General Science

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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?

A)

Anemometer


B)

Voltmeter


C)

Ammeter


D)

Resistor



Correct Answer :

Anemometer


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 :

A)
CaOCl2

B)
CaCO3

C)
CaKOH

D)
Ca2Al(OH)4


Correct Answer :

CaOCl2


Explanation :

Bleaching Powder (Calcium hypochlorite) is a chemical compound with formula Ca(ClO)2. the chemical formula of bleaching powder is CaOCl2 .
Preparation
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

The Fungal Disease “Red Rot” affects which plant? / फफूंद रोग ''रेड रोट'' कौन से पौधे मे होता है?

Groundnut/ मूंगफ़ली
Sugarcane/ गन्ना
Coffee/ कॉफी
Potato/ आलू


Correct Answer :Sugarcane/ गन्ना

The different colours of different stars are due to the variation of? / विभिन्न तारों के अलग अलग रंग की भिन्नता के कारण हैं?

Pressure/ दबाव
Temperature/ तापमान
Pressure and temperature/ दबाव और तापमान
Surface reactions/ सतह प्रतिक्रिया


Correct Answer :Temperature/तापमान

What is the name of alcohol obtained in the saponification process? / सैपोनीफिकेशन प्रक्रिया में कौन सा अल्कोहल प्राप्त किया जाता है:

Easter/ ईस्टर
Glycerol/ ग्लिसरॉल 
Acetone/ एसीटोन
Mortar/ मोर्टार 


Correct Answer :Glycerol/ ग्लिसरॉल 

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Pipes and Cistern

Two pipes A and B can fill a tank in 6 hours and 4 hours respectively. If they are opened on alternate hours and if pipe A s opened first, in how many hours, the tank shall be full?

A large tanker can be filled by two pipes A and B in 60 min and 40 min respectively. How many minutes will it take to fill the tanker from empty state if B is used for first half of the time, and A and B fill it together for the other half?

A tank is filled by 3 pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The 2nd pipe fills the tank 5 hours faster than first pipe and 4 hours slower than third pipe. The time required by first pipe is?

Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern separately?

Two pipes A and B can fill a tank in 24 min and 32 min respectively. If both the pipes are opened simultaneously, after how much time B should be closed so that the tank is full in 18 min?

Two pipes A and B can fill a tank in 36 min and 45 min respectively. A water pipe C can empty the tank in 30 min. First A and B are opened. after 7 min, C is also opened. In how much time, the tank is full?

Two pipes can fill a cistern in 14 hours and 16 hours respectively. The pipes are opened simultaneously and it is found that due to leakage in the bottom it took 32 min more to fill the cistern. When the cistern is full, in what time will the leak empty it?

Bucket P has thrice the capacity as Bucket Q. It takes 60 turns for Bucket P to fill the empty drum. How many turns it will take for both the buckets P and Q, having each turn together to fill the empty drum?

Probability

In a class , 30 % of the students offered English, 20 % offered Hindi and 10 % offered Both.If a student is offered at random, what is the probability that he has offered English or Hindi?

In a lottery ,there are 10 prizes and 25 blanks.A lottery is drawn at random. what is the probability of getting a prize ?

Two dice are thrown simultaneously .what is the probability of getting two numbers whose product is even?

Two diced are tossed the probability that the total score is a prime number?

Two cards are drawn at random from a pack of 52 cards What is the probability that either both are black or both are queens?

Two dice are thrown together .What is the probability that the sum of the number on the two faces is divisible by 4 or 6?

A bag contains 6 white and 4 black balls .Two balls are drawn at random .Find the probability that they are of the same colour?

In a simultaneous throw of a pair of dice,find the probability of getting a total more than 7?

An unbiased die is tossed.Find the probability of getting a multiple of 3?

Problems on Ages

My brother is 3 years elder to me. My father was 28 years of age when my sister was born while my mother was 26 years of age when i was born. If my sister was 4 years of age when my brother was born,then what was the age my father and mother respectively when my brother was born?

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