Chemistry Questions and Answers

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Showing 10 of 71 questions
Q51
The metal does not give H2 on treatment with dilute HCL is
  • A Zn
  • B Fe
  • C Ag
  • D Ca
Answer: Option C
Q52
The number of g-molecule of oxygen in 6.02 x 1024CO molecules is
  • A 1 gram of molecule
  • B 0.5 gram of molecule
  • C 5 gram of molecule
  • D 10 gram of molecule
Answer: Option C
Q53
The most extensive, commercially useful source of thorium as monazite sand occurs in India at
  • A Orissa coast
  • B Travancore coast
  • C West Bengal coast
  • D Gujarat coast
Answer: Option B
Q54
The main active constituent of tea and coffee is
  • A nicotine
  • B chlorophyll
  • C caffeine
  • D aspirin
Answer: Option C
Q55
The maximum number of isomers for an alkene with molecular formula C4H8 is
  • A 5
  • B 4
  • C 2
  • D 3
Answer: Option B
Q56
The hardest form of carbon is
  • A coke
  • B graphite
  • C diamond
  • D charcoal
Answer: Option C
Q57
The most important ore of aluminium is
  • A bauxite
  • B magnetite
  • C haematite
  • D monazite
Answer: Option A
Q58
The number of electrons presents in H+ is
  • A zero
  • B one
  • C two
  • D three
Answer: Option A
Q59
The hottest part of the gas flame is known as
  • A luminous zone
  • B dark zone
  • C blue zone
  • D non-luminous zone
Answer: Option D
Q60
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
  • A carbon
  • B hydrogen
  • C oxygen
  • D nitrogen
Answer: Option C

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