LGS Mixed Practice Test #793

Question 1

Which component of blood is primarily responsible for initiating the process of blood clotting to prevent excessive bleeding after an injury?

Accepted Answer

D. Platelets — Platelets (thrombocytes) are small, anucleated cell fragments in the blood that play a crucial role in hemostasis, the process of stopping bleeding. Upon injury, platelets aggregate at the site of damage and release factors that initiate the coagulation cascade, forming a blood clot. Red blood cells transport oxygen, white blood cells fight infection, and plasma is the liquid matrix of blood.

Answer

A. Red blood cells

Answer

B. White blood cells

Answer

C. Plasma

Question 2

India's G20 logo meaning:‌​‍

Accepted Answer

Lotus, Vasudhaiva Kutumbakam — Lotus + theme.‌​‍

Answer

Simple emblem

Answer

Peacock

Answer

Tiger

Question 3

The SI unit of magnetic field (flux density) is:‌​‍

Accepted Answer

Tesla — Tesla (T) = Wb/m²; 1 T = 10,000 gauss.‌​‍

Answer

Henry

Answer

Gauss

Answer

Weber

Question 4

A special phenomenon seen only in the Arabian Sea (off Kerala coast):‌​‍

Accepted Answer

Chakara — Chakara — a unique sea phenomenon off Kerala coast in monsoon, large fish gathering due to mud bank formation.‌​‍

Answer

Tides

Answer

Coral Reefs

Answer

Loo

Question 5

Equatorial climate vegetation:‌​‍

Accepted Answer

Evergreen rainforest — Multi-layered: emergent (50m+), canopy, understory, forest floor. ‌​‍50% of world's species in 7% of land.

Answer

Desert

Answer

Deciduous

Answer

Taiga

Question 6

Group 1 alkali metals show:‌​‍

Accepted Answer

Lowest IE in period; +1 oxidation state — Very reactive with water (Li→Cs increasing). ‌​‍Stored in kerosene. Form strong bases.

Answer

Highest electronegativity

Answer

Highest IE

Answer

No reactivity

Question 7

Which statement about the impact of the French Revolution is WRONG?

Accepted Answer

Little improvement in the condition of middle class — The French Revolution greatly expanded middle-class political and economic rights.

Answer

End of autocratic rule of Bourbon Kings

Answer

Decline in the supremacy of the Church

Answer

Declaration of Human Rights

Question 8

Glycolysis takes place in the:‌​‍

Accepted Answer

Cytoplasm — Glycolysis (glucose → 2 pyruvate) is cytoplasmic and does not need O₂.‌​‍

Answer

Endoplasmic reticulum

Answer

Nucleus

Answer

Mitochondrial matrix

Question 9

NEP 2020 emphasizes a shift in assessment practices from primarily summative and rote-learning based to one that is more:

Accepted Answer

B. Formative, competency-based, and designed to promote learning and development. — NEP 2020 calls for a transformation in assessment, moving towards formative, competency-based evaluation that assesses higher-order skills and promotes learning, rather than just rote memorization. Option A contradicts the policy's move away from high-stakes, frequent standardized tests. Option C suggests an exclusive reliance which is too extreme. Option D highlights a traditional use of assessment that NEP 2020 seeks to de-emphasize.

Answer

A. Focused on standardized national-level examinations at every grade.

Answer

C. Exclusively reliant on peer-assessment and self-assessment for all academic levels.

Answer

D. Primarily used for ranking students and schools at district and state levels.

Question 10

Stefan-Boltzmann law applies to:

Accepted Answer

Ideal blackbody — P/A = σT⁴. Real objects have emissivity ε < 1 → P = εσT⁴. Kirchhoff's law: absorptivity = emissivity.

Answer

Any object

Answer

Only gases

Answer

Only stars

LGS Mixed Practice Test #793