Engineering Sciences
2020 · Paper 1
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Complete GATE XE 2020 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 55–57 of 175. Imported answers require review unless explicitly marked reviewed.
Question 12
Open questionXE-CMCQ2 marksNeeds review
Consider a FCC structured metal with lattice parameter a = 3.5 Å. If the material is irradiated using X-rays of wavelength λ = 1.5405 Å, the Bragg angle (2θ) corresponding to the fourth reflection will be:
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Open questionXE-CMCQ2 marksNeeds review
The number of Schottky defects per mole of KCl at 300 °C under equilibrium condition will be:
Given:
Activation energy for the formation of Schottky defect = 250 kJ.mol⁻¹
Avogadro number = 6.023 × 10²³ mol⁻¹
Universal Gas Constant = 8.314 J.K⁻¹.mol⁻¹
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 14
Open questionXE-CNAT2 marksNeeds review
In an industry, the probability of an accident occurring in a given month is 1/100. Let P(n) denote the probability that there will be no accident over a period of ‘n’ months. Assume that the events of individual months are independent of each other. The smallest integer value of ‘n’ such that P(n) ≤ 1/2 is ______ (round off to the nearest integer).
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