Practice questions without fighting the page.

<b>Correct option: C</b> — <b>Diamond</b>. <ul> <li><b>Reason:</b> Diamond has a <b>three‑dimensional covalent network</b> with each carbon atom sp3‑hybridized in a tetrahedral lattice, giving extremely strong bonds and high hardness.</li> <li><b>Key concept:</b> Hardness arises from strong <b>covalent bonds in a rigid crystal lattice</b>.</li> <li><b>Formula/numerical logic:</b> No formula required; hardness relates to bond strength and crystal structure.</li> <li><b>Exam tip:</b> Remember Mohs scale ranking: Diamond > Quartz > Graphite in terms of hardness; graphite is soft due to layered structure.</li> <li><b>Why others are incorrect:</b> Coke, charcoal are carbonized forms with weaker structures; graphite has layers that slip easily, making it soft. </li> </ul>

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<div class="ai-chip">? Phrasal Verb Learning</div>
<div class="ai-answer-card"><b>✅ Correct Answer</b><p>time and again — means repeatedly; many times.</p></div>
<div class="ai-why-card"><b>? Why?</b><p>The sentence shows you read the letter many times, i.e., time and again.</p></div>
<div class="ai-rule-card"><b>? Remember</b><p>Use it to describe actions done many times in the past or present.</p></div>
<div class="ai-example-card"><b>? Example</b><p>She checked the email time and again but found no reply.</p></div>
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Bhopal is the capital of of Madhya Pradesh. It is known as the City of Lakes, due to presence of various natural and artificial lakes.

<p><b>Answer: D) Tamil Nadu</b></p> <ul> <li>The hill station Coonoor is located in the Nilgiris district, Tamil Nadu, part of the Nilgiri Hills.</li> <li>Other options are incorrect: Karnataka, Andhra Pradesh, and Kerala do not host Coonoor.</li> <li>Important exam fact: Coonoor is near Ooty and is known for tea gardens and cool climate in the Western Ghats.</li> </ul>

<div class="ai-exp-block"> <b>Explanation:</b> <p>The Vernacular Press Act was enacted in 1878 to control the Indian-language press. It required permission from the government for publishing any vernacular newspaper or periodical that criticized the government or spread seditious ideas. This aimed to curb freedom of expression in regional languages. Among the options, 1878 is correct; other years do not correspond to this Act’s enactment.</p> </div> <div class="ai-did-block"> <b>? Did You Know?</b><br> <p>Note: The Act targeted vernacular presses to suppress anti-British sentiment in local languages.</p> </div> <div class="ai-remember-block"> <b>? Remember:</b> <p>Vernacular Press Act was enacted in 1878 to curb regional-language press criticisms of the government.</p> </div>