HSSC CLERK EXAM (21.09.2019)

Total Questions: 100

11. The metallurgical process in which depressant is used

(1) Roasting
(2) Froth floatation
(3) Electrolytic refining of A
(4) Calcination

Correct Answer: (2) Froth floatation

Solution:Depressants are used in froth floatation process where they help to separate two sulphide ores by selective prevention of froth formation by one ore and allowing the other to come into froth. For example, in order to separate two sulphide ores (ZnS and Pbs), NaCN is used as a depressant.It selectively allows PbS form froth, but prevents ZnS from coming to froth. This happens due to the fact that NaCN reacts with ZnS to form Na2[Zn(CN)4] 4NaCN + ZnS → Na₂[Zn(CN)₄ + Na₂S

12. Resistance of which metal is least ?

(1) Gold
(2) Silver
(3) Copper
(4) Aluminium

Correct Answer: (2) Silver

Solution:The most electrically conductive element is silver, followed by copper, gold and aluminium. Electrical conductivity is the reciprocal quantity of resistivity. So, silver has least resistance and Aluminium the highest resistance among the given metals.

13. Blood vessels which carry blood from organ to heart

(1) Artery
(2) Vein
(3) Artery and vein both
(4) None of these

Correct Answer: (2) Vein

Solution:There are three main types of blood vessels: arteries, veins and capillaries. Arteries carry oxygen rich blood away from the heart to all of the body's tissues. Capillaries are small, thin blood vessels that connect the arteries and the veins. Veins carry the blood from organs to the heart; this blood contains less oxygen and is rich in waste products that are to be excreted or removed from the body.

14. Which is not necessary for photosynthesis ?

(1) Carbon dioxide
(2) Oxygen
(3) Chlorophyll
(4) Sunlight

Correct Answer: (2) Oxygen

Solution:To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. By taking in water (H₂O) through the roots, carbon dioxide (CO₂) from the air, and light energy from the Sun. Chlorophyll, a green photosynthetic pigment, is essential for the process as it allows plants to absorb energy from light.

15. A device used for producing electric current is called a

(1) Generator
(2) Motor
(3) Ammeter
(4) Galvanometer

Correct Answer: (1) Generator

Solution:Electrical generator is used for producing electric current. It converts motive power (mechanical energy) into electrical power for use in an external circuit. Sources of mechanical energy include steam turbines, gas turbines, water turbines, internal combustion engines, etc.Generators work on the principle of electromagnetic induction.

16. Out of the given alternatives, choose the one which best expresses the meaning of the given word.

LUDICROUS

(1) Absurd
(2) Clear
(3) Simple
(4) Dismal

Correct Answer: (1) Absurd

Solution:Ludicrous (Adjective) = ridiculous; stupid and silly; unreasonable and deserving to be laughed at; absurd; farcical.

Look at the sentence:

Some stories that initially seemed ludicrous turned out to be true.

Dismal (Adjective) = causing or showing sadness; depressing; very bad.

17. Choose the word opposite in meaning to the given word.

CARNAL

(1) Sensuous
(2) Spiritual
(3) Visionary
(4) Imaginary

Correct Answer: (2) Spiritual

Solution:Carnal (Adjective) = relating to the physical feelings and wants of the body; sensual; temporal; worldly; Spiritual

(Adjective) = relating to deep feelings and beliefs (religious); ethereal; immaterial; divine.

Look at the sentences:

The preacher warned that those who were interested only in carnal pursuits would not see the kingdom of heaven. Traditional ways of life fulfilled both economic and spiritual needs.

Imaginary (Adjective) = unreal; fictional; non-existent.

Visionary (Adjective/Noun) = imaginative; insightful.

18. Out of the four alternatives, choose the one which best conveys the meaning of the phrase.

An old unmarried woman.

(1) Virgin
(2) Bachelor
(3) Spinster
(4) Matron

Correct Answer: (3) Spinster

Solution:Virgin = a person who has never had sexual intercourse; a person with no experience of particular activity.

Matron (Noun) = a nurse who is in charge of the other nurses in a hospital. Bachelor (Noun) a man who has not yet married; a person who has a first university degree.

19. Fill in the blank with appropriate preposition choosing from the four alternatives given below the sentence:

The lives of great men inspire us____hopes of bright future.

(1) to
(2) with
(3) of
(4) for

Correct Answer: (2) with

Solution:He inspired his students with a vision of freedom.

20. Choose the correctly spelt word.

(1) Menacious
(2) Mendacous
(3) Meancious
(4) Mendacious

Correct Answer: (4) Mendacious

Solution:Mendacious (Adjective) = not telling the truth; lying; untruthful

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