GK: Class 12 General Q&A · Page 70
3,658 free answers on GK (General) for Class 12 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- GeneralClass 12All
What Happens When Non-Metal Reacts with Salt
When nonmetals react with salts, the outcome depends heavily on the specific nonmetal and salt involved, as these reactions are less straightforward than metal-salt displacement reactions. Nonmetals typically don't displace metals from salts the way more reactive metals displace less reactive ones because nonmetals gain electrons rather than donate them. However, reactive nonmetals like halogens (chlorine, bromine, iodine) can displace less reactive halogens from their salts in what are calle
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What Happens When You Put Salt on Metal
When salt (typically sodium chloride) is placed on metal, particularly in the presence of moisture, it accelerates corrosion through an electrochemical process. Salt dissolves in water moisture to form an electrolyte solution that facilitates electron flow between different areas of the metal surface. This creates tiny galvanic cells where some regions become anodic (losing electrons, getting corroded) while others become cathodic (gaining electrons, remaining protected). Iron and steel are e
- GeneralClass 12All
Who is Air 1 in Class 10
The All India Rank 1 (AIR 1) position in Class 10 varies by examination board and year, as different boards conduct separate examinations. CBSE, ICSE, and various state boards all have their own topper rankings. CBSE typically announces the highest scorers after Class 10 results but doesn't assign a single "AIR 1" designation in the same way competitive exams like JEE or NEET do, since multiple students sometimes achieve identical top scores. Instead, CBSE recognizes all students scoring the
- GeneralClass 12All
Is 100% Possible in CBSE
Yes, scoring 100% (500/500) in CBSE Class 10 is possible, though exceptionally rare, with a few students achieving this feat in some examination years. This requires flawless performance across all five subjects, including scoring full marks in both objective and subjective portions, which demands not just complete knowledge but perfect presentation, accuracy, and alignment with marking schemes. Mathematics and Science can be more achievable for full marks due to objective answer keys, but la
- GeneralClass 12All
Who is the Viral Girl in CBSE Topper
Questions about "viral" CBSE toppers typically refer to high-achieving students whose results, interviews, or personal stories gained widespread social media attention during particular examination years. These instances vary annually, and specific students become newsworthy for different reasons—exceptional scores, overcoming adversity, unique study methods, or simply media coverage that resonates widely. Social media and news platforms frequently highlight topper stories during result
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What is the Ratio of Aqua Regia in NCERT
Aqua regia is prepared by mixing concentrated hydrochloric acid (HCl) and concentrated nitric acid (HNO₃) in a ratio of 3:1 by volume, meaning three parts HCl to one part HNO₃. This specific ratio creates a powerful oxidizing mixture capable of dissolving noble metals like gold and platinum that resist attack by individual acids. The name "aqua regia" translates from Latin as "royal water," reflecting its ability to dissolve gold, the "king of metals." This mixture appears in NCERT Class 10 c
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What is A1 in CBSE
A1 is the highest grade in the CBSE 9-point grading system, awarded to students who score between 91-100% in a subject or overall. This grade represents outstanding academic performance, indicating comprehensive understanding of concepts, excellent application skills, and superior exam execution. When students receive A1 across all subjects, it reflects consistent excellence and positions them competitively for admission to desired streams and schools in Class 11. The A1 grade is prominently
- GeneralClass 12All
What is the Difference Between Metallic and Nonmetallic Elements Class 10
Metallic elements are characterized by their ability to lose electrons easily, forming positive ions (cations), while nonmetallic elements tend to gain electrons, forming negative ions (anions). Metals typically exhibit high electrical and thermal conductivity due to free-moving electrons in their structure, display metallic luster, are malleable (can be hammered into sheets) and ductile (can be drawn into wires), and generally have high melting and boiling points. Examples include iron, copp
- GeneralClass 12All
Can Be Easily Cut with a Knife Class 10
Sodium and potassium are metals that can be easily cut with a knife, appearing as soft, silvery substances that slice smoothly to reveal shiny surfaces that quickly tarnish when exposed to air. These alkali metals from Group 1 of the periodic table have such low density that they even float on water, and their softness results from weak metallic bonding between atoms. When freshly cut, they display metallic luster, but this surface rapidly oxidizes, forming a dull layer of oxide due to their
- GeneralClass 12All
Can I Score 98 in 1 Month
Scoring 98% in board exams with just one month of preparation is theoretically possible but highly challenging and depends on several critical factors: your current knowledge level, study efficiency, subject strengths, and ability to maintain intense focus. Students who already have strong foundational understanding from throughout the year and need only revision and practice have better chances than those starting from scratch. If you've attended classes regularly, completed most coursework,
