Chemistry Questions Answers

• 29. Atomic number is equal to

  1. Number of electrons
  2. Number of nutron
  3. Number of protons
  4. Total number of protons and neutrons

  Answer :

  Option C

• 30. What is hottest part of the gas flame is called ?

  1. blue zone
  2. luminous zone
  3. dark zone
  4. non-luminous zone

  Answer :

  Option D

• 31. The Chemical Symbol of Sodium is

  1. Binding cost and Royalty cost
  2. Paper cost and Printing cost
  3. Paper cost and Royalty
  4. Royalty and Promotion cost
  5. So
  6. Sd
  7. Na
  8. Nu

  Answer :

  Option

• 32. Atomic number of an element gives

  1. 1999
  2. 2000
  3. 2001
  4. 1998
  5. the number of nucleons in its atom
  6. the number of electrons in its atom
  7. the weight of the atom of the element
  8. the total number of elementary particles in its atom

  Answer :

  Option F

• 33. The most electronegative element among the following is
  

  1. 1990
  2. 1991
  3. 1992
  4. 1993
  5. sodium
  6. bromine
  7. fluorine
  8. oxygen

  Answer :

  Option

• 34. Which one of the following gas is readily soluble in water at room temperature ?

  1. chlorine
  2. nitrogen
  3. ammonia
  4. carbon dioxide

  Answer :

  Option D

• 35. Which of the following gases is the most toxic?

  1. Carbon dioxide
  2. Sulphur dioxide
  3. Carbon monoxide
  4. Acetic acid

  Answer :

  Option C