TRBExam.co.in

Which is a hallmark property of many room‑temperature ionic liquids (RTILs)?

Universal miscibility with water in all cases.

Strong oxidizing power intrinsic to all RTILs.

Extremely high volatility enabling easy distillation.

Negligible vapor pressure and high thermal stability, useful as green media.

Molten salts (e.g., NaCl–AlCl3) as solvents are characterized by:

Exclusive solubility for covalent molecules only.

Always reducing environments due to solvated electrons.

High ionic conductivity and ability to dissolve ionic species via complex ion formation.

Low temperature volatility and molecular hydrogen bonding networks.

Using Slater’s rules, estimate Z_eff for a 3d electron in Fe (Z=26).

≈1.80

≈6.25

≈3.75

≈9.50

For a 4s electron in Fe (Z=26), Z_eff using Slater’s rules is closest to:

≈6.25

≈8.50

≈1.20

≈3.75

Which element has the highest second ionization energy (IE2)?

Which set shows decreasing ionic radius?

Na+ > Mg2+ > Al3+

Na+ = Mg2+ = Al3+ (isoelectronic)

Al3+ > Mg2+ > Na+

Mg2+ > Na+ > Al3+

Which combination shows the strongest lattice energy (hard–hard pairing)?

BaBr2

AgI

CdI2

MgO

Which statement is correct about diagonal relationships?

Li shows similarities to Mg (e.g., formation of organometallics and thermal stability of carbonates).

Na is similar to Sr diagonally.

K is diagonally related to Ca with near‑identical hydration energies.

Be is diagonally related to Si with identical chemistry.

Which pair best illustrates the inert‑pair effect in +1 oxidation state stabilization?

Tl(I) vs Al(I)

In vs Tl(III) being more stable than +1

Sn(II) vs Sn(IV) without trends

Ga(I) vs Tl(III)

Which statement about PF5 is correct?

It is trigonal planar with three equivalent P–F bonds.

It is square pyramidal due to a stereochemically active lone pair.

It is octahedral with equivalent bonds.

It is trigonal bipyramidal; axial P–F bonds are longer than equatorial ones.

Chemistry — Unit 1 — Test 7

Result

Test Analysis

Your History

Leaderboard

Attempt Analysis

Explanations