Plus 2 Lecturer Mixed Practice Test #452

Question 1

Standard electrode potential of SHE (Standard Hydrogen Electrode):‌​‍

Accepted Answer

0.0 V (reference) — H⁺ + e⁻ ⇌ ½H₂ at 1 atm, 1 M, 25°C. ‌​‍Reference for all other electrode potentials.

Answer

-1.0

Answer

+0.76

Answer

+1.0

Question 2

Colour blindness in humans is typically:‌​‍

Accepted Answer

X-linked recessive — Red-green colour blindness is X-linked recessive; affects more males.‌​‍

Answer

Acquired only

Answer

Autosomal dominant

Answer

Viral

Question 3

Which of the following is a Grignard reagent?‌​‍

Accepted Answer

CH₃MgBr (organomagnesium halide) — RMgX + carbonyl compounds → alcohols after acidic workup. ‌​‍Discovered 1900; Nobel 1912.

Answer

Only alcohol

Answer

NaOH

Answer

RCOOH

Question 4

Which animals are protected in Periyar Wildlife Sanctuary?‌​‍

Accepted Answer

Tigers and elephants — Tigers, elephants, Nilgiri langur.

Answer

Rhino

Answer

Lion

Answer

Hornbill only

Question 5

The enzyme that fixes CO₂ in Calvin cycle is:‌​‍

Accepted Answer

RuBisCO — RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) — most abundant protein on Earth.‌​‍

Answer

DNA polymerase

Answer

ATP synthase

Answer

Amylase

Question 6

The first Indian communication satellite was:‌​‍

Accepted Answer

APPLE — APPLE (Ariane Passenger Payload Experiment, 1981) was India's first experimental communication satellite. ‌​‍INSAT-1A (1982) was the first operational one.

Answer

Aryabhata

Answer

Rohini

Answer

INSAT-1A

Question 7

'Brace position' in aviation safety instructions refers to:

Accepted Answer

A protective body position during crash landings — Brace position protects head, neck and limbs during impact.

Answer

A saluting gesture

Answer

An emergency exit

Answer

A life jacket

Question 8

A Block Development Officer (BDO) in a drought-prone district is tasked with ensuring sustainable water supply under the Jal Jeevan Mission (JJM). The district has historically relied on groundwater, which is now depleting. To ensure the long-term success of JJM in this region, which of the following approaches is most critical for the BDO to prioritize?

Accepted Answer

B. Promoting rainwater harvesting and groundwater recharge structures. — While Functional Household Tap Connections (FHTCs) are a primary deliverable of JJM, ensuring the sustainability of the water source is paramount, especially in drought-prone areas with depleting groundwater. Promoting rainwater harvesting and groundwater recharge directly addresses the long-term availability of water, making the FHTCs truly functional and sustainable. Focusing solely on surface water might not be feasible everywhere, and water quality monitoring, while important, does not address source depletion.

Answer

A. Expediting the installation of Functional Household Tap Connections (FHTCs).

Answer

C. Focusing solely on surface water sources like rivers and reservoirs.

Answer

D. Implementing a robust water quality monitoring system.

Question 9

Study of coins:

Accepted Answer

Numismatics — Numismatics.

Answer

Philately

Answer

Epigraphy

Answer

Calligraphy

Question 10

The angle of elevation of the top of a tower 100 m tall from a point 100 m away from its base is:

Accepted Answer

45° — tan θ = opposite/adjacent = 100/100 = 1 → θ = 45°.

Answer

30°

Answer

60°

Answer

90°

Plus 2 Lecturer Mixed Practice Test #452