DCOA Mixed Practice Test #51

Question 1

Frantz Fanon's major work on decolonisation was:‌​‍

Accepted Answer

Both — Fanon: Black Skin White Masks (1952) on colonial psychology; The Wretched of the Earth (1961) — manifesto of decolonisation.‌​‍

Answer

Black Skin, White Masks

Answer

The Wretched of the Earth (1961)

Answer

Neither

Question 2

Unit of capacitance:‌​‍

Accepted Answer

Farad — Farad (F).‌​‍

Answer

Ohm

Answer

Weber

Answer

Henry

Question 3

Gravitational force between two masses is proportional to:

Accepted Answer

Product of masses — Newton's law of gravitation: F = G·m₁m₂/r².

Answer

Sum of masses

Answer

Difference of masses

Answer

Cube of distance

Question 4

Choose the odd one: Smart, Brilliant, Honest, Bright

Accepted Answer

Honest — Smart/Brilliant/Bright relate to intelligence; Honest is a moral trait.

Answer

Smart

Answer

Brilliant

Answer

Bright

Question 5

Coriolis force arises from:

Accepted Answer

Earth's rotation — Deflects moving objects right in NH, left in SH. Zero at equator. Affects winds, ocean currents, cyclones.

Answer

Gravity

Answer

Ocean tides

Answer

Solar wind

Question 6

In the modern periodic table, elements are arranged primarily based on which fundamental property?

Accepted Answer

B. Atomic number — The modern periodic table arranges elements in order of increasing atomic number (number of protons), which determines their chemical properties and periodic trends. While atomic mass was initially used by Mendeleev, the discovery of isotopes and the concept of atomic number refined the arrangement.

Answer

A. Atomic mass

Answer

C. Number of neutrons

Answer

D. Density

Question 7

The catalyst in Ostwald process (NH₃ → HNO₃) is:‌​‍

Accepted Answer

Pt (platinum-rhodium gauze) — Ostwald process: NH₃ + O₂ → NO + H₂O over Pt-Rh at 800 °C.‌​‍

Answer

Fe

Answer

V₂O₅

Answer

Ni

Question 8

At 25 °C, the ionic product of water (Kw) is:

Accepted Answer

10⁻¹⁴ — Kw = [H⁺][OH⁻] = 10⁻¹⁴ at 25 °C.

Answer

10⁻⁷

Answer

10⁻¹

Answer

1

Question 9

The SI unit of acceleration is:

Accepted Answer

m/s² — Acceleration = change in velocity / time; SI unit is m/s².

Answer

m/s

Answer

km/h

Answer

N/kg

Question 10

What was the original name of Thycaud Ayya?‌​‍

Accepted Answer

Subbarayan — Subbarayan was the original name of Thycaud Ayya Swami.‌​‍

Answer

Muthukutty

Answer

Mudisoodum Perumal

Answer

Kunjikannan

DCOA Mixed Practice Test #51