Explanation

Salt provides ions that allow electric current to flow between electrodes.

It helps complete the circuit inside the battery for proper operation.

Explanation

Explanation

Cars in a single lane slow down and crowd together, similar to molecules in a compressed fluid.

They adjust spacing and speed like fluid molecules under compression.

Explanation

P₂O₅ is a white hygroscopic powder.

It sublimes at 360°C without melting.

Its hygroscopic nature allows it to absorb water and form phosphoric acid.

Explanation

For the rate equation Rate = k[A]²[B], the exponents of the concentration terms indicate the order of the reaction with respect to each reactant. 

For reactant A, the exponent is 2. Therefore, the reaction is second-order with respect to A.

For reactant B, the exponent is 1 (as [B] is understood to be [B]¹).

Therefore, the reaction is first-order with respect to B. 

Explanation

Central metal = Pt (oxidation state IV)

Ligands: 3 NH₃ (ammine), Cl (chloro), Br (bromo), NO₂ (nitro)

Anionic complex → suffix “platinate”

Counter ion = Cl⁻ → “chloride”

IUPAC name combines all → Triamminechlorobromonitroplatinate(IV) chloride.

Explanation

SnCl₂ has 3 electron pairs around Sn (2 bonding + 1 lone pair).

According to VSEPR theory, lone pair repels more, giving a bent/angular shape.

Bond angle is less than 120°.

Explanation

Electron affinity (EA) measures the tendency to gain an electron.

Nitrogen has a half-filled 2p³ configuration, which is stable, so it reluctant to gain an electron → lowest EA.

Explanation

AgCl is slightly soluble → [Ag⁺] = [Cl⁻] = s

s² = Ksp → s = √(2 × 10⁻¹⁰) ≈ 1.41 × 10⁻⁵ mol/dm³

Explanation

15 g urea → 0.25 mol

180 g water → 10 mol

Relative lowering of vapor pressure = 0.25 ÷ 10.25 ≈ 0.024