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Question : A bus moving at 40 km/hr covers a distance in 6 hours 15 minutes. If it travels the same distance at 50 km/hr, how long will it take to cover the distance?
Option 1: 2 hours
Option 2: 6 hours
Option 3: 4 hours
Option 4: 5 hours
Correct Answer: 5 hours
Solution : Speed = 40 km/hr Time = 6 hr 15 min = 6.35 hours Distance = Speed $\times$ Time = 40 $\times$ 6.25 ⇒ Distance = 250 km Now, speed = 50 km/hr Distance is the same as the distance covered by the bus with
Question : Who among the following discovered the neutrons?
Option 1: J. Chadwick
Option 2: E. Goldstein
Option 3: Neils Bohr
Option 4: Ernest Rutherford
Correct Answer: J. Chadwick
Solution : The correct option is J. Chadwick.
The neutron was discovered by Sir James Chadwick in 1932. Chadwick was a British physicist, and his discovery of the neutron provided crucial insight into the structure of the atom. Neutrons, along with protons, are subatomic particles found
Question : Surface water is a better source of drinking water because it is poor in
Option 1: Dust
Option 2: Bacteria
Option 3: Arsenic
Option 4: Algae
Correct Answer: Arsenic
Solution : The correct answer is Arsenic.
Due to its low arsenic content, surface water is a preferable source of drinking water. Rocks and soil contain the naturally occurring metal arsenic. Additionally, it can infiltrate water sources due to human activity like mining, and smelting. Cancer, heart
Question : A train crosses a stationary pole completely in 18 seconds and a bridge completely in 44 seconds. If the length of the bridge is 650 meters, then what is the length of the train?
Option 1: 540 m
Option 2: 360 m
Option 3: 450 m
Option 4: 270 m
Correct Answer: 450 m
Solution : Let the length of the train be $l$ and the speed of the train be $s$. Time = 18 sec So, $s = \frac{l}{18}$ --------(i) Length of the bridge = 650 m Total distance = $650+l$ Time = 44 sec $s = \frac{650+l}{44}$ --------(ii)
Question : Directions: In the following question, find the odd number from the given alternatives.
Option 1: 95
Option 2: 145
Option 3: 114
Option 4: 152
Correct Answer: 145
Solution : Let's check the given options –
First option: 95; 95 ÷ 19 = 5 Second option: 145; 145 is not divisible by 19. Third option: 114; 114 ÷ 19 = 6 Fourth option: 152; 152 ÷ 19 = 8
So, 145 is not divisible by
Question : What is the number of common tangents that can be drawn to two circles that touch each other externally?
Option 1: 2
Option 2: 4
Option 3: 3
Option 4: 1
Correct Answer: 3
Solution : Only three tangents can be drawn passing through two external touching circles. Hence, the correct answer is 3.
Question : A and B can do a piece of work in 36 days. B and C can do the same work in 60 days. A and C can do the same work in 45 days. In how many days can A alone complete the same work?
Option 1: 90
Option 2: 60
Option 3: 120
Option 4: 45
Correct Answer: 90
Solution : According to the question, Let the total Work = LCM of 36, 60 and 45 = 180 The efficiency of (A + B) = $\frac{180}{36}$ = 5 units/day The efficiency of (B + C) = $\frac{180}{60}$ = 3 units/day The efficiency of (C + A)
Question : $\triangle$XYZ is right angled at Y. If $\cos X=\frac{3}{5}$, then what is the value of $\operatorname{cosec}Z$?
Option 1: $\frac{3}{4}$
Option 2: $\frac{5}{3}$
Option 3: $\frac{4}{5}$
Option 4: $\frac{4}{3}$
Correct Answer: $\frac{5}{3}$
Solution : Given: $\triangle$XYZ is right-angled at Y and $\cos X=\frac{3}{5}$ Since $\triangle$XYZ is right-angled at Y, So, X + Z = 90° ⇒ X = 90° – Z Now, $\cos X=\frac{3}{5}$ ⇒ $\cos(90°–Z)=\frac{3}{5}$ ⇒ $\sin Z=\frac{3}{5}$ $\therefore\operatorname{cosec}Z=\frac{5}{3}$ [$\because$ $\operatorname{cosec}Z=\frac{1}{\sin Z}$] Hence, the correct answer is $\frac{5}{3}$.
Question : Which among the following is incorrect about the salient features of the 73rd Amendment Act?
Option 1: The Act gives a Constitutional status to the Panchayati Raj Institutions
Option 2: It contains 29 functional items of the Panchayats and deals with Articles 243 to 243(O)
Option 3: The act has added the Eleventh Schedule to the Constitution of India
Option 4: The act corresponds to Part III of the Constitution of India
Correct Answer: The act corresponds to Part III of the Constitution of India
Solution : The correct answer is The act corresponds to Part III of the Constitution of India.
Part IX of the Indian Constitution (The Panchayats) was included by the 73rd Constitution Amendment Act of 1992. It
Question : The hydrophilic nature of DNA is due to the presence of:
Option 1: thymine base
Option 2: many hydrogen bonds
Option 3: phosphate group
Option 4: deoxyribose sugar
Correct Answer: phosphate group
Solution : The correct option is the phosphate group.
Being hydrophilic refers to having an affinity for water or having the ability to interact with it by forming hydrogen bonds. Due to the presence of phosphate groups, which have a negative charge from extra electrons, and
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