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JEE Main 2022 (Online) 24th June Morning Shift
Numerical
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Atoms of element X form hcp lattice and those of element Y occupy $${2 \over 3}$$ of its tetrahedral voids. The percentage of element X in the lattice is ____________. (Nearest integer)

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JEE Main 2021 (Online) 31st August Evening Shift
Numerical
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The empirical formula for a compound with a cubic close packed arrangement of anions and with cations occupying all the octahedral sites in AxB. The value of x is _____________. (Integer answer)
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JEE Main 2021 (Online) 22th July Evening Shift
Numerical
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A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing X-ray diffraction studies. The density of a copper complex is found to be 7.62 g cm$$-$$3. The molar mass of copper complex is ____________ g mol$$-$$1. (Nearest integer)

[Given : NA = 6.022 $$\times$$ 1023 mol$$-$$1]
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JEE Main 2021 (Online) 20th July Evening Shift
Numerical
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Diamond has a three dimensional structure of C atoms formed by covalent bonds. The structure of diamond has face centred cubic lattice where 50% of the tetrahedral voids are also occupied by carbon atoms. The number of carbon atoms present per unit cell of diamond is ____________.
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