General Science - in Hindi

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Optical fiber works on the principle of? / ऑप्टिकल फाइबर किस के सिद्धांत के आधार पर काम करती है ?

Refraction of light/ प्रकाश का अपवर्तन
Reflection of light/ प्रकाश का परावर्तन
Total internal reflection of light/ प्रकाश का पूर्ण आंतरिक परावर्तन
Prism / प्रिज्म

Correct Answer :Total internal reflection of light/ प्रकाश का पूर्ण आंतरिक परावर्तन

An apparatus used for charging air with petrol vapours in an internal combustion engine is called?


Correct Answer :Carburettor

Chromosomes contain ____?

Protein only
DNA and protein
DNA, RNA and histone
DNA, RNA, histone and nonhistone proteins

Correct Answer :DNA and protein

The chemical name of “vitamin A” is:/ विटामिन A का रासायनिक नाम है|

Retinol / रेटिनॉल
Riboflavin / राइबोफ्लेविन
Thiamine / थायमिन
Cynocobalamin / सिंकोबलामिन

Correct Answer :Retinol/ रेटिनॉल

Which of the following is known as “nature’s most potent naturally occurring antioxidant?

Vitamin E
Vitamin K
Beta carotene 

Correct Answer :Vitamin E

Which of the following is not a physical property of water? / निम्न में से कौन सा पानी की भौतिक विशेषता नहीं है?

It exists in Liquid, Gas and Solid forms / यह तरल, गैस और ठोस रूपों में मौजूद है
It has colour / इसका रंग होता है
It stick together to drops / यह इकत्रित होकर बहता है
It is odourless / यह गंधरहित होता है

Correct Answer :It has colour / इसका रंग होता है

Light propagate as electromagnetic waves with speed of ___________ m/sec./ लाइट ___________ मीटर / सेकंड की गति के साथ विद्युत चुद्बकीय तरंगों को प्रकाशित करती है|

3.0 X 108
3.0 X 1010
3.0 X 105
3.0 X 101

Correct Answer :3.0 X 108

_____is responsible for rigidity of bones./ यह हड्डियों की मजबुती के लिए____आवश्यक है|

Sodium / सोडियम
Iodine / आयोडीन
Potassium / पोटेशियम
Calcium / कैल्शियम

Correct Answer :Calcium / कैल्शियम

Magnetic compass works on the principle of: / चुंबकीय कंपास किस सिद्धांत पर काम करता है।

Space magnetism / स्थान चुंबकत्व
Earth rotation / पृथ्वी घूर्णन
Earth magnetism / पृथ्वी चुंबकत्व
None of these / इनमें से कोई नहीं

Correct Answer :Earth magnetism / पृथ्वी चुंबकत्व

What is the harm from the depletion of earth's ozone layer?/ पृथ्वी की ओजोन परत की कमी होने से क्या नुकसान है?

The average temperature of earth's surface will increase gradually/ पृथ्वी की सतह के औसत तापमान में धीरे-धीरे वृद्धि
The oxygen content of the atmosphere will decrease / वातावरण में ऑक्सीजन की मात्रा में कमी आ जाएगी
Increased amount of Ultra violet radiation will reach earth's surface / अल्ट्रा वायलेट विकिरण की अधिक मात्रा पृथ्वी की सतह तक पहुंच जाएगी
Sea levels will rise as the polar ice caps will gradually melt / ध्रुवीय बर्फ टोपियां धीरे-धीरे पिघल  जाएगी और इसके कारण समुद् के स्तर में वृद्धि होगी

Correct Answer :Increased amount of Ultra violet radiation will reach earth's surface / अल्ट्रा वायलेट विकिरण की अधिक मात्रा पृथ्वी की सतह तक पहुंच जाएगी

The concentration of which gas is the highest in our environment?

हमारे वातावरण में किस गैस की मात्रा सबसे अधिक है?




Carbon dioxide
कार्बन डाइऑक्साइड

Correct Answer :


Explanation :

The Nitrogen concentration is highest in our environment. It is about 78% ~ of the Earth's atmosphere. The next most abundant gas is Oxygen which constitutes 21% ~. Then 0.9% ~ Argon, and 0.03% ~ Carbon Dioxide and many other gases (neon, helium, methane, krypton and hydrogen, as well as water vapor).

Which device transforms sound energy into electrical energy?/ कौन सा यंत्र ध्वनि ऊर्जा को विद्युत ऊर्जा में परिवर्तित करता है?

Loudspeaker/ ध्वनि विस्तारक यंत्र
Microphone/ माइक्रोफोन
Solar cell/ सौर सेल
Dynamo/ डायनेमो

Correct Answer :Microphone/माइक्रोफोन

RADAR is used for ?/ रडार किस के लिए प्रयोग किया जाता है?

locating submerged submarines/ जलमग्न पनडुब्बी का स्थापन
receiving a signals in a radio receiver/ रेडियो रिसीवर में संकेत प्राप्त करना
locating geostationary satellites/ भूस्थिर उपग्रहों का स्थापन
detecting and locating the position of objects such as aeroplanes/ हवाई जहाज जैसे वस्तुओं को खोजना और स्थापन

Correct Answer :detecting and locating the position of objects such as aeroplanes/ हवाई जहाज जैसे वस्तुओं को खोजना और स्थापन

In which of the following Container radioactive materials should be stored ?/रेडियोधर्मिता सामग्री को निम्न में किस आधान में संग्रह करना चाहिए ?

Lead/ सीसा
Sodium/ सोडियम
Titanium/ टाइटेनियम
Copper/ ताबां

Correct Answer :Lead/सीसा

Which element forms the highest number of compounds in the periodic table?/ आवर्त सारणी में कौन सा तत्व उच्चतम यौगिक की संख्या बनाता है?

Silicon/ सिलिकॉन
Carbon/ कार्बन 
Oxygen/ ऑक्सीजन 
Phosphorous/ फॉस्फोरस

Correct Answer :Carbon/ कार्बन

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