The packing efficiency of two-dimensional square unit cell shown below is
39.27%
68.02%
74.05%
78.54%
Additional Questions
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Which of the following has longest C–O bond length? (free in C–O bond length in CO is 1.128 A.) |
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The number of radial nodes in 3s and 2p respectively are |
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Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because |
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For a sample of perfect gas when its pressure is changed isothermally from p; to pi, the entropy change is given by |
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The number of geometrical isomers of the complex $[Co(NO_2)_3(NH_3)_3]$ is |
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In the following radioactive decay, $_{92}X^{232} \rightarrow _{89}Y^{220}$, how many $\\alpha$ and $\\beta$-particles are ejected from X to Y? |
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A 0.0020 m aqueous solution of an ionic compound $Co[(NH_3)_5(NO_2)]Cl$ freeze at - 0.00732°C. Number of moles of ions which 1 mole of ionic compound produces on being dissolved in water will be (Ky = - 1.86°C/m) |
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Predict the correct intermediate and product in the following reaction: |
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A compound contains atoms of three elements A, B and C, If the oxidation number of A is +2, B is +5 and that of C is -2, the possible formula of the compound is |
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The d-electron configuration of $Cr^{2+}, Mn^{2+} Fe^{2+} and Co^{2+} are d^4, d^5,d^6 and d^7$ drespectively. Which one of the following will exhibit minimum paramagnetic behaviour? (At. no. Cr = 24, Mn = 25, Fe = 26, CO = 27) |
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