General Science - in Hindi

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Ohm is a unit of measuring _________. /ओम‬, ________मापने की एक इकाई है ।

Resistance/ प्रतिरोध
Voltage/ वोल्टेज
Current/ धारा
Magnetic field /चुंबकीय क्षेत्र


Correct Answer :Resistance/ प्रतिरोध

Which one of the following is the largest terrestrial wild animal?/ निम्न मे से कौन­सा जन्तु सबसे बड़ा स्थलीय जीव है ?

Indian elephant/ भारतीय हाथी
African elephant/ अफ्रीकी हाथी
Blue whale / नीली ‫व्हे‬ल
White tiger/ सफ़ेद बाघ


Correct Answer :African elephant/ अफ्रीकी हाथी

A gas used as a disinfectant in drinking water is:/ एक गैस जिसका उपयोग जल को कीटाणु मुक्त (शुद्ध) करने के लिए किया जाता है , वह है :

Hydrogen/ हाइड्रोजन
Oxygen/ ऑक्सीजन
Fluorine/ फ्लोरिन
Chlorine/ क्लोरीन


Correct Answer :Chlorine/ क्लोरीन

Which among the following is called anti sterility vitamin?/निम्नलिखित में से कौन­सा नपुंसकता विरोधी विटामिन कहा जाता है ?

Vitamin­ D/ विटामिन­ डी
Vitamin­ A/ विटामिन ­ए
Vitamin­ E/ विटामिन­ ई
Vitamin­ K/ विटामिन ­के


Correct Answer :Vitamin ­E/ विटामिन­ ई

The gas predominantly responsible for global warming is:/ कौन­सी गैस ग्लोबल वार्मिंग के लिए मुख्य रूप से उत्तरदायी है ?

Carbon dioxide/ कार्बन डाइऑक्साइड
Carbon monoxide/ कार्बन मोनोऑक्साइड
Nitrous oxide/ नाइट्रस ऑक्साइड
Nitrogen peroxide/ नाइट्रोजन परऑक्साइड


Correct Answer :Carbon dioxide/ कार्बन डाइऑक्साइड

Blood clot inside a blood vessel is known as ?

A) Thrombosis
B) Agglutinin
C) Clot
D) Thrombus

Correct Answer :Thrombosis

Excess of water in urine resulting from kidney failure is known as ?

A) Ureotelic
B) Diabetes Malitus
C) Diabetes insipidus
D) None of these

Correct Answer :Diabetes insipidus

Vitamin B12 takes part in?

A)
increase in blood pressure

B)
decrease in blood pressure

C)
activating bone marrow

D)
maturation of RBC’s


Correct Answer :

maturation of RBC’s


Explanation :

Vitamin B12, is a water-soluble vitamin that has a key role in the normal functioning of the brain and nervous system, and the formation of red blood cells.

A boy watching Ramleela from a distance sees the effigy of Ravana bursting into flames & hears the explosion after 2 seconds because ?


रामलीला देख रहा एक लड़का रावण का पुतला दूरी से जलते हुए देखता है और 2 सेकंड के बाद विस्फोट सुनता है क्योकि?

A)
Sound travels faster than light

B)
Light travels faster than sound

C)
Both travel at the same speed

D)
It is persistence of vision


Correct Answer :

Light travels faster than sound


Explanation :

Light waves travel at 3x108 m/s in a vacuum whereas sound requires a medium to travel through limits its speed ,usually 340 m/s in the air but considerably faster in water.

The danger signals are red in colour because it is ?


खतरे का संकेत लाल रंगों के होते है क्योंकि?

A)
Least absorbed by fog or smoke

B)
Strongly absorbed by fog or smoke

C)
Least scattered by fog or smoke

D)
Strongly scattered by fog or smoke


Correct Answer :

Least scattered by fog or smoke


Explanation :

red which has the highest wavelength of all the colors, is used for danger signals is that red light is scattered the least by air molecules.So red light is able to travel the longest distance through fog, rain, and the alike.

The element of electrical heating device are usually made of?


इलेक्ट्रिकल हीटिंग डिवाइस का तत्व आम तौर पर बना होता है?

