The most harmful effect of ionising radiations precisely involves:

Related Mcqs:

1. The effect of today’s radioactive fallout will probably be more harmful to children of future generations than to children now living because:

   A. Contamination of milk supply is not cumulative
   B. Infants are more susceptible to radiation
   C. Susceptibility to radiation increases with age
   D. Mutated genes are frequently recessive

2. Plant succession taking place in sandy area is precisely called:

   A. Halosphere
   B. Psammosphere
   C. Xerosphere
   D. Hydrosphere

3. Most harmful heavy metals causing water pollution:

   A. Pb, Hg, Cr, Cd
   B. P,Mn,B,Mg
   C. N,K,Mo
   D. Zn,Mo,Mg,Ag

4. The atmospheric UV radiations are absorbed in the zone called:

   A. Troposphere
   B. Stratosphere
   C. Mesosphere
   D. Thermosphere

5. The most harmful pesticide is:

   A. PAN
   B. 2,4,5-T
   C. 2,4-D
   D. DDT

6. A very harmful fibrous component causing pollution an inflicting diseases of lungs in human beings:

   A. Grease
   B. Asbestos
   C. Eichhornia roots
   D. ABS micelle

7. The most harmful component of detergents causing water pollution is:

   A. Linear alkyl sulphonate
   B. Sulphates and phosphate
   C. Alkyl benzenes sulphonate
   D. None of these

8. The ultraviolet radiations from the sun cause reaction that produce:

   A. Carbon monoxide
   B. Sulphur dioxide
   C. Ozone
   D. Flourides

9. CO is harmful to human being because:

   A. It decreases CO2 concentration
   B. It competes O2 to combine with haemoglobin
   C. It is carcinogenic
   D. It depletes O3 layer

10. The solar radiations are the sole source of:

    A. Energy
    B. Materials
    C. Both (a) & (b)
    D. Standing state