KCET · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Helium is used in balloons in place of hydrogen because it is
- A incombustible
- B lighter than hydrogen
- C radioactive
- D more abundant than hyrogen
Answer & Solution
Correct Answer
(A) incombustible
Step-by-step Solution
Detailed explanation
Helium (He) is a non-flammable (incombustible) gas and its lifting power is \(93 \%\) as compared to flammable hydrogen gas, due to these reasons it is used in filling balloons and other lighter air-crafts.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- Reaction of methyl bromide with aqueous sodium hydroxide involvesKCET 2010 Easy
- Which of the following is generally water insoluble?KCET 2019 Easy
- In oxygen and carbon molecule the bonding isKCET 2022 Medium
- Excess of \(\mathrm{PCl}_{5}\) reacts with concentrated \(\mathrm{H}_{2} \mathrm{SO}_{4}\) givingKCET 2013 Easy
- Which of the following is not true about the amorphous solids?KCET 2022 Easy
- In Buna-S, the symbol Bu stands forKCET 2013 Easy
More PYQs from KCET
- Sucrose is dextrorotatory but after hydrolysis the mixture show laevorotation, this is because ofKCET 2023 Medium
- The horizontal component of Earth's magnetic field at a place is \(3 \times 10^{-5} \mathrm{~T}\). If the dip at that place is \(45^{\circ}\), the resultant magnetic field at that place isKCET 2023 Easy
- Presence of halogen in organic compounds can be detected usingKCET 2007 Easy
- Of the total incident solar radiation, the percentage of photosynthetically active radiation (PAR) captured by the plants isKCET 2019 Hard
- \(1 \mathrm{~g}\) of silver gets distributed between \(10 \mathrm{~cm}^{3}\) of molten zinc and \(100 \mathrm{~cm}^{3}\) of molten lead at \(800^{\circ} \mathrm{C}\). The percentage of silver still left in the lead layer is approximatelyKCET 2011 Easy
- \(K_{a}\) values for acids \(\mathrm{H}_{2} \mathrm{SO}_{3}, \mathrm{HNO}_{2}, \mathrm{CH}_{3} \mathrm{COOH}\) and \(\mathrm{HCN}\) are respectively \(1.3 \times 10^{-2}\), \(4 \times 10^{-4}, 1.8 \times 10^{-5}\) and \(4 \times 10^{-10}\), which of the above acids produces stronger conjugate base in aqueous solution?KCET 2021 Easy