General Science - Chemistry MCQs
41. When a piece of quicklime is dipped in water, it gives bubbles. This bubbling is due to which of the following ?
42. Which among the following acid is used to ascertain, whether pure Ghee has been adulterated with Vanaspati or Margarine?
43. Mizoroki-Heck reaction is catalyzed by which of the following metals?
44. Which among the following is used in preparing windows for X-Ray Tubes ?
45. Which among the following first increases than decreases in a Period of a periodic table?
46. Which among the following were not discovered by the time , Mendeleev published his periodic table?
47. Ekaboron was an element predicted by Mendeleev and he leaved a space for it in his Periodic Table. Later Ekaboron was identified with _____?
48. Which among the following allotropes of Oxygen is found in 6 phases under various pressures and temperatures?
49. Buckeyballs are basically the allotropes of _________?
50. What is the number of synthetic elements in periodic Table?