Related Questions

Radon 222 এবং Radon-220 উভয়ই Radon এর আইসোটোপ। যদি Radon-222 এর নিউক্লিয়াসে 136 টি নিউট্রন থাকে তাহলে Radon-220 এর নিউক্লিয়াসে কতগুলো প্রোটন থাকবে? ( Radon-222 and Radon-220 are the isotopes of Radon. If Radon-222 has 136 neutrons then what will be the number of protons in the nucleus of Radon-220?)
A 84
B 86
C 134
D 136
একখন্ড রেডনের 70% ক্ষয় হতে কত সময় লাগবে? রেডনের অর্ধায়ু 3.85 দিন। (How much time is required to decay 70% of a piece of radon? Half life of radon is 3.85 days.)
A 5.06 days
B 4.69 days
C 4.5 days
D 7.66 days
E 6.69 days
Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?
A Thorium
B Radium
C Plutonium
D Radan
240 radioactive grams of goo loses half its radioactivity every 10 days. How many grams of radioactive goo is left in 40 days?
A 120
B 60
C 15
D none
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months
Carbon monoxide is a pollutant, which causes
A Respiratory disease (e.g. asthma)
B Asphyxiation (suffocation) leading to death
C Retardation in crop growth
D Damage to building materials like marble
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes
A Paralysis of muscles & loss of appetite
B Nervous depression
C Gastritis & diarrhea
D All of the above
Pollutant from motor car exhaust that causes mental disease is
A Lead
B NO2
C SO2
D Hg
Indira Gandhi Indoor Stadium is located in which city ?
A Chennai
B Kolkata
C New Delhi
D Mumbai
The dance in Himachal Pradesh, performed indoor, solo or duet, especially when life comes to a standstill during cold winter is
A Rouf
B Munzra
C Giddha parhaun
D Luddi dance

Next steps