DCOA Mixed Practice Test #46

Question 1

Polaroid absorbs:‌​‍

Accepted Answer

Light polarised perpendicular to transmission axis — Malus's law: I = I₀ cos²θ. ‌​‍Natural light is unpolarised; Polaroid makes it 50% intensity, linearly polarised.

Answer

Only red

Answer

All light

Answer

Only UV

Question 2

Who was the first recipient of the Jnanpith Award?‌​‍

Accepted Answer

G. Sankara Kurup (Malayalam, 1965) — For 'Odakkuzhal'. ‌​‍Malayalam's first Jnanpith. Other Malayalam Jnanpith: SK Pottekkatt, Thakazhi, MT Vasudevan Nair, ONV Kurup, Akkitham.

Answer

Premchand

Answer

Tagore (Nobel not Jnanpith)

Answer

Nirala

Question 3

Adam Smith:‌​‍

Accepted Answer

Father of Economics — 'Wealth of Nations' (1776).‌​‍

Answer

Father of Physics

Answer

Father of Chemistry

Answer

Father of Biology

Question 4

Translocation of food from leaves to other parts of the plant takes place through:‌​‍

Accepted Answer

Phloem — Phloem transports sugars produced by photosynthesis throughout the plant.‌​‍

Answer

Epidermis

Answer

Xylem

Answer

Cambium

Question 5

Milk teeth count:‌​‍

Accepted Answer

20 — 20 deciduous teeth.‌​‍

Answer

18

Answer

28

Answer

24

Question 6

Athenian democracy emerged under:

Accepted Answer

Solon reforms → Cleisthenes (~508 BCE) — Cleisthenes (~508 BCE) — reformed Athens into direct democracy. Pericles later expanded (mid-5th C).

Answer

Alexander

Answer

Augustus

Answer

Pericles alone

Question 7

The simplest hydrocarbon is:‌​‍

Accepted Answer

Methane — CH₄ — one carbon, four hydrogens — simplest alkane.‌​‍

Answer

Ethene

Answer

Ethyne

Answer

Ethane

Question 8

Memory stages (Atkinson-Shiffrin model):‌​‍

Accepted Answer

Sensory memory, Short-term memory, Long-term memory — Sensory: milliseconds. ‌​‍STM (working memory): ~30 s, 7±2 items. LTM: potentially permanent.

Answer

Only STM

Answer

Only LTM

Answer

No stages

Question 9

Hitler became German Chancellor in:

Accepted Answer

1933 — Adolf Hitler appointed Chancellor 30 January 1933. Enabling Act March 1933 gave dictatorial powers. Became Führer 1934.

Answer

1918

Answer

1923

Answer

1939

Question 10

Richter scale logarithmic by factor:

Accepted Answer

10 in amplitude — Each whole number 10× amplitude.

Answer

100

Answer

2

Answer

5

DCOA Mixed Practice Test #46