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Practicing real exam questions helps you understand the exam pattern, improve accuracy, and boost your JEE score. Perfect for students aiming for top ranks in IIT-JEE.","tags","jee main joint entrance examination india","version","vip","location",{"_391":392,"_393":394},"type","Point","coordinates",[395,396],79.0888,21.1466,"in","priority",11,"createdOn",1756744302186,"updatedOn","questionsCount",24748,"courseCount",9,"examKey","questionData",{"_369":410,"_411":412,"_413":414,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"FGogDp3aoWgOWWl9vSLPuCDLaTZHPH","q","The pair that has similar atomic radii is :","ans",[95],"2019 - 12th April Evening Slot","course","chemistry","exp","Electron configuration of Mo(Molybdenum) = [Kr] 4d⁵ 5s¹. So it belongs to 4d series.\n

Electron configuration of W(Tungsten) = [Xe] 4f¹⁴ 5d⁴ 6s². So it belongs to 5d series.\n

Size of 3d < 4d = 5d. Due to lanthanoid contraction size of 4d and 5d series elements are almost same.\n
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JEE MAIN - Chemistry (2019 - 12th April Evening Slot - No. 12)

Explanation

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