LGS Mixed Practice Test #504

Question 1

Spontaneous reaction at constant T and P has:‌​‍

Accepted Answer

ΔG < 0 — ΔG = ΔH - TΔS. Negative means spontaneous. Equilibrium: ΔG=0.‌​‍

Answer

ΔG > 0

Answer

ΔH = 0

Answer

ΔS = 0

Question 2

Centripetal force required to keep a body in circular motion is:‌​‍

Accepted Answer

mv²/r — F_c = mv²/r = mω²r; directed toward centre.‌​‍

Answer

mg

Answer

ma

Answer

F·d

Question 3

Sri Lanka's Tamil conflict (1983-2009) ended with:

Accepted Answer

Military defeat of LTTE (May 2009) — 26-year civil war ended when Sri Lankan military defeated LTTE. Prabhakaran killed May 2009. ~100,000 total deaths. Accountability for human rights violations remains contested.

Answer

Ceasefire

Answer

Independence

Answer

Autonomy

Question 4

Which of the following best describes a key benefit for a teacher who regularly engages in action research within their classroom?

Accepted Answer

B. It enhances the teacher's professional development by fostering critical reflection and problem-solving skills. — Action research significantly contributes to a teacher's professional development by encouraging critical self-reflection, problem identification, and the development of context-specific solutions. It's a continuous process of improvement, not a one-time fix (A), nor is its primary purpose administrative evaluation (C) or standardization (D).

Answer

A. It provides a definitive solution to all classroom problems permanently.

Answer

C. It primarily serves as a method for administrators to evaluate teacher performance.

Answer

D. It standardizes teaching practices across all classrooms regardless of context.

Question 5

Nehru Memorial Museum at:

Accepted Answer

Teen Murti Bhavan — Teen Murti Bhavan, Delhi (former PM residence).

Answer

Red Fort

Answer

Parliament

Answer

Rajghat

Question 6

A manufacturing unit aims to produce a standardized herbal extract of Ashwagandha (Withania somnifera). What is the most appropriate approach for standardization to ensure consistent therapeutic efficacy?

Accepted Answer

C. Quantifying specific active marker compounds like Withanolides. — For ensuring consistent therapeutic efficacy of a herbal extract, standardization based on the quantification of specific active marker compounds (e.g., Withanolides in Ashwagandha) is crucial. While uniform color, ash content, and microbial absence are important for overall quality control, they do not directly guarantee the presence and concentration of the compounds responsible for the drug's therapeutic action.

Answer

A. Ensuring uniform color and odor of the extract batch.

Answer

B. Standardizing the extract based on the percentage of total ash content.

Answer

D. Verifying the absence of microbial contamination in the final product.

Question 7

A newly appointed Headmaster in a government high school in Kerala is seeking clarification regarding academic guidelines and administrative procedures for both SSLC and Higher Secondary sections under the unified education system. To which authority should the Headmaster primarily refer for comprehensive directives?

Accepted Answer

C. Directorate of General Education (DGE) — The Directorate of General Education (DGE) was formed by merging the Directorate of Public Instruction (DPI) and the Directorate of Higher Secondary Education (DHSE) to streamline the administration of general education from pre-primary to higher secondary levels. Therefore, the DGE is the primary authority for comprehensive directives covering both SSLC (formerly under DPI) and Higher Secondary (formerly under DHSE) sections. SCERT focuses on curriculum development and teacher training, not day-to-day administrative directives for schools.

Answer

A. Directorate of Public Instruction (DPI)

Answer

B. Directorate of Higher Secondary Education (DHSE)

Answer

D. State Council of Educational Research and Training (SCERT)

Question 8

Boyle's law:‌​‍

Accepted Answer

PV = constant at constant T and n — Charles: V/T. Gay-Lussac: P/T. Combined → ideal gas eqn.‌​‍

Answer

V/T = constant

Answer

PV = nRT

Answer

P/T = constant

Question 9

A teacher trainee has just completed a microteaching session focusing on the skill of 'Explaining'. According to the typical microteaching cycle, what should be the immediate next step for the trainee?

Accepted Answer

C. Receive constructive feedback from the supervisor and peers. — The microteaching cycle consists of Plan, Teach, Feedback, Re-plan, Re-teach, and Re-feedback. After completing the 'Teach' phase, the immediate next step is to receive constructive feedback from the supervisor and peers. While self-reflection and video analysis are valuable, they typically occur as part of or after the formal feedback session, guiding the re-planning phase.

Answer

A. Re-teach the same lesson to a new group of students.

Answer

B. Engage in self-reflection and prepare a detailed lesson plan for the next skill.

Answer

D. Analyze the video recording of the session to identify areas for improvement.

Question 10

A sub-centre is responsible for providing healthcare services to a population of up to how many individuals?

Accepted Answer

B. 5,000 — The correct answer is B. 5,000. A sub-centre is the most peripheral and first contact point between the primary healthcare system and the community, serving a population of up to 5,000. Options A, C, and D are incorrect as they do not align with the standard population coverage of a sub-centre.

Answer

A. 3,000

Answer

C. 10,000

Answer

D. 15,000

LGS Mixed Practice Test #504