Page 367 - General Knowledge

GENERAL KNOWLEDGE 2019

26. Consider the following statements:
1. Copernicium is at present highest-numbered element recognized by IUPAC
2. Copernicum has been synthesized in the lab by a nuclear reaction of Zinc and Lead Isotopes
Which among the above statements is / are correct?
A. Only 1 is correct
B. Only 2 is correct
C. Both 1 & 2 are correct
D. Neither 1 nor 2 are correct

27. The first metal to be used by man was:
A. Aluminum
B. copper
C. Iron
D. Silver

28. For respiration in deep sea, divers use mixture of:
A. Oxygen and helium
B. Oxygen and hydrogen
C. Oxygen and carbon dioxide
D. Oxygen, Helium & nitrogen

29. The minimum temperature at which a combustible substance catches fire is called:
A. fireless temperature
B. ignition temperature
C. static temperature
D. optimum temperature

30. Consider the following statements regarding Graphene and Fullerene:
1. Graphene is 2 dimensional , Fullerene is generally 3 dimensional
2. Graphene is SP2 allotrope of Carbon, while Fullerene is SP3 allotrope of Carbon
3. Graphene does not dissolve in petrol but fullerenes dissolve
Which among the above statements is / are correct?
A. Only 1 is correct
B. Only 2 is correct
C. Only 3 is correct
D. 1 & 3 are correct

31. Haber Process is used to produce which among the following? A. Potash
B. Ammonia
C. Urea
D. Nitrates

32. If a Hydrogen atom is removed from a hydrocarbon of Benzene group, the remaining
residue is called _________?
A. Alkyl
B. Aryl

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