Bihar Board Class 12 (Science) s-Block Elements — practice questions
57 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Bihar Board Class 12 (Science) s-Block Elements in the app →Lithium, sodium and potassium belong to which numbered group?Which alkali metal is the most abundant in nature?What is the valence electron configuration of the alkali metals?In which liquid are alkali metals usually stored in the laboratory?What crystal structure do all the alkali metals share?Which stable alkali metal has a pale golden tint?Which instrument, invented in 1859, led to the discovery of rubidium and caesium?Who first isolated potassium in 1807 by electrolysing molten caustic potash?Who discovered francium in 1939?With which element does lithium show a diagonal relationship?Which alkali metal forms a stable nitride with nitrogen?Which alkali metal halide is poorly soluble in water?Which alkali metal hydroxide is not deliquescent?How does atomic radius change on moving down the alkali metal group?Why is an alkali metal cation much smaller than its parent atom?Going from lithium to caesium, what happens to chemical reactivity?Which trend holds for melting points of alkali metals from Li to Cs?Which alkali metal is an exception to the density trend, being lighter than the one above it?Why do alkali metals almost always form only +1 ions?What do alkali metals produce when they react with cold water?How does lithium behave when dropped into water?Why do alkali metals give distinctive flame colours?Which alkali metal is used as an anode in batteries and in psychiatric medication?The efficient yellow street lamp uses vapour of which element?Which pair of alkali metals are essential elements acting as body electrolytes?Why are lithium compounds partly covalent?Which lithium salts serve in dehumidifiers?Why is francium extremely rare in nature?What property lets all alkali metals be cut easily with a knife?Which of these elements is an alkaline earth metal?What ionic charge do alkaline earth metals readily form?How does reactivity of group 2 metals compare with group 1 metals?Which alkaline earth halides are covalent rather than ionic?Which alkaline earth metal does not react with water or steam except at very high temperature?How does magnesium react with water compared with calcium?What do Ca, Sr and Ba form with water?Radium is found in nature only as a product of the decay of which elements?Which mineral is a common source of magnesium?In which mineral is much of the barium found?Why do radium and strontium isotopes collect in bone?Which radioactive isotope is a common fission product of uranium in nuclear reactors?Which element is the only even-atomic-number element that is monoisotopic?How many electrons do all alkaline earth metals have in their valence shell?What is the formula of washing soda?Which name denotes anhydrous sodium carbonate formed by heating its hydrates?In the Solvay process, brine, ammonia and CO2 first yield which sodium compound?Which products form when sodium bicarbonate is heated in the Solvay process?Which compound is the only waste product of the Solvay process?Which Belgian industrial chemist developed the ammonia-soda process in 1861?The Leblanc process for soda ash was patented by which French chemist?Which two wastes make the Leblanc process costlier than Solvay's?What role does sodium carbonate play in making glass?Which ions cause water hardness?Sodium carbonate is unusual among metal carbonates because it is what?What happens to sodium carbonate decahydrate in dry air?What is the nature of an aqueous solution of sodium carbonate?Which mineral name refers to sodium carbonate decahydrate?