your content to editor@onlinegk.net