General Science Archives - Page 18 of 20

A hydroelectric power generator works on which of the following scientific principles?

A hydroelectric power generator works on which of the following scientific principles? जलविद्युत शक्ति जनित्र, निम्नलिखित में से वैज्ञानिक सिद्धांत पर कार्य करता हैं?

A hydroelectric power generator works on which of the following scientific principles? Read More »

An object is placed at 80 cm on the left of a convex

An object is placed at 80 cm on the left of a convex lens of focal length 40 cm. Where should a screen be placed to right of the lens so that the image formed is real, inverted and same sized? एक वस्तु को 40 cm फोकस दुरी वाले एक उत्तल लेंस के बाई ओर

An object is placed at 80 cm on the left of a convex Read More »

The persistence of sound even after the source has stopped emitting it, due to ________ from many surfaces, is called reverberation.

The persistence of sound even after the source has stopped emitting it, due to ________ from many surfaces, is called reverberation. कई पृष्टों से ________ के कारण स्त्रोत द्वारा ध्वनि उत्सर्जित बंद कर देने के बाद भी ध्वनि का बने रहना, प्रतिध्वनन कहलाता हैं।

The persistence of sound even after the source has stopped emitting it, due to ________ from many surfaces, is called reverberation. Read More »

When iron filings are mixed with sulfur powder

When iron filings are mixed with sulfur powder and the mixture is heated, a black substance called iron sulfide is formed. Which statement best describes the changes involved? जब लोहे के बुरादे को सल्फर पाउडर के साथ मिलाया जाता है और मिश्रण को गर्म किया जाता है, तो आयरन सल्फाइड नामक एक काला पदार्थ बनता

When iron filings are mixed with sulfur powder Read More »

During the water cycle, which part of the plant is involved in the process of transpiration?

During the water cycle, which part of the plant is involved in the process of transpiration? जल चक्र के दौरान, पादपों का कौन सा भाग वाष्पोत्सर्जन की प्रक्रिया में भाग लेता हैं?

During the water cycle, which part of the plant is involved in the process of transpiration? Read More »

The kinetic energy of an object of mass

The kinetic energy of an object of mass m moving with a velocity v is 25 J. What will be its kinetic energy when its velocity is increased three times (3v)? वेग v से गतिमान m द्रव्यमान की किसी वस्तु की गतिज ऊर्जा 25 J है। जब इसका वेग बढ़ाकर तीन गुना (3v) कर दिया

The kinetic energy of an object of mass Read More »

What is the SI unit of energy?

What is the SI unit of energy? ऊर्जा का एस. आई. (SI) मात्रक निम्नलिखित में से कौन सा है?

What is the SI unit of energy? Read More »

The molecular mass of a compound is 63 u

The molecular mass of a compound is 63 u. If it contains one hydrogen atom and three oxygen atoms, the atomic mass of the remaining element is : किसी यौगिक का आणविक द्रव्यमान 63 u है। यदि इसमें एक हाइड्रोजन परमाणु और तीन ऑक्सीजन परमाणु हैं, तो शेष तत्व का परमाणु द्रव्यमान __________है।

The molecular mass of a compound is 63 u Read More »

Bacteria that perform anoxygenic photosynthesis use which of the following compounds as an electron donor?

Bacteria that perform anoxygenic photosynthesis use which of the following compounds as an electron donor? ऑक्सीजन रहित (anoxygenic) प्रकाश संश्लेषण करने वाले बैक्टीरिया इलेक्ट्रॉन दाता के रूप में निम्नलिखित में से किस यौगिक का उपयोग करते हैं?

Bacteria that perform anoxygenic photosynthesis use which of the following compounds as an electron donor? Read More »

Galvanisation protects iron from

Galvanisation protects iron from rusting by coating it with a thin layer of: यशदलेपन लोहे पर ____________ की पतली परत चढ़ाकर उसको जंग से सुरक्षित करता है।

Galvanisation protects iron from Read More »

General Science

Stay Updated!