51. Einstein’s famous equation which states that mass and energy are interchangeable is
(A) E = mc2
(B) E = cm2
(C) M = ec2
(D) M = ce2
The answer is: (A) E = mc2 ☑
52. The SI unit of electric current is
(A) Coulomb
(B) Ampere
(C) Volt
(D) Watt
The answer is: (B) Ampere ☑
53. The principal constituent of the atmosphere of the Earth is
(A) Oxygen
(B) Carbon
(C) Hydrogen
(D) Nitrogen
The answer is: (D) Nitrogen ☑
54. What is Dry Ice?
(A) Solid Oxygen
(B) Solid Carbon Dioxide
(C) Solid Hydrogen
(D) Solid Nitrogen
The answer is: (B) Solid Carbon Dioxide ☑
55. Which are the three primary colours?
(A) White, Black, Blue
(B) Red, Yellow, Blue
(C) Red, Orange, Blue
(D) Red, Green, Blue
The answer is: (D) Red, Green, Blue ☑