No lessons are topics (E) + All topics are headings (A) = Some lessons are not headings (O), so further we can derive anything from it, hence conclusion I doesn’t follows and IV also doesn’t follows. Some headings are introductions.(I) + All introductions are conclusions.= Some headings are conclusions (A) ⟹ conversion ⟹ Some conclusions are headings. Hence conclusion II will follow but conclusion III doesn’t follows. Alternate Method:
Identify the element that is NOT a metalloid.
Repetition of sound produced by reflection of sound waves is called-
What term is used for atoms that have the same number of protons but different numbers of neutrons?
The rate of evaporation increases with ______.
Which mineral is also known as 'plumbago'?
What is the chemical formula of Urea, the best nitrogenous fertilizer?
The slow corrosion of iron in the presence of moist air is known as:
Dry powder fire extinguishers contain
Which gas is primarily monitored to assess organic pollution in sewage and surface water?
Which of the following metals is the lightest in the periodic table of elements?