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Chemistry

General Knowledge on Chemistry

(Click on suggested Options to select the answer | Color Red means : Wrong & Green Means: Correct)
91. Which one of the following materials is suitable for water purification?
92. Silver ware turns black after a period of time due to formation of
  • A. nitrate coating on silver
  • B. sulphide coating on silver
  • C. chloride coating on silver
  • D. oxide coating on silver
  • Check Answer | Discussion
93. Which Uranium isotope is used in nuclear power plants to produce electricity?
94. Which one of the following chemicals is commonly used by farmers to destroy weeds?
95. Which one of the following carbohydrates is used for silvering of mirror?
96. Which one of the following chemicals released along with domestic wastes has caused the phenomenon of productivity of water bodies?
  • A. Phosphate and nitrates
  • B. Sulphates and chlorides
  • C. Chlorides and carbonates
  • D. Bicarbonates and carbonates
  • Check Answer | Discussion
97. Which of the following pairs of chemical compounds has the potential for carbon capturing by chemical process to reduce the global warming?
  • A. Potassium oxide and sodium oxide
  • B. Magnesium oxide and calcium oxide
  • C. Magnesium oxide and potassium
  • D. Calcium oxide and potassium oxide
  • Check Answer | Discussion
98. Which one of the following is the reason for keeping the chloroform in brown-tinted glass contains?
  • A. Its brilliance colour hurts eyes
  • B. Its deep red colour is piercing
  • C. With UV-rays and O2, it forms poisonous gas phosgene
  • D. With IR-rays, it forms a poisonous cyanide
  • Check Answer | Discussion
99. The elements of a group in the periodic table
100. The most abundant metal in the Earth's crust is

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