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Some preferred Science Books
Science Encyclopedia: First reference for young readers and writers
Science: The Definitive Visual Guide
Callister's Materials Science and Engineering
Ugc- Csir Jrf/Net: Life Sciences
Objective General Science Useful for IAS,PCS,SSc,NDA,CDS,SI,Railway,Armed Forces etc.
Science questions
Question:
मानव शरीर से संबंधित संख्यात्मक तथ्य
by:
Alok (Profile)
Ans:
1. वस्यक व्यक्तियों में अस्थियों की संख्या : → 206
2. खोपड़ी में अस्थियां : → 28
3. कशेरुकाओ की संख्या: →33
4. पसलियों की संख्या: →24
5. गर्दन में कशेरुकाएं : →7
6. श्वसन गति : →16 बार प्रति मिनिट
7. हृदय गति : →72 बार प्रति मिनिट
8. दंत सूत्र : → 2:1:2:3
9. रक्तदाव : →120/80
10. शरीर का तापमान : → 37 डीग्री 98.4 फ़ारेनहाइट
11. लाल रक्त कणिकाओं की आयु : → 120 दिन
12. श्वेत रक्त कणिकाओ की आयु : →1 से 3 दिन
13. चेहरे की अस्थियां: → 14
.....Read more...
Question:
फल/फुल/सब्जी आदि का वैज्ञानिक नाम
by:
Alok (Profile)
Ans:
1.मनुष्य---होमो सैपियंस
2.मेढक---राना टिग्रिना
3.बिल्ली---फेलिस डोमेस्टिका
4.कुत्ता---कैनिस फैमिलियर्स
5.गाय---बॉस इंडिकस
6.भैँस---बुबालस बुबालिस
7.बैल---बॉस प्रिमिजिनियस टारस
8.बकरी---केप्टा हिटमस
9.भेँड़---ओवीज अराइज
10.सुअर---सुसस्फ्रोका डोमेस्टिका
11.शेर---पैँथरा लियो
12.बाघ---पैँथरा टाइग्रिस
13.चीता---पैँथरा पार्डुस
14.भालू---उर्सुस मैटिटिमस कार्नीवेरा
15.खरगोश---ऑरिक्टोलेगस कुनिकुलस
16.हिरण---सर्वस एलाफस
17.ऊँट-
.....Read more...
Question:
सामान्य विज्ञान : अतिमहत्त्वपूर्ण प्रश्नोत्तरी
by:
Alok (Profile)
Ans:
(1) लाफिंग गैस का रासायनिक नाम क्या हैं ?
उत्तर - नाइट्रस ऑक्साइड (खोजकर्ता-प्रीस्टाले)
(2) गोबर गैस में मुख्यत: कौन-सी गैस होती है ?
उत्तर- मिथेन
(3) कुकिंग गैस में कौन-सी गैस होती हैं ?
उत्तर- प्रोपेन, ब्यूटेन
(4) चमकने वाला और माचिसों में प्रयुक्त होने वाला पदार्थ है-
उत्तर- फास्फॉरस
(5) फलों को पकाने के लिए किस गैस का प्रयोग किया जाता हैं ?
उत्तर- ऐसीटिलीन
(6) जीवाश्मों की आयु निर्धारित करने के लिए कौन-सी विधि अपनाई जाती है?
.....Read more...
Question:
pH मान [ pH value ]
by:
Alok (Profile)
Ans:
१.जल का pH मान कितना होता है = *7*
2 . दूध का PH मान कितना होता है = *6.4*
3.सिरके का PH कितना होता है = *3*
4.मानव रक्त का pH मान = *7.4*
5. नीबू के रस का pH मान = *2.4*
6 . NaCl का pH मान = *7*
7. pH पैमाने का पता किसने लगाया = *सारेन्सन ने*
8. pH मूल्यांक क्या दर्शाता = *किसी घोल का अम्लीय या क्षारीय होना*
9. अम्लीय घोल का pH मान कितना होता है = *7 से कम*
10. उदासिन घोल का pH मान = *7*
11. शराब का pH मान = *2.8*
12. किसी व्यक्ति के रक्त क
.....Read more...
