Everyday Science MCQs 12

Who of the following scientists proved that the stars with mass less than 1.44 times the mass of the Sun end up as White Dwarfs when they die?
(a) Edwin Hubble
(b) S. Chandrashekhar-✔️
(c) Stephen Hawking
(d) Steven Weinberg

Who gave the first evidence of the Big-Bang theory?
(a) Edwin Hubble-✔️ 
(b) Albert Einstein
(c) S. Chandrasekhar
(d) Stephen Hawking

Which onr the following is the most effective carrier for communications?
(a) Cables
(b) Microwaves-✔️
(c) Optical fibres
(d) Radiowaves

Which one of the following types of waves are used in a night vision apparatus?
(a) Radio waves
(b) Microwaves
(c) Infra-red waves-✔️
(d) None of the above

Which one of the following statement is NOT correct?
(a) Milk contains none of the B-vitamins-✔️
(b) Vitamin-A (retinal) deficiency leads to dry and scaly skin
(c) One of the symptoms of scurvy is pain in the joints
(d) Vitamin-B, (thiamine) deficiency can lead to heart failure

Which one of the following planets has largest number of natural satellites or moons?
(a) Jupiter-✔️
(b) Mars
(c) Saturn
(d) Venus

Which one of the following is used as an explosive?
(a) Phosphorus dichloride
(b) Mercuric oxide
(c) Graphite
(d) Nitroglycerine-✔️

Which one of the following is responsible for blue baby syndrome?
(a) Fluoride
(b) Nitrate-✔️
(c) Arsenic
(d) Lead

Which one of the following is not a radioactive element?
(a) Uranium
(b) Radium
(c) Thorium
(d) Cadmium-✔️

Which one of the following is correct? A concrete wall generally,
(a) only reflects sound
(b) only absorbs sound
(c) only transmits sound
(d) absorbs and transmits sound-✔️