Explanation

Assessment software is specifically designed to track and evaluate learner progress through quizzes, tests, and analytics.

It provides real-time feedback and performance data.

Explanation

Given reaction:

NO(g) + CO₂(g) ⇌ NO₂(g) + CO(g)

Initial moles:

NO = 4 mol

CO₂ = 0.9 mol

NO₂ = 0

CO = 0

At equilibrium:

CO₂ = 0.1 mol

→ So, change in CO₂ = 0.9 - 0.1 = 0.8 mol consumed

→ Therefore, 0.8 mol of NO also reacted

→ 0.8 mol each of NO₂ and CO formed

Equilibrium moles:

NO = 4 - 0.8 = 3.2 mol

CO₂ = 0.1 mol

NO₂ = 0.8 mol

CO = 0.8 mol

Equilibrium expression:

K = [NO2][CO]/[NO][CO2] = (0.8)(0.8)/(3.2)(0.1) = 0.64/0.32 = 0.2

Explanation

Aldol condensation requires at least one α-hydrogen (hydrogen on the carbon next to the carbonyl group).

Benzaldehyde and formaldehyde lack α-hydrogens, so they cannot undergo Aldol condensation.

Explanation

She directed us to keep quiet over there.

Imperative sentences in indirect speech use verbs like told, ordered, directed + to-infinitive.

"Here" changes to "there" in indirect speech.

Explanation

The d subshell has 5 orbitals, each can hold 2 electrons, so total 10 electrons.

This is standard in electron configuration rules in chemistry.

Explanation

The formula to calculate max electrons in an orbit is 2n², where n = orbit number.

1st orbit (n = 1): 2 × 1² = 2 electrons

2nd orbit (n = 2): 2 × 2² = 8 electrons

For the 3rd orbit (n = 3): 2 × 3² = 18 electrons

Explanation

At temperatures above the optimum, enzymes lose their three-dimensional shape — a process called denaturation.

Denatured enzymes cannot bind substrates properly, leading to a rapid drop in reaction rate.

Explanation

Diatoms are microscopic algae and a major component of phytoplankton in aquatic ecosystems.

They play a key role in oxygen production and the marine food chain.

Explanation

A hypothesis is a testable, tentative explanation for a biological problem, based on initial observations.

It guides experiments and is later validated or refuted.

Explanation

Intelligence tests assess higher-order thinking skills, including problem-solving, analysis, and adaptability.

They go beyond rote knowledge (unlike achievement tests) to measure cognitive abilities.