JEE Main 2023 (Online) 10th April Morning Shift | JEE Main Year Wise Previous Years Questions

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MCQ (Single Correct Answer)

-1

The compound which does not exist is

(NH$$_4$$)$$_2$$BeF$$_4$$

PbEt$$_4$$

BeH$$_2$$

NaO$$_2$$

JEE Main 2023 (Online) 10th April Morning Shift

MCQ (Single Correct Answer)

-1

Out of Syllabus

The enthalpy change for the adsorption process and micelle formation respectively are

$$\mathrm{\Delta H_{ads} > 0~and~\Delta H_{mic} < 0}$$

$$\mathrm{\Delta H_{ads} > 0~and~\Delta H_{mic} > 0}$$

$$\mathrm{\Delta H_{ads} < 0~and~\Delta H_{mic} < 0}$$

$$\mathrm{\Delta H_{ads} < 0~and~\Delta H_{mic} > 0}$$

JEE Main 2023 (Online) 10th April Morning Shift

MCQ (Single Correct Answer)

-1

The number of molecules and moles in 2.8375 litres of O$$_2$$ at STP are respectively

1.505 $$\times$$ 10$$^{23}$$ and 0.250 mol

7.527 $$\times$$ 10$$^{22}$$ and 0.250 mol

7.527 $$\times$$ 10$$^{23}$$ and 0.125 mol

7.527 $$\times$$ 10$$^{22}$$ and 0.125 mol

JEE Main 2023 (Online) 10th April Morning Shift

MCQ (Single Correct Answer)

-1

The one that does not stabilize 2$$^\circ$$ and 3$$^\circ$$ structures of proteins is

$$-$$O $$-$$O $$-$$linkage

$$-$$S $$-$$S $$-$$linkage

van der Waals forces

H-bonding

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