LGS Mixed Practice Test #722

Question 1

Sree Padmanabha temple vault B:‌​‍

Accepted Answer

Unopened (disputed) — Vault B — legal disputes.‌​‍

Answer

Empty

Answer

Opened

Answer

Destroyed

Question 2

Adsorption on activated charcoal is:‌​‍

Accepted Answer

Physisorption (van der Waals), reversible, low heat — ΔH ~20-40 kJ/mol. ‌​‍Multilayer. Chemisorption: chemical bond, high ΔH (>80), monolayer, specific.

Answer

Electrolysis

Answer

Neither

Answer

Chemisorption

Question 3

What is the study of mind and behaviour called?‌​‍

Accepted Answer

Psychology — Psychology.

Answer

Sociology

Answer

Biology

Answer

Physiology

Question 4

IndiGo market share:‌​‍

Accepted Answer

Largest airline 60%+ India — Market leader.‌​‍

Answer

Merged

Answer

Small

Answer

Closed

Question 5

Nylon 6,6 is a synthetic polymer renowned for its high tensile strength, elasticity, and abrasion resistance, making it suitable for various industrial applications. Considering its chemical structure and synthesis, which of the following statements accurately describes the formation and a key application of Nylon 6,6?

Accepted Answer

B. It is formed by the condensation polymerization of hexamethylenediamine and adipic acid, and is primarily used in manufacturing ropes and fabrics. — Nylon 6,6 is a polyamide synthesized through condensation polymerization, involving the reaction between hexamethylenediamine and adipic acid, where water molecules are eliminated. Its robust mechanical properties, including high tensile strength and abrasion resistance, make it ideal for industrial applications such as ropes, textiles, and engineering plastics. Option A describes Nylon 6 and misidentifies its application; Option C describes polyethylene/polypropylene and misidentifies the application; Option D describes Polyethylene Terephthalate (PET).

Answer

A. It is formed by the addition polymerization of caprolactam and is primarily used in manufacturing electrical insulators.

Answer

C. It is formed by the addition polymerization of ethene and propene monomers, and is primarily used in non-stick coatings.

Answer

D. It is formed by the condensation polymerization of terephthalic acid and ethylene glycol, and is primarily used in making high-strength plastic bottles.

Question 6

International Human Rights Day is observed on:‌​‍

Accepted Answer

10 December — 10 December — anniversary of UDHR (1948).‌​‍

Answer

24 October

Answer

26 January

Answer

1 May

Question 7

The primary function of the epiglottis during swallowing is to:

Accepted Answer

B. Prevent food from entering the trachea. — The epiglottis is a flap of cartilage located at the root of the tongue that closes over the opening of the larynx (trachea) during swallowing, preventing food and liquids from entering the respiratory tract. It does not primarily direct food into the esophagus (that's the pharynx's role), initiate the gag reflex, or facilitate air passage during swallowing.

Answer

A. Direct food into the esophagus.

Answer

C. Initiate the gag reflex.

Answer

D. Facilitate air passage into the larynx.

Question 8

Oxidation is the process of:‌​‍

Accepted Answer

Loss of electrons — OIL RIG: Oxidation Is Loss, Reduction Is Gain (of electrons).‌​‍

Answer

Gain of electrons

Answer

Loss of protons

Answer

Gain of neutrons

Question 9

A teacher is planning lessons for a Grade 3 student. According to the NEP 2020, which stage of the new pedagogical and curricular structure does this student belong to?

Accepted Answer

B. Preparatory Stage — The NEP 2020 introduces a 5+3+3+4 curricular structure. Grade 3 falls into the 'Preparatory Stage' (Grades 3-5), which focuses on play, discovery, and activity-based learning, transitioning to more formal classroom learning. The Foundational Stage covers 3-8 years (Anganwadi/Preschool to Grade 2).

Answer

A. Foundational Stage

Answer

C. Middle Stage

Answer

D. Secondary Stage

Question 10

Latent heat of vaporisation of water is approximately:‌​‍

Accepted Answer

2260 kJ/kg — Latent heat of vaporisation of water ≈ 2260 kJ/kg (540 cal/g).‌​‍

Answer

334 kJ/kg

Answer

80 cal/g

Answer

4.186 J/g·K

LGS Mixed Practice Test #722