Junior Clerk Mixed Practice Test #686

Question 1

A laboratory technician is performing a preliminary screening for the presence of alkaloids in a plant extract. Which of the following reagents is commonly used as a general precipitating reagent for alkaloids, forming characteristic precipitates?

Accepted Answer

C. Mayer's reagent — Mayer's reagent (potassium mercuric iodide) is a widely used general reagent for the detection of alkaloids. It forms a creamy white precipitate with most alkaloids due to the formation of alkaloid-iodide complexes. Benedict's and Fehling's reagents are used for reducing sugars, while Biuret reagent is used for proteins.

Answer

A. Benedict's reagent

Answer

B. Fehling's solution

Answer

D. Biuret reagent

Question 2

Deepa Karmakar qualified for Rio 2016 Olympics after defeating:‌​‍

Accepted Answer

Oksana Chusovitina — Deepa qualified at Rio test event (2016), defeated by Oksana Chusovitina in some rounds; she became first Indian female gymnast to qualify for Olympics.‌​‍

Answer

Yelena Produnova

Answer

Aliya Mustafina

Answer

Simone Biles

Question 3

Limestone (CaCO₃) in the blast furnace acts as:

Accepted Answer

Flux to remove silica impurity — CaCO₃ → CaO + CO₂; CaO + SiO₂ → CaSiO₃ (slag).

Answer

Oxidising agent

Answer

Main fuel

Answer

Reducing agent

Question 4

A clock seen through a mirror when time is 7 o'clock shows:‌​‍

Accepted Answer

5:00 — Mirror image of 7 o'clock = 5:00 (reflection inverts left-right).‌​‍

Answer

7:00

Answer

3:20

Answer

4:20

Question 5

The smallest country in the world by area is:‌​‍

Accepted Answer

Vatican City — Vatican City (~0.44 sq km) is the smallest country in the world by area. ‌​‍It is also the least populous sovereign state.

Answer

Monaco

Answer

San Marino

Answer

Liechtenstein

Question 6

The collective noun for a group of sheep is:‌​‍

Accepted Answer

Flock — Sheep/birds → flock; cattle → herd; wolves → pack; fish → school.‌​‍

Answer

Pack

Answer

Herd

Answer

School

Question 7

Arrange Kerala districts by descending 2011 Census population: (1) Thiruvananthapuram (2) Thrissur (3) Malappuram (4) Ernakulam‌​‍

Accepted Answer

Malappuram, Thiruvananthapuram, Thrissur, Ernakulam — 2011 Census: Malappuram > Thiruvananthapuram > Thrissur > Ernakulam.‌​‍

Answer

Malappuram, Thrissur, Ernakulam, Thiruvananthapuram

Answer

Malappuram, Ernakulam, Thiruvananthapuram, Thrissur

Answer

Malappuram, Thiruvananthapuram, Ernakulam, Thrissur

Question 8

If WORDING is coded as GODRINW, how will TOUGHEN be coded?‌​‍

Accepted Answer

NOGUHET — Scheme: re-order letters of 7-letter word as positions (7,2,4,3,5,6,1). ‌​‍WORDING → G(7),O(2),D(4),R(3),I(5),N(6),W(1) = GODRINW ✓. Apply to TOUGHEN: N(7),O(2),G(4),U(3),H(5),E(6),T(1) = NOGUHET.

Answer

NOGUTEH

Answer

NOGUHTE

Answer

NOHUGET

Question 9

Kerala Assembly Elections 2026 were held on:‌​‍

Accepted Answer

9 April 2026 — Polling for 140 seats was held on 9 April 2026. ‌​‍Counting is scheduled for 4 May 2026.

Answer

2 April 2026

Answer

16 April 2026

Answer

23 April 2026

Question 10

If ROSE is coded as 6821, then 1862 = ?‌​‍

Accepted Answer

SORE — R=6,O=8,S=2,E=1. 1=E,8=O,6=R,2=S → SORE.‌​‍

Answer

ROES

Answer

ESRO

Answer

ESOR

Junior Clerk Mixed Practice Test #686