There is some concern regarding the nanoparticles of some chemical elements that are used by the industry in the manufacture of various products. Why? They can accumulate in the environment, and contaminate water and soil. 1.They can enter the food chains. 2.They can trigger the production of free radicals. Select the correct answer using the code given below:
1 and 2 only
3 only
1 and 3 only
1, 2 and 3
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy