Practice questions without fighting the page.

<b>Correct option: A</b> <ul> <li><b>Why it’s correct:</b> Domestic cooking gas (natural gas) is a hydrocarbon mix mainly of light alkanes, chiefly methane (CH4) and some ethane (C2H6).</li> <li><b>Key concept:</b> Composition of natural gas vs LPG; light hydrocarbons dominate the fuel gas.</li> <li><b>Brief formula:</b> CH4 (methane) and C2H6 (ethane).</li> <li><b>Exam tip:</b> If the question asks specifically about LPG, remember LPG is propane (C3H8) and butane (C4H10), not methane/ethane.</li> <li><b>Why others are incorrect:</b> B lists LPG components (butane/isobutane) not the main; C includes unsuitable gases (ethylene/CO); D gas pair is not used as cooking fuel.</li> </ul>

Head: Yukiya Amano

w.e.f 21st January, 1972

Choir an organized group of singers, especially one that takes part in church services or performs in public.

The adjective true takes the preposition to when it means faithful, loyal, keeping promises.

Structure: true to + noun/pronoun

Meaning: to be loyal or faithful towards someone or something.