AP EAMCET Carbon Group — practice questions
70 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP EAMCET Carbon Group in the app →How many electrons does a neutral atom of a group 14 element have in its outer shell?What is the ground-state outer electron configuration of an isolated group 14 atom?Which group 14 element alone forms a monatomic anion, the carbide ion?Which two group 14 elements are both capable of forming +2 ions?Which formula represents a hydride of silicon?At what temperature does silicon melt?What is the crumbling of tin objects into gray powder in the cold called?Which crystal structure do silicon and germanium have?Silicon makes up about what share of the Earth's crust, making it the second most abundant element?Which chemist isolated germanium and identified it as element 32?Which Russian chemist predicted the existence of germanium in 1869?Which chemist first obtained pure amorphous elemental silicon in 1824?The chemical symbol Pb comes from the Latin plumbum, the name of which element?Flerovium was named in honour of which scientist?About 80% of all lead produced goes into making which product?Which lead compound was formerly added to gasoline before being discontinued for toxicity?Which refining method is used for germanium after treating its ore with chlorine?What is the half-life of the radioactive isotope carbon-14?What is the most common naturally occurring isotope of silicon?What is the most common isotope of lead?Which two group 14 elements have magic nuclei, making them more stable and common?How much carbon is present in a typical 70-kilogram human?Diatoms and sea sponges use which silicon compound for their skeletons?Which organic tin compounds are highly toxic?Severe germanium poisoning can cause death by paralysis of which system?Which allotrope of carbon is the hardest known natural mineral?What hybridisation do carbon atoms have in diamond?In diamond, each carbon atom is covalently bonded to how many other carbon atoms?Why does graphite conduct electricity?Under standard conditions, which is the most stable allotrope of carbon?Compared with diamond, graphite has what density?A single layer of graphite is called what?Lonsdaleite, or hexagonal diamond, forms from graphite under which natural event?In which year were buckminsterfullerenes discovered?Fullerenes are named for their resemblance to structures designed by whom?How does a carbon nanotube differ in shape from a buckyball?About 80% of mined diamonds are unsuitable as gems. What are they called?Powdered graphite is mainly used as what?Roughly what pressure, with about 2000 C, can turn graphite into diamond?A silicone is a polymer built from repeating units of which group?Polydimethylsiloxane (PDMS) is derived by hydrolysis of which compound?How many electrons are present in the outer shell of each group 14 element?Group 14 elements are also called tetrels. The name comes from the Greek word tetra meaning what?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?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?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 geometry around each carbon atom in diamond?The name graphite comes from the Greek graphein, meaning what?Which carbon allotrope is used as a dry lubricant?Fullerenes were discovered in which year?Which carbon allotrope is cylindrical in shape?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?Silicon dioxide is a fundamental constituent of which material?What forms the backbone chain of a silicone polymer?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?A carbon monoxide ligand in a coordination complex is called what?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?