National Science Olympiad Forum By SOF Olympiad Trainer - Page 224
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Jay from PSBB Millennium school, Chennai
Subject :NSO    Class : Class 7

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Kriti Bhonsale from Delhi Public School, Bengaluru
Subject :NSO    Class : Class 4

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Barnam from DPS GUWAHATI, KAMRUP
Class : Class 8
Ans is A

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Aarav from DPS, Bengaluru
Subject :NSO    Class : Class 3

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Arnav jagtap from AHS, Pune
Subject :NSO    Class : Class 10

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anushkasharma from cambridge court world school, jaipur
Class : Class 10
Why would (iii) be correct? Atomic size on going from left to right decreases so how would K be the smallest?

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shursti mathapati from podar International school, latur
Subject :NSO    Class : Class 7

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Jenisha Ghosh from Sri Chaitanya techno school, Bangalore
Subject :NSO    Class : Class 4

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Tejas Kapoor from Vissanji Academy, Mumbai
Subject :NSO    Class : Class 7

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Himanshi yadav from St. Francis convent school,sikandra Agra, AGRA
Subject :NSO    Class : Class 6

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Debanti from DAV Model School, Kharagpur
Class : Class 6
B, because Slate and Marble are metamorphic rocks whereas limestone is a sedimentary, making it the odd member

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Soumita Pramanik from HALLYAN high School, Howrah
Class : Class 6
D

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The Address from Somaiya, Mumbai
Subject :NSO    Class : Class 8

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The Address from Somaiya, Mumbai
Subject :NSO    Class : Class 8

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