General Science - in Hindi

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The oxide of Nitrogen used in medicine as anaesthetic is?/ बेहोशी की दवा केलिए उपयुक्त नाइट्रोजन  के ऑक्साइड का नाम क्या है?

Nitrogen pentoxide / नाइट्रोजन पेन्टोक्साइड
Nitrous oxide/ नाइट्रस ऑक्साइड
Nitric oxide/ नाइट्रिक ऑक्साइड
Nitrogen dioxide/ नाइट्रोजन डाइऑक्साइड

Correct Answer :Nitrogen pentoxide / नाइट्रोजन पेन्टोक्साइड

Which is the largest gland in the human body?/मानव शररि में सब से बडी ग्रंथि कौन सा है?

Lungs/ फेफड़ा
Liver/ कलेजा
Pitutary gland/ पीयूष ग्रंथि
Kidney/ गुर्दा

Correct Answer :Liver/ कलेजा

Commoncold, Influenza, Chickenpox and Measles are caused due to the attack of: / किन के आक्रमण के कारण आम सर्दी जुकाम चेचक और खसरा होता है ?

Virus only/ केवल विषाणु
Bacteria only/ केवल जीवाणु
Protozoa only/ केवल प्रजीवगण
Both virus and bacteria/ विषाणु और जीवाणु

Correct Answer :Virus only/ केवल विषाणु

Which among the following waves is used for communication by artificial satellites?
/ कृत्रिम उपग्रहों द्वारा संचार के लिए निम्नलिखित में से कौन सी तरंग प्रयोग की जाती है

Micro waves/ माइक्रो तरंगे
Radio waves/ रेडियो तरंगे
A.M/ ए एम
UV rays/ यू वी किरणें

Correct Answer :Micro waves/ माइक्रो तरंगे

Optical fibre is used for which purpose? / ऑप्टिकल फाइबर का प्रयोग कहाँ होता है?

CT scans/ सी टी स्कैन
X‐ray photos/ एक्स-रे किरण
Ultrasound scans/ अल्ट्रासाउंड स्कैन
Communication/ संचार

Correct Answer :Communication/संचार

The instrument used to measure the force and velocity of the wind is?

इस उपकरण से पवन का वेग और बल नापा जाता है?




पवन वेग मापी













Correct Answer :


Explanation :

An anemometer is an instrument that measures wind speed and wind pressureand.
Anemometers are important tools for meteorologists, who study weather patterns. They are also important to the work of physicists, who study the way air moves.

Which metal can deposit copper from copper sulphate solution? /कौन सा धातु तांबे सल्फेट विलयन से तांबे को जमा कर सकता है?

Iron/ लोहा
Calcium/ कैल्शियम
Sulphur/ गंधक
Titanium/ टाइटेनियम

Correct Answer :Iron/ लोहा

What is the name of gas which is present in both natural gas and biogas? / प्राकृतिक गैस और बायोगैस दोनों मे मौजूद गैस का नाम क्या है?

Carbon Dioxide/ कार्बन डाइऑक्साइड
Methane/ मीथेन
Sulphur Dioxide/ सल्फर डाइऑक्साइड
Nitrogen oxide/ नाइट्रोजन ऑक्साइड

Correct Answer :Methane/ मीथेन

Which of the following is likely to cause the average increase in temperature of Earth’s atmosphere in future? / भविष्य में पृथ्वी के वायुमंडल के तापमान में औसत वृद्धि का कारण क्या है?

Atomic warfare/ परमाणु युद्ध
Increasing Ozone layer hole/ ओजोन छिद्र मे विद्तार
Dust clouds from volcanoes/ ज्वालामुखी से धूल के बादलों 
All of the above 

Correct Answer :All of the above 

What is used to dilute oxygen in the gas cylinders used by divers?  गोताखोरों द्वारा प्रयुक्त गैस सिलेंडरों में ऑक्सीजन को तरल करने के लिए क्या प्रयोग किया जाता है?

Hydrogen/ हाइड्रोजन
Methane/ मीथेन
Helium/ हीलियम
Carbon dioxide/ कार्बन डाइऑक्साइड

Correct Answer :Helium/ हीलियम

Formula of Bleaching Powder is :

ब्लीचिंग पाउडर का सूत्र है:





Correct Answer :


Explanation :

Bleaching Powder (Calcium hypochlorite) is a chemical compound with formula Ca(ClO)2. the chemical formula of bleaching powder is CaOCl2 .
Ca(OH)2 + Cl2 → Ca (OCl)Cl + H2O
It is used for water treatment and as a bleaching agents for cotton and linen in the textile industry

A large blood vessel that carries blood away from the heart to other parts of the body is: / एक बडी रक्त वाहिका जो हृदय से शरीर के अन्य भागों को रक्त पहुंचाते है:

A vein / नाड़ी
An artery/ धमनी
A capillary/ केशिका
Nerve/ तंत्रिका

Correct Answer :An artery/ धमनी

Which is the largest white blood cell in human body? / मानव शरीर में सबसे बडा श्वेत रक्त कोशिका कौन सा है?

Erythrocytes/ एरिथ्रोसाइट्स 
Monocytes/ मोनोसाइट
Lymphocyte/ लिम्फोसाइट
Femur/ जाँघ की हड्डी

Correct Answer :Lymphocyte/ लिम्फोसाइट

Deficiency of Iron can cause? / आयरन की अभाव से होता है?

(A) Anemia only/ अरक्तता एनीमिया
(B) Weak Immunity only/ कमजोर प्रतिरक्षा
Neither A nor B/ A और B दोनों नही
Both A and B/ A और B दोनों

Correct Answer :Both A and B/ A और B दोनों

Night blindness is caused due to the deficiency of:/ रतौंधी किस के अभाव से होता है?

Vitamin A1 / विटामिन A1
Vitamin A2/ विटामिन A2
Vitamin A3/ विटामिन A3
Vitamin A/ विटामिन A

Correct Answer :Vitamin A/ विटामिन A

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Which one of the following triples does not represent the sides of a triangle?

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?


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?


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?


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