Which of the following statement is NOT true?

(A) Cathode rays travel in straight line
(B) Cathode rays are negatively charged
(C) Cathode rays travel from Anode to Cathode
(D) Cathode rays can ionize gases

Answer: (C) Cathode rays travel from Anode to Cathode

5 moles of NH3 contain:

(A) 1 mole of N atoms
(B) 5 moles of N atoms
(C) 3 moles of H atoms
(D) 5 moles of H atoms

Answer: (B) 5 moles of N atoms