A)
Tungsten

B)
Bronze

C)
Nichrome

D)
Argon


Correct Answer :

Nichrome


Explanation :

Nichrome: Most heating elements use nichrome 80/20 (80% nickel, 20% chromium) wire, ribbon, or strip.
Nichrome 80/20 is an ideal material, because it has relatively high resistance and has high melting point of about 1400 degree centigrade.
Also Nichrome has a very low resistivity in the range of 10–8 Ωm to 10–6 Ωm and are good conductors of electricity.

Why are solor cooker painted black from inside?


सौर कुकर अंदर से काला क्यों रंगा जाता है?

A)
Black colour absorbs heat quickly

B)
Black colour is good reflector of heat

C)
To keep it neat

D)
None of the above


Correct Answer :

Black colour absorbs heat quickly


Explanation :

A solar cooker is a device which uses the energy of direct sunlight to heat, cook or pasteurise drink.

Inner wall of solar cooker is painted black because black colour is a good absorber of heat it absorbs heat and make the temperature hot inside the cooker.

Pick the common disorder of the respiratory tract ............?


शव्सन पथ के सामान्य विकार को चुनिए?

A)
Tetanus

B)
Asthma

C)
Jaundice

D)
Dysentery


Correct Answer :

Asthma


Explanation :

Asthma : A condition in which a person's airways become inflamed, narrow and swell and produce extra mucus, which makes it difficult to breathe.
Asthma may cause difficulty breathing, chest pain, cough and wheezing. The symptoms may sometimes flare up.

Name the vitamin that is needed by many enzymes and helps to maintain a healthy digestive tract and nervous system is ..........?


उस विटामिन का नाम दें जो एंजाइमों के लिए आवश्यक और पाचन तंत्र और तंत्रिका तंत्र को स्वस्थ बनाए रखने में मदद करता है?

A)
Vitamin-B2

B)
Vitamin-B3

C)
Vitamin-B4

D)
Vitamin-B12


Correct Answer :

Vitamin-B2


Explanation :

Vitamin B2, or riboflavin, is one of eight B vitamins that are essential for human health. It can be found in grains, plants, and dairy products. It is crucial for breaking down food components, absorbing other nutrients, and maintaining tissues.

The only property of a gas which is independent of the temperature at which it is ?


गैस का वह गुण जो उसके तापमान पर र्निभर नही करता?

A)
Kinetic energy

B)
Volumne

C)
Mass

D)
Pressure


Correct Answer :

Mass

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The angles of a triangle are in the ratio 2 : 4 : 3. The smallest angle of the triangle is?

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If the perimeter of a rectangle is 10 cm and the area is 4 cm2, then its length is?

Height and Distance

An aeroplane flying at a height of 300 m above the ground passes vertically above another plane at an instant when the angles of elevation of the two planes from the same point on the ground are 60º and 45º respectively. What is the height of the lower plane from the ground?

From the top of a building 90 m high, the angles of depression of the top and the bottom of a tree are 30º and 45º respectively. What is the height of the tree?

Trigonometry

What is the value of sinx √( 1 /1+cosx + 1 /1-cosx ) ?

What is cos4 A - sin4 A / cos2 A - sin2 A equal to?

If 7sin2 x +3cos2 x = 4, 0 < x < 90º ,then what is the value of tan x?

If x = a cosθ + b sinθ and y = a sinθ - b cosθ then what is x2 + y2 equal to?

Average

The mean of 5 numbers is 15. If one more number is included, the mean of the 6 numbers becomes 17. What is the included number?

The mean marks obtained by 300 students in a subject are 60. The mean of top 100 students was found to be 80 and the mean of last 100 students was found to be 50. The mean marks of the remaining 100 students are?

In an asymmetrical distribution, of the mean and median of the distribution are 270 and 220 respectively, then the mode of the data is?

Let a, b, c, d, e, f, g be consecutive even numbers and j, k, l, m, n be consecutive odd numbers. What is the average of all the numbers?

Alligation or Mixture

25 kg of alloy X is mixed with 125 kg of alloy Y. If the amount of lead and tin in the alloy X is the ratio 1 : 2 and the amount of lead and tin in the alloy Y is in the ratio 2 : 3, then what is the ratio of lead to tin in the mixture?

Simplification

The ratio of two numbers is 1 : 5 and their product is 320. What is the difference between the square of these two numbers?