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Past Questions — 2019
The discriminant of a quadratic equation is less than 0, then the equation has
A)
no real roots
B)
two unequal roots
C)
two equal roots
D)
none of these
For a quadratic equation ax^2 + bx + c = 0, the discriminant is D = b^2 - 4ac. If D < 0, then the square root of the discriminant is imaginary, so the equation has no real roots. Hence, the correct option is (a). Option (b) occurs when D > 0, and option (c) occurs when D = 0.
National Panchayati Raj Day is observed every year on:
A)
21st April
B)
22nd April
C)
23rd April
D)
24th April
National Panchayati Raj Day is observed every year on 24th April. It commemorates the date when the 73rd Constitutional Amendment Act came into force in 1993, giving constitutional status to Panchayati Raj institutions in India. Therefore, option (d) is correct.
Which city is known as the ‘City of Cosmonauts’?
A)
Los Angeles
B)
San Francisco
C)
Moscow
D)
New York
Moscow is known as the 'City of Cosmonauts' because of its strong association with the Soviet space program and cosmonaut training. The other options are not known by this title.
Who has become the first Indian to become a member of FIFA Executive Council?
A)
Priya Ranjan Das Munshi
B)
Praful Patel
C)
Kushal Das
D)
Sunando Dhar
Praful Patel became the first Indian to be elected as a member of the FIFA Executive Committee/Council. Priya Ranjan Das Munshi was an important football administrator and former AIFF president, but he was not the first Indian on FIFA's Executive Council. Kushal Das and Sunando Dhar are not associated with that milestone.
If 3a = 4b = 5c, then a : b : c is:
A)
15 : 20 : 16
B)
20 : 15 : 12
C)
16 : 20 : 18
D)
15 : 25 : 30
Let 3a = 4b = 5c = k. Then a = k/3, b = k/4, and c = k/5. Taking the LCM of 3, 4, and 5 as 60, we get a : b : c = 20 : 15 : 12. However, among the given options, this corresponds to option (b), not (a). So the correct ratio is 20 : 15 : 12.
Who is the incumbent Minister of Youth Affairs and Sports?
A)
Rajyavardhan Singh Rathore
B)
Vijay Goel
C)
Jitendra Singh
D)
Kiren Rijiju
The incumbent Minister of Youth Affairs and Sports at the relevant time was Kiren Rijiju. Rajyavardhan Singh Rathore and Vijay Goel were earlier holders of the portfolio, while Jitendra Singh handled other ministries, not Youth Affairs and Sports.
The species of Snake known as ‘rain-loving snake’ recently discovered in Mizoram is:
A)
Smithophis Atemporalis
B)
Smithophis Bicolor
C)
Smithophis Natricine
D)
Smithophis Malabar
The ‘rain-loving snake’ recently reported from Mizoram is **Smithophis atemporalis**. This species belongs to the genus Smithophis, known for hill-stream or rain-loving habits. Among the given options, only **Smithophis Atemporalis** matches the newly discovered Mizoram species. The other options are incorrect: **Smithophis bicolor** is a different species, **Smithophis natricine** is not a valid species name here, and **Smithophis malabar** refers to a species associated with the Malabar region, not Mizoram.
Antibiotics was discovered by:
A)
Robert Hooke
B)
Jean Baptiste-Denys
C)
Alexander Fleming
D)
Charles Richet
Antibiotics were discovered by Alexander Fleming. In 1928, he observed that the mold Penicillium notatum inhibited the growth of bacteria, leading to the discovery of penicillin, the first true antibiotic. Robert Hooke is known for microscopy and cell theory-related observations, Jean Baptiste-Denys for early blood transfusions, and Charles Richet for work on anaphylaxis, not antibiotics.
Who invented DDT?
A)
Robert Koch
B)
Paul Hermann Muller
C)
Samuel Hanemann
D)
Watson & Arthur
DDT (dichloro-diphenyl-trichloroethane) was discovered for its insecticidal properties by Paul Hermann Müller in 1939. He was later awarded the Nobel Prize in Physiology or Medicine in 1948 for this discovery. Robert Koch was a bacteriologist, Samuel Hahnemann founded homeopathy, and Watson & Crick are known for the DNA double-helix model.
The real name of PS Golay who has defeated the longest serving Sikkim Chief Minister Pawan Chamling was:
A)
Prem Singh Tamang
B)
Padamjit Singh Tamang
C)
Prakash Singh Tamang
D)
Pawan Singh Tamang
P. S. Golay is the popular name of Sikkim politician Prem Singh Tamang. He defeated Pawan Chamling in the 2019 Sikkim Assembly election, ending Chamling’s long tenure as Chief Minister. The other options are not his known real name.
The full form of PUBG is:
A)
Player Underground Battle Ground
B)
Player Unknown Battle Ground
C)
Player Ultimate Battle Ground
D)
Player Uncharted Battle Ground
PUBG stands for 'PlayerUnknown's Battlegrounds,' commonly written in MCQ form as 'Player Unknown Battle Ground.' Option (b) is the closest and intended correct answer. The other options are incorrect because 'Underground,' 'Ultimate,' and 'Uncharted' are not part of the expansion.
The area of an equilateral triangle whose sides are 4 cm is
A)
83 cm2
B)
43 cm2
C)
243 cm2
D)
163 cm2
For an equilateral triangle, area = (√3 / 4) × a². Here side a = 4 cm, so area = (√3 / 4) × 16 = 4√3 cm². Therefore, the correct option is (b).
Zero of the zero polynomial is:
A)
0
B)
1
C)
Any real number
D)
Not defined
The zero polynomial is the polynomial in which all coefficients are zero. Its value remains 0 for every real number substituted for the variable. Therefore, every real number is a zero of the zero polynomial. Option (a) is wrong because 0 is only one such number, not the only one. Option (b) is incorrect. Option (d) is also incorrect in the usual school-level definition.
The longest south-ward flowing river in Mizoram is:
A)
Khawthlangtuipui
B)
Chhimtuipui
C)
Tiau
D)
Tuichâng
The longest southward-flowing river in Mizoram is the Chhimtuipui (also known as the Kaladan in its lower course). It flows generally southward and is regarded as the longest river system in Mizoram.
Why others are incorrect:
- Khawthlangtuipui: not the longest southward-flowing river.
- Tiau: a boundary river, but shorter than Chhimtuipui.
- Tuichâng: an important river in central Mizoram, but not the longest southward-flowing one.
So, the correct answer is Chhimtuipui.
Which airport was named as the Best Airport in the World according to the Skytrax Word Airport Awards?
A)
Changi Airport
B)
Beijing Airport
C)
Dubai International Airport
D)
Heathrow Airport
The Skytrax World Airport Awards named Singapore’s Changi Airport as the Best Airport in the World. It is widely recognized for its facilities, passenger service, and overall airport experience. The other options were not named best airport in the world in Skytrax awards.
Which institute has recently announced the creation of the Amartya Sen Chair in Inequality Studies?
A)
Harvard Kennedy School
B)
Oxford University
C)
Standford University
D)
London School of Economics and Political Science
The Amartya Sen Chair in Inequality Studies was announced by Oxford University. This chair is associated with work on inequality studies and honours economist Amartya Sen. The other options do not match the announcement: Harvard Kennedy School, Stanford University, and London School of Economics were not the institution that created this specific chair.
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