General Science - in Hindi

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What is the formula of Potash Alum?

पोटाश फिटकिरी का फार्मूला क्या है?




None of these.

Correct Answer :


Explanation :

Potassium alum, potash alum, or potassium aluminium sulfate is a chemical compound: the double sulfate of potassium and aluminium, with chemical formula KAl(SO₄)₂.

It is commonly encountered as the dodecahydrate, KAl(SO₄)₂·12H₂O.

The fresh milk turns sour, what will be its pH , if it was 6 previously?/ताजा दूध के खट्टा होने पर, उसका पीएच क्या होगा, यदि पहले उसका पीएच 6 था ?

Less than 6/ 6 से कम
More than 6/ 6 से अिधक
Neutral (pH=7)/ तटस्थ ( (पीएच = 7)
No change in pH/ पीएच मे कोई परिवर्तन नहीं

Correct Answer :Less than 6/ 6 से कम

Which gas is the supporter of combustion?/ कौन सी गैस ज्वलन का समर्थक करती है?

Carbon dioxide/ कार्बन डाइऑक्साइड 
Chloride/ क्लोराइड
Methane/ मीथेन
None of these/ इनमे से कोई भी नहीं

Correct Answer :Methane/ मीथेन

The mass number of nucleus is:

नाभिक की द्रव्यमान संख्या है:

Always less than its atomic number
उसके आण्विक संख्या से हमेशा कम

The sum of the number of protons and neutrons present in the nucleus
नाभिक मे मौजूद प्रोटान और न्यूट्रान की संख्या

Always more than the atomic weight
उसके आण्विक संख्या से हमेशा अधिक

A fraction
एक अंश

Correct Answer :

The sum of the number of protons and neutrons present in the nucleus

Explanation :

The mass of nucleus of an atom is equal to its atomic mass=No. Of Protons + No. Of Neutrons

The mass of electrons is almost negligible, so the atomic mass doesn't show a major change on addition or removing of mass of electron.

Note:Nucleus of Hydrogen atom consists of just one proton, thus its Mass No. is 1 unit.

In the night vision apparatus which type of waves are used? / रात दृष्टि तंत्र मे किस प्रकार की तरंगों का इस्तेमाल होता है?

Ultraviolet rays/ पराबैंगनी किरणों
Infrared rays/ इन्फ्रारेड किरणों
X‐ rays/ एक्स-रे
Beta rays/ बीटा किरणों

Correct Answer :Infrared rays/ इन्फ्रारेड किरणों

A particle is moving freely. Then its?/ एक कण स्वतंत्र रूप से घूम रहा है। तब उसकी?

Kinetic energy is equal to potential energy./ गतिज ऊर्जा स्थितिज ऊर्जा के समान होती है।
Kinetic energy is less than zero./ गतिज ऊर्जा शून्य से कम होती है।
Kinetic energy is greater than zero./ गतिज ऊर्जा शून्य से अधिक होती है।
Kinetic energy is zero./ गतिज ऊर्जा शून्य होती है।

Correct Answer :Kinetic energy is greater than zero./ गतिज ऊर्जा शून्य से अधिक होती है।

Which are not fat soluble vitamins? / इनमे से कौन सा विटामिन वसा मे घुलनशील नहीं है?

A/ ए
D/ डी
K/ के
B/ बी

Correct Answer :B/ बी

Life span of red blood cells is?/ लाल रक्त कोशिकाओं का जीवनकाल कितना होता है?

90-100 days
100-120 days
70-90 days
120-180 days

Correct Answer :100-120 days

Small pieces of solid matter which are found scattered in the interplanetary space of the solar system are known as: / सौर प्रणाली के अंतर-ग्रहीय में इधर उधर फैले हुए ठोस पदार्थ के छोटे टुकड़े इनमें से किस नाम से जाने जाते हैं:

Asteroids/ क्षुद्रग्रहों
Meteoroids/ उल्कापिंड
Comet/ धूमकेतू
Satellites/ उपग्रह

Correct Answer :Meteoroids/ उल्कापिंड

Water is used to cool the engines of cars, buses, trucks, etc. It is because water has? / पानी का प्रयोग कारों, बसों, ट्रकों के इंजन को ठंडा करने के लिए प्रयोग किया जाता है ऐसा इसलिए किया जाता है क्योंकि पानी का

Low specific heat/ निम्न विशिष्टताप होता है
High specific heat/ उच्च विशिष्ट ताप होता है
Low viscosity/ निम्न श्यानता होती है
High viscosity/ उच्च श्यानता होती है

Correct Answer :High specific heat/ उच्च विशिष्ट ताप होता है

Which instrument is used to measure speed of the vehicle? / वाहन की गति की माप करने के लिए किस उपकरण का प्रयोग किया जाता है?


Correct Answer :Speedometer/स्पीडोमीटर

What is the chemical name of vitamin B1?

विटामिन B1 का रासायनिक नाम क्या है?














Ascorbic acid


एस्कॉर्बिक एसिड

Correct Answer :


Which of the following below are the Alloys of solder? / निम्नलिखित में क्या सोल्डर का मिश्र धातु है?

Tin and lead/ टिन तथा लैड
Iron and nickel/ लौह और निकल
Copper and zinc/ कॉपर और जिंक 
Copper and tin/ कॉपर और टिन

Correct Answer :Tin and lead/ टिन तथा लैड

To manufacture vanaspati from vegetable oil which gas is used?

Carbon dioxide

Correct Answer :Hydrogen

Which is the best food source for sodium?/ सोडियम के लिए सबसे अच्छा भोजन स्रोत क्या है?

Salt/ नमक
Cereals/ अनाज
Pulses/ दलहन
Vegetables/ सब्जियां 

Correct Answer :Salt / नमक

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

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