VFA Mixed Practice Test #251

Question 1

Complex [Ni(CN)₄]²⁻ geometry:‌​‍

Accepted Answer

Square planar (dsp² hybridisation, low-spin) — Ni²⁺ is d⁸. ‌​‍Strong field CN⁻ pairs up electrons → square planar. Tetrahedral in [NiCl₄]²⁻ (weak field).

Answer

Linear

Answer

Octahedral

Answer

Tetrahedral

Question 2

Kerala's diverse topography and heavy rainfall lead to the formation of various soil types. Among these, laterite soils are prominent. Which of the following statements most accurately describes laterite soils and their agricultural significance in Kerala?

Accepted Answer

B. Formed under conditions of high temperature and heavy rainfall, they are rich in iron and aluminium oxides, suitable for crops like cashew, tapioca, and rubber. — Laterite soils in Kerala are formed due to intense leaching under high temperature and heavy rainfall, leading to a high concentration of iron and aluminium oxides. While generally less fertile due to low organic matter and nitrogen, they are well-suited for crops like cashew, tapioca, and rubber with appropriate soil management practices. Options A, C, and D describe characteristics of other soil types (alluvial, black, and sandy coastal soils, respectively) or misrepresent laterite soil properties and their agricultural uses.

Answer

A. They are rich in humus and nitrogen, making them highly productive for intensive paddy cultivation in low-lying areas.

Answer

C. Characterized by fine particles and high moisture retention capacity, they are ideal for growing cotton and sugarcane in highland regions.

Answer

D. They are porous and sandy, primarily found along coastal plains, supporting coconut and limited vegetable farming due to low fertility.

Question 3

India's Look East Policy (1991) became:

Accepted Answer

Act East Policy (2014 under Modi) — PV Narasimha Rao launched Look East (1991). Modi upgraded to Act East (2014) — emphasising active engagement with ASEAN, Japan, Korea, Pacific.

Answer

Look West

Answer

Look North

Answer

Look South

Question 4

The direction of magnetic field around a straight current-carrying wire is given by:‌​‍

Accepted Answer

Right-hand thumb rule — Thumb in direction of current; curled fingers show magnetic field direction.‌​‍

Answer

Fleming's left-hand rule

Answer

Fleming's right-hand rule

Answer

Lenz's law

Question 5

Kerala Chief Minister's Disaster Relief Fund:‌​‍

Accepted Answer

CMDRF — CMDRF.‌​‍

Answer

KDRF

Answer

CM Relief

Answer

Both names used

Question 6

Household wiring uses which circuit?‌​‍

Accepted Answer

Parallel — Parallel circuit — if one appliance fails, others keep working. ‌​‍Voltage remains same across all.

Answer

Series

Answer

Mixed

Answer

None

Question 7

Who is the first Malayali Oscar winner?‌​‍

Accepted Answer

Resul Pookutty — Resul Pookutty won the Academy Award for Best Sound Mixing for Slumdog Millionaire (2009).‌​‍

Answer

M.T. Vasudevan Nair

Answer

Adoor Gopalakrishnan

Answer

Shaji N. Karun

Question 8

Avogadro's number is approximately:‌​‍

Accepted Answer

6.022 × 10²³ — NA = 6.02214076 × 10²³ mol⁻¹ (exact SI definition since 2019).‌​‍

Answer

9.1 × 10⁻³¹

Answer

1.6 × 10⁻¹⁹

Answer

6.022 × 10¹⁹

Question 9

Acculturation refers to:‌​‍

Accepted Answer

Process where one culture adopts traits of another through contact — Acculturation involves cultural exchange and change through prolonged contact. ‌​‍Assimilation is fuller absorption into dominant culture.

Answer

Learning own culture

Answer

Enculturation

Answer

Assimilation only

Question 10

Which lipoprotein is primarily responsible for transporting cholesterol from peripheral tissues back to the liver, a process crucial for preventing atherosclerosis?

Accepted Answer

A. High-Density Lipoprotein (HDL) — High-Density Lipoprotein (HDL) is often referred to as 'good cholesterol' because its primary function is reverse cholesterol transport, meaning it removes cholesterol from peripheral cells and transports it back to the liver for excretion or recycling. Low-Density Lipoprotein (LDL) delivers cholesterol to cells, and high levels contribute to plaque formation. VLDL transports triglycerides from the liver, and chylomicrons transport dietary fats.

Answer

B. Low-Density Lipoprotein (LDL)

Answer

C. Very Low-Density Lipoprotein (VLDL)

Answer

D. Chylomicrons

VFA Mixed Practice Test #251