Question:
SCIENCE GK
by:
Alok (Profile)
Ans:
1. लाफिंग गैस का रासायनिक नाम क्या हैं?— *नाइट्रस ऑक्साइड*
2. हवा से हल्की गैस का उदाहरण दें?— *हाइड्रोजन*
3. हवा से भारी गैस का नाम बताएं?— *कार्बन डाइऑक्साइड*
4. गोबर गैस में मुख्यत: कौन-सी गैस होती है?— *मिथेन*
5. कुकिंग गैस में कौन-सी गैस होती हैं?— *प्रोपेन, ब्यूटेन*
6. चमकने वाला और माचिसों में प्रयुक्त होने वाला पदार्थ है-— *फास्फॉरस*
7. मनुष्य के बाद सबसे समझदार जीव किसे कहा जाता हैं?— *डालिफन*
8. बाँस ( Bamboo) क्या हैं?— *घास*
9. फलों को पकाने के
.....Read more...
Question:
Days and nights are caused because of ?
by:
Jyoti (Profile)
A:
shape of Earth's orbit
Not Answered
B:
revolution movement
C:
rotational movement
D:
None of these.
Question:
What kind of mirror is used for rear view ?
by:
amsh (Profile)
A:
Concave
Not Answered
B:
Convex
C:
Plane
D:
Simple Glass
Question:
If the mass of a solid is doubled, its density ?
(A) becomes two times
(B) becomes half
(C) remains unchanged
(D) becomes four times
by:
vipul (Profile)
Answer not given by asker,
you can submit your answer here.
Click the question
Question:
The shape of our Galaxy Milky way is ?
by:
Abhishek (Profile)
Answer not given by asker,
you can submit your answer here.
Click the question
Question:
Which of the following minerals does not contain oxygen ?
by:
Arun91 (Profile)
A:
Carbonates
Not Answered
B:
Silicates
C:
Pyrites
D:
None of these
Question:
The longest cell in human body is ?
by:
sonal (Profile)
A:
Skeletal cells
Not Answered
B:
RBC
C:
Neurons (Nerve Cells)
Question:
Which countries has launched Amos-3 satellite ?
by:
Arun91 (Profile)
A:
Japan
Not Answered
B:
Israel
C:
India
D:
None of these
Question:
Reading of a barometer going down is an indication of
by:
mackharsh (Profile)
A:
snow
Not Answered
B:
storm
C:
intense heat
D:
rainfall
Question:
What is the unit for measuring the amplitude of a sound?
by:
mackharsh (Profile)
A:
Decibel
Not Answered
B:
Coulomb
C:
Hum
D:
Cycles
Question:
Brass gets discoloured in air because of the presence of which of the following gases in air ?
by:
mackharsh (Profile)
A:
Oxygen
Not Answered
B:
Hydrogen sulphide
C:
Carbon dioxide
D:
Nitrogen
Question:
Who invented Gramophone ?
by:
Rohit65 (Profile)
A:
Michael Faraday
Not Answered
B:
Thomas Alva Edison
C:
Sir Alexander Graham Bell
D:
None of these.
Question:
Steam boat was invented by ?
by:
Rohit65 (Profile)
A:
Michael Faraday
Not Answered
B:
James Watt
C:
Thomas Edison
D:
None of these.
Question:
A magnetic compass is generally used
by:
yashovardhan7777 (Profile)
A:
To draw a circle
Not Answered
B:
To make another magnets
C:
To find Dierections
D:
To attaract iron
Question:
Who identified the role of mosquitoes in spreading yellow fever?
by:
Alok (Profile)
A:
Jesse William Lazear
Not Answered
B:
William C. Gorgas
C:
Aristides Agramonte
D:
Carlos Finlay
Question:
Which of the following is not a necessary part of our food?
by:
amsh (Profile)
A:
Fats
Not Answered
B:
Vitamins
C:
Proteins
D:
None of these.
Question:
Capillary action is due to?
by:
amsh (Profile)
A:
Cohesion & Gravity
Not Answered
B:
Adhesion & Surface tension
C:
Gravity Only
D:
Surface tension only
Question:
Heat-resistant glass is ?
by:
amsh (Profile)
A:
Flient Glass
Not Answered
B:
Hard Glass
C:
Pyrex Glass
D:
None of these.
Question:
Atmospheric pressure is measured by?
by:
amsh (Profile)
A:
Chronmeter
Not Answered
B:
Barometer
C:
Thermometer
D:
None of these
Question:
Glass is made of ?
by:
amsh (Profile)
A:
Sand and salt
Not Answered
B:
Sand and silicates
C:
Quartz and mica
Question:
Aqua-phobia, also referred as hydrophobia, is the fear of ?
by:
Jyoti (Profile)
A:
Water
Not Answered
B:
Height
C:
Darkness
D:
None of these.
