Q31. Which one of the following elements is essential for construction is nuclear reactors?
[A] Nickel
[B] Cobalt
[C] Tungsten
[D] Zirconium
Q32. Which one is not metal?
[A] nitrogen
[B] sulfur
[C] sugar
[D] all of these
Q33. The absolute value of charge on electron was determined by
[A] Rutherford
[B] Chadwick
[C] R.A. Millikan
[D] J.J.Thomson
Q34. Which of the following acids is NOT present in grapes?
[A] Citric acid
[B] Acetic acid
[C] Malic acid
[D] Tartaric acid
750+ Chemistry Quiz Questions and Answers
Q35. What is the element present in urea
[A] C, N, H
[B] C, N, O
[C] C, O, N, H
[D] C, H, O
Q36. _________ on mixing with water changes to gypsum.
[A] Calcium Sulphate Hemihydrate
[B] Calcium Phosphate Hemihydrate
[C] Calcium Phosphate
[D] Sodium Hydrogen Carbonate
Q37. Constantan is an alloy of copper and _________.
[A] nickel
[B] iron
[C] aluminum
[D] tin
Q38. Which combination of atoms can form a polar covalent bond?
[A] Na and Br
[B] H and H
[C] N and N
[D] H and Br
Q39. Which is the gas used for making vegetables and vanaspathi from vegetable oils?
[A] Argon
[B] Hydrogen
[C] Helium
[D] Nitrogen
Q40. __________ is a semiconductor.
[A] Ga
[B] Ge
[C] Pb
[D] Sn