Revision TestClass VIIISubject: ScienceChapter 2, 6 and 11M.M !Ti"e: 1#r.$1. #o% "an& 'ones are there in a (la"e) *+plain each one in short %ith proper dia,ra". 6$2. -hat is nitro,en (i+ation) .ra% dia,ra" o( nitro,en c&cle. /$0. .e(ine (orce. *+plain its each t&pe. 6$/. -hat are the basic re1uire"ents (or co"bustion) /$. -hat chan,es are brou,ht b& (orce) 2$6. #o% are proto'oa help(ul and har"(ul to us) 6$2. -hat are the di((erent t&pes o( use(ul bacteria) 0$3. #o% %ere sa(et& "atch stic4s invented) /$5. -hat is pressure) #o% is it di((erent (ro" Thrust) 0$1!. -hat do "ean b& "icro or,anis"s) 2$11. -hat is at"ospheric pressure) -hat are various properties o( pressure) 6$12. The pressure o( a ,as contained in a c&linder %ith a "ovable piston is 0!! 6a. The area o( the piston is !. "2. Calculate the (orce that is e+erted on the piston.2$10. Calculate the pressure produced b& a (orce o( 3!! 7 actin, on an area o( 2.! "2.28888888889:: T#* ;*ST888888888Revision TestClass VIIISubject: ScienceChapter 0 and /M.M !Ti"e: 1#r.$1. -hat are "etals) State so"e basic properties o( "etals. 6$2. -hat are the di((erences bet%een natural and s&nthetic (ibres) /$0. -hat do "ean b&, "etals) -hat do the& (or" on reactin, %ith o+&,en) ?ive proper reactions. /$6. #o% "an& t&pes o( pol&"ers are there) ?ive their t&pes) /$2. -h& is phosphorous stored in %ater) 2$3. I( a burnin, "atch stic4 is brou,ht near the "outh o( a test tube, in %hich "etal and acid are reacted, there is a