JEE Main 2021 (Online) 27th August Evening Shift | Periodic Table & Periodicity Question 28 | Chemistry

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JEE Main 2021 (Online) 27th August Evening Shift

MCQ (Single Correct Answer)

-1

Choose the correct statement from the following :

The standard enthalpy of formation for alkali metal bromides becomes less negative on descending the group.

The low solubility of CsI in water is due to its high lattice enthalpy.

Among the alkali metal halides, LiF is least soluble in water.

LiF has least negative standard enthalpy of formation among alkali metal fluorides.

JEE Main 2021 (Online) 27th August Evening Shift

MCQ (Single Correct Answer)

-1

The correct order of ionic radii for the ions, P^3$$-$$, S^2$$-$$, Ca²⁺, K⁺, Cl^$$-$$ is :

P^3$$-$$ > S^2$$-$$ > Cl^$$-$$ > K⁺ > Ca²⁺

Cl^$$-$$ > S^2$$-$$ > P^3$$-$$ > Ca²⁺ > K⁺

P^3$$-$$ > S^2$$-$$ > Cl^$$-$$ > Ca²⁺ > K⁺

K⁺ > Ca²⁺ > P^3$$-$$ > S^2$$-$$ > Cl^$$-$$

JEE Main 2021 (Online) 27th August Evening Shift

MCQ (Single Correct Answer)

-1

Which one of the following is used to remove most of plutonium from spent nuclear fuel?

ClF₃

O₂F₂

I₂O₅

BrO₃

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

-1

In which one of the following molecules strongest back donation of an electron pair from halide to boron is expected?

BCl₃

BF₃

BBr₃

BI₃

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