Chemistry
2023 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE CY 2023 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 61–63 of 65. Imported answers require review unless explicitly marked reviewed.
Question 61
Open questionCYNAT2 marksNeeds review
The intrinsic viscosity of a sample of polystyrene in toluene is 84 cm³ g⁻¹ at 30 °C. It follows Mark-Houwink equation with empirical constant values of K = 1.05 × 10⁻² cm³ g⁻¹ and a = 0.75. The molecular weight of the polymer is ______ × 10³ g mol⁻¹ (rounded off to the nearest integer)
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 62
Open questionCYNAT2 marksNeeds review
According to Debye-Hückel limiting law, the mean molal activity coefficient for 0.87 g K₂SO₄ (molar mass = 174 g mol⁻¹) in 1 kg of water at 25 °C is ______ (rounded off to two decimal places)
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 63
Open questionCYNAT2 marksNeeds review
A solution is prepared by dissolving 128 g of naphthalene (C₁₀H₈) in 780 g of benzene (C₆H₆). The vapor pressure of pure benzene is 12.6 kPa at 25 °C. Assuming that naphthalene in benzene is an ideal solution, the partial vapor pressure of benzene is ______ kPa (rounded off to two decimal places)
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer