AP EAPCET (Engineering) Carbon Group — practice questions
57 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP EAPCET (Engineering) Carbon Group in the app →How many electrons are present in the outer shell of each group 14 element?What is the ground state outer configuration of an isolated group 14 atom?Group 14 elements are also called tetrels. The name comes from the Greek word tetra meaning what?Which group 14 element alone forms the monatomic carbide anion C4-?Which two group 14 elements can both form +2 ions?Down group 14, the atomic radius generally does what?Which group 14 element is the densest, at 11.3 g per cubic cm?What is the melting point of silicon in degrees Celsius?Which form of tin is also called gray tin?Lead forms stable tetrahalides only with which halogens?After oxygen, which group 14 element is the second most abundant in Earth's crust?The name carbon comes from the Latin word carbo, meaning what?Who isolated germanium and identified it as element 32?In which year was amorphous silicon first obtained pure?Why was tetraethyllead dropped as a petrol additive?Tin is extracted by heating its mineral with coke. Which mineral is this?How can silicon be produced from silica?Which technique is used for the final refining of germanium?What is the half-life of the natural radioactive isotope carbon-14?What hybridisation do the carbon atoms of diamond show?Which is the hardest known natural mineral?What is the geometry around each carbon atom in diamond?Why does graphite conduct electricity?Under standard conditions, which allotrope of carbon is the most stable?The name graphite comes from the Greek graphein, meaning what?Which carbon allotrope is used as a dry lubricant?What is a single layer of graphite called?Fullerenes were discovered in which year?Fullerenes are named after the resemblance to structures devised by whom?Which carbon allotrope is cylindrical in shape?Lonsdaleite is formed from graphite in meteorites on impact and is also called what?Which form of carbon has no crystalline structure?Glassy carbon is widely used as which material in electrochemistry?In what form is silicon dioxide commonly found in nature?What is the shape of the CO2 molecule, unlike the structure of SiO2?How many oxygen atoms surround each silicon in most forms of SiO2?Which of these is an amorphous natural form of silica?Silicon dioxide is a fundamental constituent of which material?A silicone is a polymer built from repeating units of which group?Hydrolysis of which compound gives polydimethylsiloxane?Adding which compound to the hydrolysis mixture crosslinks silicone chains?What forms the backbone chain of a silicone polymer?Who coined the word silicone in 1901?Which solid is formed when silicone is burned in air?Most silicones are good electrical what?What type of bond joins carbon and oxygen in carbon monoxide?What is the oxidation state of carbon in carbon monoxide?How many valence electrons does CO have, making it isoelectronic with N2 and CN-?Water gas is a mixture of hydrogen and which other gas?Producer gas consists mostly of carbon monoxide and which gas?In the laboratory, CO is made by dehydrating formic acid with which reagent?A carbon monoxide ligand in a coordination complex is called what?Compared with air, carbon monoxide is what?Which organisms use silicon dioxide to build their skeletons?Which element in this group has no known biological role and is highly toxic?Carbon black is used as a filling in which product?Which carbon form makes the writing core of pencils?