- GeneralClass 12All
Is 22 Out of 70 Pass or Fail
A score of 22 out of 70 represents approximately 31.4%, which falls below the typical passing threshold of 33% used by CBSE and most Indian educational boards, making this a failing score under standard criteria. To pass with 33%, a student would need approximately 23.1 marks out of 70, meaning 22 falls just short. However, passing requirements can vary depending on the specific examination, institution, or subject—some internal assessments or practical exams might have different thresh
- GeneralClass 12All
Has Anyone Scored 500 in CBSE 10th
Yes, several students have scored 500 out of 500 (100%) in CBSE Class 10 board examinations over the years, though such perfect scores are exceptionally rare. These achievements represent the pinnacle of academic performance, requiring flawless execution across all five subjects including languages, mathematics, science, and social science. CBSE doesn't always publicly announce all students who achieve perfect scores, but educational media and schools occasionally report these extraordinary a
- GeneralClass 12All
Is 70% Good in CBSE Class 10
Scoring 70% in CBSE Class 10 is a respectable achievement that demonstrates adequate understanding of the curriculum and provides viable pathways for further education. This percentage comfortably exceeds the passing threshold and qualifies students for admission to Class 11 in most schools, though options for Science stream in highly competitive institutions might be limited since many set cutoffs around 75-85%. Students with 70% can confidently pursue Commerce or Humanities streams where ad
- GeneralClass 12All
Who Got 100% in CBSE
Multiple students have scored 100% (500/500 marks) in CBSE Class 10 board examinations over the years, though such perfect scores are exceptionally rare due to the difficulty of achieving full marks across all five subjects. CBSE doesn't always publicly disclose names of students achieving perfect scores, but educational media occasionally reports these extraordinary achievements when they occur. These students demonstrate not just comprehensive knowledge but exceptional exam technique, perfe
- GeneralClass 12All
Is 27 Out of 80 Pass or Fail
Whether 27 out of 80 is passing or failing depends on the passing criteria set by the specific examination board or institution. In CBSE and most Indian educational boards, the general passing requirement is 33%, which means scoring at least 33 out of 100 marks. For an 80-mark paper, 33% equals 26.4 marks, so scoring 27 out of 80 would just barely meet the minimum passing threshold if the standard 33% criterion applies. However, some institutions or specific subjects may have different passin
- GeneralClass 12All
Is 90% A1 or A2
In the CBSE grading system, 90% falls within the A1 grade category, which is the highest grade awarded. The CBSE 9-point grading scale assigns A1 grade to students scoring between 91-100%, but in practical reporting of percentages, a score of 90% is considered borderline and typically interpreted as A1-level performance. The grading system was designed to reduce pressure on students by focusing on broader achievement bands rather than precise marks, though CBSE now reports actual percentages
- GeneralClass 12All
Will 2025 Board Be Easy
Predicting whether the 2025 board examinations will be "easy" or "difficult" is speculative, as CBSE and other boards design papers to maintain consistent difficulty standards year to year while assessing genuine student understanding. Exam difficulty is subjective—what seems easy to a well-prepared student appears challenging to someone with gaps in understanding. Boards aim for papers that allow prepared students to score well while appropriately distinguishing achievement levels acro
- GeneralClass 12All
Who Got 99.8 in ICSE
Specific information about individual students who scored 99.8% in ICSE (Indian Certificate of Secondary Education) examinations varies by year, as multiple high achievers reach this exceptional level annually. ICSE toppers frequently achieve scores in the 99% range, with names and details published by CISCE (Council for the Indian School Certificate Examinations) after each board examination cycle. These exceptional students typically come from schools across India known for academic rigor,
- GeneralClass 12All
Is 90% Good in CBSE Class 10
Scoring 90% in CBSE Class 10 is an excellent achievement that places students well above average and opens doors to quality educational opportunities. This percentage typically qualifies students for admission to reputable schools for Class 11 in their desired stream, whether Science, Commerce, or Humanities. Most competitive schools set cutoffs between 85-90% for Science stream admission, so a 90% score comfortably meets these requirements. This percentage also reflects strong conceptual und
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What are 5 qualities of a good parent
Good parents demonstrate consistency in their caregiving, maintaining reliable routines, predictable responses, and steady emotional availability that helps children feel secure. This doesn't mean perfection—rather, it means children can generally predict how their parent will respond and trust that basic needs will be met even when life gets challenging. Consistent parents follow through on commitments, enforce boundaries fairly, and remain emotionally present across their children's u