LGS Mixed Practice Test #668

Question 1

Quicklime (CaO) on adding water forms:

Accepted Answer

Slaked lime [Ca(OH)₂] — CaO + H₂O → Ca(OH)₂ (exothermic); used in whitewashing.

Answer

Gypsum

Answer

Limestone

Answer

Marble

Question 2

A 2-year-old toddler frequently says "no" and insists on doing things independently, even if they struggle. According to Erik Erikson's stages of psychosocial development, which stage is this child primarily navigating?

Accepted Answer

B. Autonomy vs. Shame and Doubt — The stage of Autonomy vs. Shame and Doubt (ages 1-3 years) is characterized by a child's desire for independence and control over their own actions and body, often expressed through saying "no" and striving for self-sufficiency. Trust vs. Mistrust occurs during infancy, Initiative vs. Guilt during the preschool years, and Industry vs. Inferiority during school age.

Answer

A. Trust vs. Mistrust

Answer

C. Initiative vs. Guilt

Answer

D. Industry vs. Inferiority

Question 3

Malaria caused by:

Accepted Answer

Plasmodium (protozoa) — Plasmodium parasite, transmitted by female Anopheles mosquito.

Answer

Virus

Answer

Bacteria

Answer

Fungus

Question 4

A primary school teacher is planning to introduce the concept of 'states of matter' (solid, liquid, gas) to her students. Which type of teaching aid would be most effective for initial engagement and concrete understanding?

Accepted Answer

C. Real-life objects like ice, water, and steam (carefully demonstrated). — For primary students, concrete experiences with real objects are crucial for understanding abstract concepts like states of matter. While other options have their uses, direct observation and manipulation of real examples provide the most foundational and memorable learning experience at this stage.

Answer

A. A detailed chart displaying the molecular structure of each state.

Answer

B. A video animation illustrating phase changes at a molecular level.

Answer

D. A worksheet with definitions and examples of each state.

Question 5

Hall-Héroult process extracts:

Accepted Answer

Aluminium (electrolysis of Al₂O₃ in molten cryolite) — Cryolite (Na₃AlF₆) lowers m.p. from 2000°C to ~950°C. Carbon anode, steel cathode.

Answer

Iron

Answer

Copper

Answer

Zinc

Question 6

Army Day 2023 outside Delhi:

Accepted Answer

Bangalore (first outside) — First Army Day outside Delhi was Bengaluru.

Answer

Delhi

Answer

Pune

Answer

Chennai

Question 7

Which of the following is a primary bile acid synthesized in the liver from cholesterol?

Accepted Answer

C. Cholic acid — Cholic acid is a primary bile acid synthesized directly from cholesterol in the liver, unlike deoxycholic acid and lithocholic acid, which are secondary bile acids formed by bacterial action in the intestine. Glycocholic acid is a conjugated form of cholic acid, not a primary bile acid itself.

Answer

A. Deoxycholic acid

Answer

B. Lithocholic acid

Answer

D. Glycocholic acid

Question 8

By next year, she ___ her degree.‌​‍

Accepted Answer

will have completed — Future Perfect: will have + V3. ‌​‍By next year (future deadline) = will have completed.

Answer

completes

Answer

completed

Answer

is completing

Question 9

Eravikulam National Park is famous for:

Accepted Answer

Nilgiri Tahr — Eravikulam NP, Idukki — largest population of endangered Nilgiri Tahr.

Answer

Elephants

Answer

Tigers

Answer

Lion-tailed Macaque

Question 10

In which district is Mangalavanam (smallest wildlife sanctuary in Kerala) situated?‌​‍

Accepted Answer

Ernakulam — Mangalavanam Bird Sanctuary is in central Kochi, Ernakulam district.‌​‍

Answer

Thrissur

Answer

Wayanad

Answer

Idukki

LGS Mixed Practice Test #668