Question:
scientific name of mango tree.
by:
maruti93 (Profile)
A:
Mangifera indica
Not Answered
B:
Mango tree
C:
None
Question:
Babcock and Wilcox Boiler is..
by:
maruti93 (Profile)
A:
Watet Tube
Not Answered
B:
Fire Tube
C:
both of these
D:
none
Question:
India's BVRAAM (beyond visual range air-to-air missile) is?
by:
Alok (Profile)
A:
Molniya R-60
Not Answered
B:
Astra Missile
C:
Raytheon
D:
MBDA AIM-132 ASRAAM
Question:
Which fabric was widespread used around 3000 BC in india?
by:
yashu (Profile)
Ans:
Cotton
Question:
Winnowing is used to seperate the grain from the?
by:
yashu (Profile)
A:
Stalk
Not Answered
B:
Chaff
C:
Sediment
D:
Solvent
Question:
Grains or seeds are separated from the stalk by ?
by:
yashu (Profile)
A:
Hand-picking
Not Answered
B:
Winnowing
C:
Siewing
D:
Threshing
Question:
Types of lasers?
by:
EGPAGE (Profile)
A:
Gas
Not Answered
B:
Solid state
C:
Diode
D:
All of these.
Question:
Louis Pasteur invented the.........
by:
yashu (Profile)
A:
Vaccine for chicken pox
Not Answered
B:
Rabies vaccine
C:
Malaria vaccine
D:
Non of these
Question:
The study of all kinds of plants life is called?
by:
yashu (Profile)
A:
Zoology
Not Answered
B:
Botany
C:
Chemistry
D:
None of these.
Question:
Laughing Gas is .....
by:
anand (Profile)
A:
Nitrogen Tri-oxide
Not Answered
B:
Nitrogen Penta-oxide
C:
Nitric Oxide
D:
Nitrous oxide
Question:
Who was the first woman in space?
by:
Alok (Profile)
A:
Valentina Tereshkova
Not Answered
B:
Sally Ride
C:
Liu Yang
D:
Svetlana Savitskaya
Question:
Which is the smallest book in the world
by:
yashu (Profile)
A:
Bible
Not Answered
B:
Shiki no Kusabana
C:
Béla Varga
D:
Gábor Varga
Question:
Who was the first person in space
by:
yashu (Profile)
A:
Rakesh Sharma
Not Answered
B:
Ritesh Kumar
C:
Aryabhatt
D:
Major Yuri Gagarin
Question:
The length of the wing of an air plane is 10 m. Its horizontal velocity is 200 m /s. If the vertical component of the earth’s magnetic field is 5.0 × 10 - 5 weber /m2, calculate the potential difference developed across the two ends of the wing.
by:
scorpio (Profile)
A:
1 mV
Not Answered
B:
1 V
C:
0.1n V
D:
0.1 V
Question:
The two rails of railway track, insulated from each other, and the ground are connected to a milli-voltmeter. What will be the reading of the milli-voltmeter when a train travels at a speed of 180 km /hr along the track, if the vertical component of earth’s magnetic field is 2 × 10 - 4 weber /m2 and rails are separated by 1 m.
by:
scorpio (Profile)
A:
10 mV
Not Answered
B:
1 V
C:
1 mV
D:
100 V
Question:
A direct current of 2 A in a coil of 400 turns causes a flux of 10 - 4 weber to links of the coil. Compute the average counter e.m.f. induced in the coil if the current is interrupted in 0.08 s. Find the inductance of the coil.
by:
scorpio (Profile)
A:
5 V, 0.02 H
Not Answered
B:
0.5 V, 0.02 H
C:
0.02 V, 0.5 H
D:
0.2 V, 0.05 H
Question:
The rate of change of current in one of the coils ( a system formed by two coils ) is 1.6 A /s. Due to this, induced emf in the other coil is 25.6 ´ 10 3 mV. Find mutual inductance of the system formed by coils.
by:
scorpio (Profile)
A:
16 x10 ^-3 H
Not Answered
B:
16 0 H
C:
16 H
D:
1.6 x10 ^-3 H
Question:
Which of these things would a cardiovascular technologist not do?
by:
EGPAGE (Profile)
A:
Assist a surgeon in implanting a pacemaker
Not Answered
B:
Design an artificial heart
C:
Monitor a patients heart rate during surgery
D:
Assist with open heart surgery
Question:
In which science career might you monitor gauges and sensors to decide when to release steam from geothermal power plant valves?
by:
EGPAGE (Profile)
A:
Geologist
Not Answered
B:
Precision instrument and equipment repairer
C:
Power plant operator
D:
None of these.
Question:
What kind of scientist might develop an acne medication that kills pimple-causing bacteria?
by:
EGPAGE (Profile)
A:
Microbiologist
Not Answered
B:
Acneologist
C:
Minibiologist
D:
Neurologist
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