alleryMilk crates and plastic buckets are commonly moulded from:
- Polypropene
- Polyacetylene
- Natural rubber
- Nylon fibre
Show answer and solution
Correct answer: A. Polypropene
Polypropene is used for moulded articles such as milk crates and buckets.
NEET UG Hydrocarbons — practice questions — page 4
Explore 129 free Hydrocarbons questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 91–120 of 129.
Milk crates and plastic buckets are commonly moulded from:Read the answer and worked solution →Which hydrocarbon is burnt with oxygen in welding torches?Read the answer and worked solution →How many pi bonds are present in one ethyne molecule?Read the answer and worked solution →Industrially, ethyne is made by treating calcium carbide with:Read the answer and worked solution →Ethyne is more acidic than ethene because its carbon orbitals have:Read the answer and worked solution →Which compound does not react with sodamide to give a salt?Read the answer and worked solution →Ethyne reacts with sodium metal to give sodium acetylide and:Read the answer and worked solution →Propyne with dilute H2SO4 and HgSO4 gives mainly:Read the answer and worked solution →Which polymer made from ethyne can conduct electricity?Read the answer and worked solution →Aromatic compounds that lack a benzene ring are called:Read the answer and worked solution →How many position isomers does dibromobenzene have?Read the answer and worked solution →In a disubstituted benzene, the 1,2 relationship is called:Read the answer and worked solution →Benzene was first isolated in 1825 by:Read the answer and worked solution →Kekule's fixed structure predicted how many 1,2-dibromobenzenes?Read the answer and worked solution →A planar cyclic conjugated ring is aromatic if its pi electron count is:Read the answer and worked solution →Every C-C bond length in benzene is about:Read the answer and worked solution →X-ray diffraction shows that the benzene molecule is:Read the answer and worked solution →Commercially, benzene is obtained from:Read the answer and worked solution →Which aromatic hydrocarbon is used in moth repellent balls?Read the answer and worked solution →The characteristic reactions of arenes are:Read the answer and worked solution →The nitrating mixture for benzene is concentrated HNO3 with:Read the answer and worked solution →The electrophile in the nitration of benzene is the:Read the answer and worked solution →Friedel-Crafts alkylation of benzene uses an alkyl halide and:Read the answer and worked solution →Benzene with hydrogen over nickel at high temperature gives:Read the answer and worked solution →When burnt in air, benzene gives a:Read the answer and worked solution →The carbocation intermediate in electrophilic substitution of benzene is the:Read the answer and worked solution →The arenium ion is not aromatic because:Read the answer and worked solution →In chlorobenzene, the chlorine atom is:Read the answer and worked solution →Polynuclear hydrocarbons from burning tobacco are harmful because they are:Read the answer and worked solution →Bond angles around each carbon of an alkene double bond are about:Read the answer and worked solution →
Worked practice questions
Which hydrocarbon is burnt with oxygen in welding torches?
- Ethene
- Methane
- Benzene
- Ethyne
Show answer and solution
Correct answer: D. Ethyne
Acetylene mixed with oxygen gives the very hot oxyacetylene welding flame.
How many pi bonds are present in one ethyne molecule?
- 3
- 1
- 2
- 0
Show answer and solution
Correct answer: C. 2
Two pairs of parallel 2p orbitals overlap sideways to give two pi bonds.
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