Chemistry Questions and Answers

Practice Mode
Showing 10 of 71 questions
Q31
The mass of one Avogadro number of helium atom is
  • A 1.00 gram
  • B 4.00 gram
  • C 8.00 gram
  • D 4 x 6.02 x 1023 gram
Answer: Option B
Q32
The items amenable to detection by soft x-rays are
  • A contrabands
  • B lead in bullets
  • C narcotics
  • D genuine coins from counterfeit coins
Answer: Option D
Q33
The material which can be deformed permanently by heat and pressure is called a
  • A thermoplastic
  • B thermoset
  • C chemical compound
  • D polymer
Answer: Option A
Q34
The mass number of a nucleus is
  • A always less than its atomic number
  • B the sum of the number of protons and neutrons present in the nucleus
  • C always more than the atomic weight
  • D a fraction
Answer: Option B
Q35
The inexpensive and commonly used variety of glass is called soda glass. It is called so because
  • A was used initially for making bottles of soda(carbonated drink)
  • B is made using soda(sodium carbonate)
  • C was initially used for storing sodium carbonate
  • D is made using soda lime
Answer: Option B
Q36
The gas used in the manufacture of vanaspati from vegetable oil is
  • A hydrogen
  • B oxygen
  • C nitrogen
  • D carbon dioxide
Answer: Option A
Q37
The graphite rods in the nuclear reactor
  • A react with U to release energy
  • B produce neutrons
  • C undergo combustion which triggers the nuclear fission
  • D convert fast moving neutrons into thermal neutrons
Answer: Option D
Q38
The first metal used by man was
  • A iron
  • B copper
  • C gold
  • D bronze
Answer: Option B
Q39
The most electropositive elements among the following is
  • A Na
  • B Ca
  • C K
  • D Cs
Answer: Option D
Q40
The method that cannot be used for removing permanent hardness of water is
  • A adding sodium carbonate
  • B distillation
  • C adding caustic soda
  • D boiling
Answer: Option D

📚 More from General Knowledge

← All Topics 🎯 Practice ⏱️ Take Test 🔍 Search
General Knowledge
Back to General Knowledge
Other Subjects
Questions and Answers for Competitive Exams Various Entrance Test