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Kerala Psc ||Previous Science Questions||Part1||07.09.2018||(in Malayalam)
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Common alum is?

Siji Biju is teaching live on Unacademy Plus

Siji Biju
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Super sonic means objects traveling with a speed comparable to the speed of sound in air (344m/s).
thanks mam for your Effort💐
Good class. എന്നെ പോലെ സയൻസ് അറിയാത്ത ഒരുപാടുപേർക്ക് ഉപകാരപ്പെടും.. Thankyou very much...
  1. Important science Questions Railway/SSC/Kerala Psc

  2. 1.Which among the following is NOT present in animal cell? a) Mitochondria b) Chloroplast c) Nucleolus d) Plasma membrane 2. : The persistence of sound in an auditorium is due to: a) Single reflection of sound b) Repeated reflections of sound c) Repeated refraction of sound d) Vibration of objects placed in the auditorium adrwberstion h a big The sound will persist for a very long time due to this multiple reflections. The repeated reflection that results in this persistence of sound is hall, reverberation is required so that the entire hall can hear the sound

  3. 3. The common Alum is a) Potassium Alum b) Sodium Alum c) Ferro Alum d) Chrome Alum common Alum is 4.TEeagorationion of a sold irely into ts vaour is caled b) Condensation c) Vaporisation d) Sublimation

  4. 5.What does NASSCOM stand for ? a) National Associabon of Shares and -rules Companies b) NaTional Association of Software and Service Companies c) National Agency of Secret Se/Vice Companies d) None of the above 6.What type of the star is the SUN? a) Gaint b) Supergiant c) Dwarf d) None of the above

  5. 7.As compared to pure water, a body in salty water will a) Sink more b) Sink less c) Remain same d) Depends on the Way the body is reed Human body is slightly denser than pure water. Adding salt increases the density. So, a person will sink less and less as salt is added to it. It's so salty that a person cannot sink in it 8. Bromine is a al black solid b] red liquid c colourless gas [d] highly inflammable gas

  6. hich of the following metals forms an amalgam with other metals? [a] Tin [b] Mercury [c] Lead [d] Zinc 10. Which of the following is used in pencils? [a] Graphite bl Silicon cl Charcoal [d] Phosphorous

  7. 11.Which of the following is a non metal that remains liquid at room temperature? [a] Phosphorous [b] Bromine [c] Chlorine [d] Helium 12.Brass gets discoloured in air because of the presence of which of the following gases in air? [a] Oxygen [b] Hydrogen sulphide [c] Carbon dioxide [d] Nitrogen

  8. 13.Which of the gas is not known as green house gas? [a] Methane [b] Nitrous oxide [c] Carbon dioxide [d] Hydrogen 14.Quartz crystals normally used in quartz clocks etc. is chemically [al silicon dioxide [b] germanium oxide [c] a mixture of germanium oxide and silicon dioxide [d] sodium silicate

  9. 15Washing soda is the common name for [a] Sodium carbonate b] Calcium bicarbonate [c] Sodium bicarbonate [d] Calcium carbonate