Plus 2 Lecturer Mixed Practice Test #711

Question 1

Dark spot at centre of Newton's rings (reflected light) is due to:

Accepted Answer

Destructive interference (π phase on denser medium reflection) — Not in XI SCERT. At point of contact, path difference ≈ 0 but π phase change on glass reflection causes destructive interference.

Answer

Constructive

Answer

Dispersion

Answer

Diffraction

Question 2

999 × 999:

Accepted Answer

998001 — 999²=998001.

Answer

999000

Answer

1000000

Answer

998999

Question 3

Chirality in organic molecules requires:‌​‍

Accepted Answer

sp³ carbon bonded to four different groups — Stereocenter. ‌​‍Pair of enantiomers rotate plane of polarized light oppositely. Important in drugs (thalidomide disaster).

Answer

sp carbon

Answer

sp² carbon

Answer

Double bond

Question 4

Penicillin was discovered in:‌​‍

Accepted Answer

1928 — Alexander Fleming discovered Penicillin in 1928. Nobel Prize 1945.‌​‍

Answer

1920

Answer

1935

Answer

1945

Question 5

Idiom 'rain cats and dogs':‌​‍

Accepted Answer

Heavy rain — Rain very heavily.‌​‍

Answer

Animals falling

Answer

Light drizzle

Answer

Storm

Question 6

Akash SAM exports:‌​‍

Accepted Answer

To Armenia — First export of Akash to Armenia.‌​‍

Answer

US

Answer

None

Answer

Cancelled

Question 7

Neutrino hypothesis proposed by:

Accepted Answer

Pauli (to conserve energy in β-decay) — 1930 'desperate remedy'. Named by Fermi. Detected 1956 (Cowan-Reines). Kajita-McDonald Nobel 2015 for neutrino oscillations.

Answer

Fermi

Answer

Dirac

Answer

Heisenberg

Question 8

Continuous and Comprehensive Evaluation (CCE) as adopted in educational systems primarily aims to:

Accepted Answer

C. Ensure holistic development of learners by assessing both scholastic and co-scholastic aspects. — CCE emphasizes a holistic approach to evaluation, assessing not only academic achievements (scholastic) but also life skills, attitudes, values, and co-curricular activities (co-scholastic) on a continuous basis. It aims for a comprehensive understanding of a child's development, moving beyond just rote learning and terminal exams. It does not eliminate examinations but integrates them with other assessment tools.

Answer

A. Reduce the workload of teachers by simplifying evaluation methods.

Answer

B. Focus solely on academic performance in terminal examinations.

Answer

D. Eliminate all forms of examinations and rely only on observation.

Question 9

Which of the following bones is part of the axial skeleton?

Accepted Answer

C. Ribs — The axial skeleton forms the central axis of the body and includes the skull, vertebral column, and thoracic cage (ribs and sternum). The femur (thigh bone), humerus (upper arm bone), and tibia (shin bone) are all part of the appendicular skeleton, which consists of the limbs and their girdles.

Answer

A. Femur

Answer

B. Humerus

Answer

D. Tibia

Question 10

Valley of Flowers National Park is in which state?

Accepted Answer

Uttarakhand — Valley of Flowers in Uttarakhand is a UNESCO World Heritage Site known for its endemic alpine flowers.

Answer

Himachal Pradesh

Answer

Jammu & Kashmir

Answer

Sikkim

Plus 2 Lecturer Mixed Practice Test #711