Q. Which one of the following substances is not a mixture?
1) Tin
2) Sea water
3) Soil
4) Air
Q. Soaps clean surfaces on the principle based on -
1) Viscosity
2) Floatation
3) Elasticity
4) Surface tension
Q. Which one of the following does not represent the salt, Calcium carbonate?
1) Lime water
2) Limestone
3) Chalk
4) Marble
Q. A sample of soft soap contains -
1) Caesium
2) Potassium
3) Calcium
4) Magnesium
Q. Which one of the following statements about water is not true?
1) Hydrogen bonds are present in liquid water
2) Water has a high boiling point
3) Water has a high heat of fusion
4) Water is a non-polar molecule
Q. Which one of the following compounds does not exhibit a different oxidation number of the same element?
1) Pb3O4
2) Fe3O4
3) Fe2O3
4) Mn3O4
Q. The elements present in urea are -
1) C, H, O
2) C, N, O
3) C, H, N
4) C, H, N, O
Q. The numbers of sigma and pi bonds in benzene are -
1) 3, 3
2) 3, 6
3) 12, 3
4) 12, 6
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
Print media are lightweight, portable, disposable publications printed on paper and circulated as physical copies in forms we call books, newspapers, magazines, and newsletters. They hold informative and entertaining content that is of general or special interest. They are published either once or d →
Foundation Date: September 11, 1961 Headquarter: Gland (Switzerland) President & CEO: Carter Roberts Member Countries: All the countries of the world WWF was established in 1961 by a group of passionate and committed individuals who sought to secure the funding necessary to protect places and →
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.com