Q. Which allotropy of carbon is in rigid three-dimensional structures?
1) Graphite
2) Fullerence
3) Diamond
4) Carbon blck
Q. What is the role of positive catalyst in a chemical reaction?
1) It increase the rate of reaction
2) It decrease the rate of reaction
3) It increase the yield of the products
4) It provides better purity of the products
Q. Why hard water does not give lather with soap?
1) Hard water contains Ca and Mg ions which form precipitate with soap
2) Hard water contains sulphate and chloride ions which form precipiate
3) pH of hard water is high
4) pH of hard water is less
Q. Which of the following gases in the atmosphere is/are responsible for acid rains?
1. Oxides of sulphur
2. Oxides of nitrogen
3. Oxide of carbon
1) 1 and 2 only
2) 1 and 3 only
3) 2 only
4) 1,2 and 3 only
Q. The gas used in a refrigerator is-
1) Cooled down on flowing
2) Cooled down when compressed
3) Heated up on flowing
4) Cooled down when expanded
Q. Which one of the following processes of weathering belongs to both mechanical and chemical weathering?
1) Hydration
2) Exfoliation
3) Crystallisation
4) Carbonation
Q. The reaction that takes place in soap making is called saponification. Basically soap is sodium or potassium salts of
1) long chain monocarboxylic acids
2) long chain dicarboxylic acids
3) long chain tricarboxylic acids
4) glycerol
Q. The metal constituent of chlorophyll is
1) Potassium
2) Iron
3) Magnesium
4) Manganese
Q. During explosion of gunpowder, which of the following gases are evolved in the proportion of 1:3?
1) Nitrogen : Oxygen
2) Oxygen : Nirtogen
3) Nitrogen : Carbon dioxide
4) Carbon dioxide : Nitrogen
Q. The major component used in preparation of different types of glasses is
1) Sodium borate
2) Silica
3) Sodium silicate
4) Calcium silicate
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