Question 692 Which of the following is not a type of element ? A) Metals B) Non- metals C) Gases D) Metalloids No Details
Question 693 Which of the following is also known as Laughing gas ? A) Nitric oxide B) Nitrous oxide C) Nitrogen penta oxide D) Nitrogen No Details
Question 694 The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is ? A) 22 B) 2 C) 38 D) 20 No Details
Question 695 Who is regarded as father of modern chemistry? A) Rutherford B) Einstein C) Lavoisier D) 3⃣ V. Raman No Details
Question 696 Which of the following gases is lighter than air? A) Oxygen B) Ammonia C) Carbon Dioxide D) Nitrogen No Details
Question 699 The most electronegative element among the following is ? A) sodium B) bromine C) fluorine D) oxygen No Details
Question 700 The number of moles of solute present in 1 kg of a solvent is called its ? A) molality B) molarity C) normality D) formality No Details