AP EAPCET (Engineering) Boron Group — practice questions
46 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP EAPCET (Engineering) Boron Group in the app →Which collective name for group 13 comes from the Latin prefix meaning three?Which element of group 13 is a semi-metal while the others are metals?After boron, which group 13 element has the highest melting point (660 degrees C)?What is the formula of diborane, the simplest borane?What is the nature of boron oxide, B2O3?Which oxidation state is the most stable for thallium?The increasing stability of the +1 state down group 13 is due to theWhich scientist first prepared an impure form of aluminium in 1825?Gallium takes its name from the Latin name of which country?Which chemist discovered gallium in 1875 using its spectral lines?Indium got its name from which feature of the element?In which year was thallium discovered by Crookes and Lamy?Which country accounts for about 70 percent of world boron extraction?Which of these is a mineral of boron?Aluminium makes up roughly what percentage of the Earth's crust?In the structure of diborane, how many hydrogen atoms bridge the two boron atoms?Compared with terminal B-H bonds, the bridging B-H bonds in diborane areWhat do diborane and water give on reaction?Burning diborane in oxygen forms water and which boron compound?Diborane adds across alkenes to form trialkylboranes in which reaction?Diborane forms adducts with Lewis bases, so it behaves as aWhich gallium hydride is similar to diborane?A solution of borax in water isWhich acid is formed when borax reacts with hydrochloric acid?Borax with ammonium chloride is used when welding iron and steel as aBorax is stable enough to serve in acid-base titration as aWhere was borax first discovered, in dry lake beds?Borosilicate glass, made with boron, is valued for its resistance toWhy is aluminium well suited for canning food?Aluminium is a powerful reducing agent in the thermite reaction because of itsWhy can concentrated nitric acid be stored in aluminium containers?Aluminium reacts with aqueous sodium hydroxide to formPrecipitated aluminium hydroxide is useful in water treatment forAluminium hydroxide dissolves in both acid and alkali. This behaviour is calledSapphire and ruby are impure forms of which mineral?Which process converts bauxite into alumina using hot sodium hydroxide?Alumina is electrolysed in a molten mixture based on which compound?What material are the anodes in the Hall-Heroult cell made of?Aluminium smelters are sited where electricity is plentiful and cheap because production isWhich group 13 element is a stable monoisotopic one, with only 27Al?Which group 13 element is synthetic and has no stable isotopes?Gallium arsenide is an important compound used inThallium is best known for beingA lack of boron in soil leads to what in plants?Boron was first extracted in 1808 by which method used by Humphry Davy?Aluminium sulfide on contact with water yields aluminium hydroxide and