MHT CET · Chemistry · Polymers
Which among the following statements is NOT true about high density polythene?
- A It is obtained from ethene.
- B It needs high pressure \((1000-2000 \mathrm{~atm})\) for synthesis.
- C Polymerization occurs in presence of Zieglar-Natta catalyst.
- D Melting point is higher than LDP.
Answer & Solution
Correct Answer
(B) It needs high pressure \((1000-2000 \mathrm{~atm})\) for synthesis.
Step-by-step Solution
Detailed explanation
HDP is obtained by polymerization of ethene in presence of Zieglar-Natta catalyst at a temperature of \(333 \mathrm{~K}\) to \(343 \mathrm{~K}\) and a pressure of 6-7 atm. Its melting point (in the range of 144\(150^{\circ} \mathrm{C}\) ) is higher than that of LDP (melting point \(110^{\circ} \mathrm{C}\) ).
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
- Identify glycosidic linkage present in maltose.MHT CET 2023 Medium
- The solubility product of \(\mathrm{PbCl}_2\) at \(298 \mathrm{~K}\) is \(3.2 \times 10^{-5}\). What is its solubility in mol dm\({ }^{-3}\) ?MHT CET 2023 Medium
- Which of the following is existing oxoacid of fluorine?MHT CET 2025 Easy
- In a solution, \(0.02 \mathrm{M}\) acetic acid is \(4 \%\) dissociated. The \(\left[\mathrm{OH}^{-}\right]\) in the solution isMHT CET 2009 Hard
- Gypsum isMHT CET 2012 Medium
- Identify the correct decreasing order of densities of d -block elements.MHT CET 2020 Easy
More PYQs from MHT CET
- The upper end of the spring is fixed and a mass ' \(\mathrm{m}\) ' is attached to its lower end. When mass is slightly pulled down and released, it oscillates with time period 3 second. If mass ' \(\mathrm{m}\) ' is increased by \(1 \mathrm{~kg}\), the time period becomes 5 second. The value of ' \(\mathrm{m}\) ' is (mass of spring is negligible)MHT CET 2023 Hard
- The distance of a point \((2,5)\) from the line \(3 x+y+4=0\) measured along the line \(\mathrm{L}_1\) and \(\mathrm{L}_2\) are same. If slope of line \(L_1\) is \(\frac{3}{4}\), then slope of the line \(\mathrm{L}_2\) isMHT CET 2023 Medium
- Iso-propyl amine is aMHT CET 2009 Easy
- Pure samples of copper carbonate synthesised in laboratory and found naturally if both contains \(51 \cdot 35 \%\) copper, \(38 \cdot 91 \%\) carbon and \(9 \cdot 74 \%\) oxygen by weight. This is an accordance withMHT CET 2020 Medium
- The mass of the lift is 200 kg , when it ascends with an acceleration of \(4 \mathrm{~m} / \mathrm{s}^2\) then the tension in the cable supporting the lift will be [Given: Acceleration due to gravity \(\left.g=10 \mathrm{~m} / \mathrm{s}^2\right]\)MHT CET 2024 Easy
- The vectors \(\bar{a}\) and \(\bar{b}\) are not perpendicular and \(\overline{\mathrm{c}}\) and \(\overline{\mathrm{d}}\) are two vectors satisfying \(\overline{\mathrm{b}} \times \overline{\mathrm{c}}=\overline{\mathrm{b}} \times \overline{\mathrm{d}}\) and \(\overline{\mathrm{a}} \cdot \overline{\mathrm{d}}=0\), then the vector \(\overline{\mathrm{d}}\) is equal toMHT CET 2024 Easy