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general science aptitude test | Science MCQ Quiz with Explained Answers

✍️ Prakash Joshi 📅 October 22, 201935,766 views 📝 Attempts: 874 📥 Download PDF
          

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.

 
        
Score: 0 / 15

Questions

Q1. In the visible spectrum the color having the shortest wavelength is :
the longest wavelength is Red, and the shortest is violet.
Q2. The Heater Element in an electric iron is made of__
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.
Q3. Which of following is the most viscous medium?
Q4. At which temperature do the reading of the centigrade and the fahrenheit scales coincide?
Q5. Sound travels fastest in :
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.
Q6. Which of the following is the property of Carbon Monoxide:
Carbon monoxide is a colorless, odorless, and tasteless flammable gas that is slightly less dense than air.
Q7. White phosphorous is generally kept under-
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.
Q8. The most abundant element in the earth's crust is:
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%)
Q9. The most important organic constituent of dynamite is :
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
Q10. Which of the following is used in the manufacturing of candle?
Q11. DNA differs from RNA in having :
Q12. Trachoma is disease of the :
Q13. What is the name of the longest bone of thigh?
Q14. The Enzyme found in the salive is :
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.
Q15. Who discovered insulin?

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