Science Quiz Competition 7:

Question 1:- Human ears can listen only those sounds whose frequency lies between ________Hz to _________ Hz.

Question 2:- At what temperature density of water is maximum?

Question 3:- Out of methane and butane which gas produces more heat on burning?

Question 4:- Who discovered X rays?

Question 5:- Name the radioisotope which is used to cure cancer disease?

Answer 1: 20 Hz to 20000 Hz

Answer 2: 4⁰C

Answer 3: Methane

Answer 4: Wilhem Karl Roentgen

Answer 5: Co-60