Practice questions without fighting the page.

as per 2011 census language spoken<br>
1. Tamil (5.69 %)<br>
2. Gujarati (4.55 %)<br>
3. Punjabi (2.57 %) <br>
4. Kashmiri (0.541 %)

<ul> <li><b>Correct option: B</b> — Noise</li> <li><b>Reason:</b> A green muffler is a noise-reduction device attached to vehicles or machinery to lower sound levels, thus tackling noise pollution.</li> <li><b>Key concept:</b> Acoustic damping and energy dissipation reduce sound intensity emitted by engines or machinery.</li> <li><b>Formula/logic (brief):</b> Sound reduction involves decreased sound intensity, often measured in decibels (dB); a muffler reduces dB levels.</li> <li><b>Exam tip:</b> If the option mentions pollution types, choose the one related to sound for devices labeled “muffler.”</li> <li><b>Why others are incorrect:</b> It does not primarily prevent air, soil, or water pollution.</li> </ul>

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<div class="ai-chip">? Grammar Learning</div>
<div class="ai-answer-card"><b>✅ Correct Answer</b><p>The correct answer is 'are'.</p></div>
<div class="ai-why-card"><b>? Why?</b><p>The verb matches the nearer subject 'friends' (plural), so we use 'are'.</p></div>
<div class="ai-rule-card"><b>? Remember</b><p>When not only... but also connects two subjects, the verb agrees with the nearer subject.</p></div>
<div class="ai-example-card"><b>? Example</b><p>Not only Pinki but also her friends are buying books.</p></div>
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<b>Answer: It was <i>a</i> unit of measurement.</b> <ul> <li><b>Rule:</b> Use <i>a</i> before a singular count noun beginning with a consonant sound to mean “one,” non-specific (indefinite article).</li> <li><b>Why “a” is correct:</b> “unit” starts with a consonant sound /juː/ (yoo-nit), so we use <i>a</i>.</li> <li>

<b>Correct answer: D</b> <ul> <li><b>Explanation</b>: A sphygmomanometer measures <b>blood pressure</b> using a cuff and gauge to read systolic/diastolic pressures (in mmHg). Concept: arterial pressure in the circulatory system. </li> <li><b>Why the others are incorrect</b>: <ul> <li>A) Heart beat is assessed by auscultation/palpation, not this device.</li> <li>B) Vision is checked with a refractometer/eye exam tools.</li> <li>C) Blood sugar is measured with a glucometer.</li> </ul> </li> <li><b>Exam tip</b>: Remember “cuff + gauge = blood pressure.”</li> </ul>

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<div class="ai-chip">? Vocabulary Learning</div>
<div class="ai-answer-card"><b>✅ Correct Answer</b><p>The opposite of erudite is ignorant.</p></div>
<div class="ai-why-card"><b>? Why?</b><p>Erudite means very knowledgeable, while ignorant means not knowing much, so they are opposites.</p></div>
<div class="ai-rule-card"><b>? Remember</b><p>Think: erudite = learned; use ignorant to show not learned.</p></div>
<div class="ai-example-card"><b>? Example</b><p>He was erudite in history, but his cousin was ignorant about the topic.</p></div>
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<b>Answer: C</b> (Note: The correct option given is B in your prompt, but the widely accepted incorrect association is B—“South-equatorial warm currents of Indian Ocean” are not a direct driver of the Indian Monsoon climate.) <ul> <li><b>Why B is not associated:</b> The South Equatorial Current influences regional ocean conditions but is not a primary driver of the Indian monsoon rainfall mechanism.</li> <li><b>Why A, C, D are associated:</b> El Niño (A) modulates monsoon rainfall variability; Western Disturbances (C) bring winter precipitation to N. India; Cyclones of Bay of Bengal (D) interact with the monsoon trough and affect rainfall.</li> <li>

The river originates in the western slopes of the Aravalli Range near Ajmer, Rajasthan where it is known as the Sagarmati. It flows south west ward through the hills and across the plains of the Marwar region in Rajasthan. The river is 495 km long.