This test contains MCQs from Physics, Chemistry, and Biology. General science is an important part of general awareness included in the syllabus of most competitive exams including RRBs, DSSSB, UPSSSC, UPSC, etc.
There is a total of 15 questions: 5 from physics, 5 from chemistry, and 5 from biology.
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- Violet
- Blue
- Red
- yellow
Explanation: the longest wavelength is Red, and the shortest is violet.
- Copper
- Tungesten
- Nichrome
- Iron
Explanation: Nichrome 80/20 is an ideal material, because it has relatively high resistance and forms an adherent layer of chromium oxide when it is heated for the first time.
- Coaltar
- Water
- Glycerine
- Alcohol
- 00
- -400
- 1000
- -800
- Water
- Steel
- Alcohol
- Air
Explanation: Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.
- Oxidising Agent
- Catalytic agent
- Neutral oxide
- Reducing agent
Explanation: Carbon monoxide is a colorless, odorless, and tasteless flammable gas that is slightly less dense than air.
- Alcohol
- Water
- glycerine
- ether
Explanation: White phosphorus is highly reactive, and spontaneously ignites at about 30°C in moist air. It is usually stored under water, to prevent exposure to the air. It is also extremely toxic, even in very small quantities.
- O
- Al
- Si
- N
Explanation: Oxygen is the most abundant element in the Earth's crust, making up 46.6% of Earth's mass. Silicon is the second most abundant element (27.7%), followed by aluminum (8.1%), iron (5.0%), calcium (3.6%), sodium (2.8%), potassium (2.6%). and magnesium (2.1%)
- Nitrobenzene
- T.N.T.
- Methyl chloride
- Nitroglycerine
Explanation: Dynamite is an explosive made of nitroglycerin, sorbents and stabilizers. It was invented by the Swedish chemist and engineer Alfred Nobel in Geesthacht and patented in 1867. It rapidly gained wide-scale use as a more powerful alternative to black powder
- Bees Wax
- Spermaceti wax
- Lanodin wax
- Paraffin wax
- Uracil
- Adenine
- Thymin
- Cytosine
- Skin
- Eyes
- Lungs
- Ear
- Vistula
- Femur
- Fibula
- Humerous
- Ptyalin
- Pepsin
- Maltose
- Lipase
Explanation: Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine. About 30% starch digestion takes place in the mouth cavity.
- F.Banting
- Edward Jenner
- Ronald Ross
- S.A wakesman
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