PSC GK questions and answers : Physics & Chemistry

GK questions and answers : Physics & Chemistry

These are important GK objective type questions and answers for all competitive exams like PSC, Bank PO, SSC CGL, CDS, UPSC exams and all state-related exam. Practice with this huge collection of Basic General Knowledge Questions and Answers.

1. What is used in fire works for red flame?
A) Barium
B) Calcium
C) Zirconium
D) Strontium
Ans : D) Strontium

2. What is Known as 'little silver'?
A) Mercury
B) Platinum
C) Uranium
D) Gold
Ans : B) Platinum

3. The first element to have its radio active properties recognized and investigated:
A) Polonium
B) Uranium
C) Plutonium
D) Thorium
Ans : A) Polonium

4. The main constituent of bone:
A) Calcium carbonate
B) Calcium phosphate
C) Calcium silicate
D) Sodium chloride
Ans : B) Calcium phosphate

5. The best non-metallic conductor of electricity:
A) Silicon
B) Graphite
C) Germanium
D) Boron
Ans : B) Graphite

6. Which element has the second highest density?
A) Iridium
B) Rhenium
C) Gold
D) Tungsten
Ans : A) Iridium

7.The most common element on the earth's crust by mass:
A) Aluminium
B) Silicon
C) Iron
D) Oxygen
Ans : D) Oxygen

8. Which is not an ingredient of sugar?
A) Carbon
B) Nitrogen
C) Hydrogen
D) Oxygen
Ans : B) Nitrogen

9. Sweetest natural sugar:
A) Sucrose
B) Galactose
C) Fructose
D) Glucose
Ans : C) Fructose

10. Which is used as a catalyst in hydrogenation ?
A) Cobalt
B) Iron
C) Silver
D) Nickel
Ans : D) Nickel

11. The most abundant inert gas in the atmosphere:
A) Radon
B) Argon
C) Krypton
D) Xenon
Ans : B) Argon

12. Itai-Itai disease is caused by:
A) Strontium
B) Arsenic
C) Cadmium
D) Mercury
Ans : C) Cadmium

13. Phenol is also known as:
A) Carbonic acid
B) Carbolic acid
C) Ethanoic acid
D) Sulphuric acid
Ans : B) Carbolic acid

14. The metal that has the second highest electrical and thermal conductivity:
A) Platinum
B) Bismuth
C) Silver
D) Copper
Ans : D) Copper

15. Main elements in Petrol:
A) Carbon,Hydrogen
B) Carbon,Nitrogen
C) Hydrogen and Oxygen
D) None of these
Ans : A) Carbon,Hydrogen

16. Which body system is affected by the lead emitted through the smoke of automobiles:
A) Reproductive system
B) Nervous system
C) Digestive system
D) Endocrine system
Ans : B) Nervous system

17. A suspension of fine solid particles or liquid droplets in a gas:
A) Aerosol
B) Froth
C) Gel
D) Emulsion
Ans : A) Aerosol

18. The acid contained in gastric juice:
A) Prussic acid
B) Hydrochloric acid
C) Ascorbic acid
D) Tartaric acid
Ans : B) Hydrochloric acid

19. The most abundant gas in the atmosphere of Venus:
A) CO2
B) Methane
C) Hydrogen
D) Oxygen
Ans : A) CO2

20. Which gas is examined in pollution testing centers of vehicles:
A) Nitrogen
B) Radon
C) Carbon Monoside
D) Krypton
Ans : C) Carbon Monoside

21. The name 'Argentum' is related to the metal:
A) Aluminium
B) Silver
C) Lithium
D) Gallium
Ans : B) Silver

22. Which is a mixture of nitrogen and carbon monoxide ?
A) Producer gas
B) Coal gas
C) Acetylene
D) Ozone
Ans : A) Producer gas

23. The solid carbon dioxide is known as:
A) Litharge
B) Alum
C) Dry Ice
D) Verdigris
Ans : C) Dry Ice

24. The acid present in soaps:
A) Stearic acid
B) Lactic acid
C) Prussic acid
D) Hydrochloric acid
Ans : A) Stearic acid

25. The most abundant alkali metal:
A) Calsium
B) Sodium
C) Iron
D) Rubidium
Ans : B) Sodium

26. The lightest noble gas in the universe:
A) Argon
B) Xenon
C) Radon
D) Helium
Ans : D) Helium

27. Gas used in fire extinguishers:
A) Carbon monoxide
B) Carbon dioxide
C) Nitrogen
D) Helium
Ans : B) Carbon dioxide

28. The gas formed when today became sour:
A) CO2
B) Methane
C) Nitrogen
D) Ammonia
Ans : A) CO2

29. What percent of the aquaregia is hydrolic acid ?
A) 66.6
B) 80
C) 75
D) 50
Ans : C) 75

30. Which of the following metals that are stored in kerosene ?
A) Potassium
B) Copper
C) Aluminium
D) Ainc
Ans : A) Potassium

31. The most widely using industrial acid:
A) Acetic acid
B) Hydrochloric acid
C) Nitric acid
D) Sulphuric acid
Ans : D) Sulphuric acid

32. Which of the following is the most poisonous inert acid:
A) Nitric acid
B) Hydrocyanic acid
C) Acetic acid
D) Citric acid
Ans : B) Hydrocyanic acid

33. Minamata disease was caused by:
A) Lead
B) Mercury
C) Arsenic
D) Cadmium
Ans : B) Mercury

34. The formation of carboxy-haemoglobin in blood will .............its capacity to hold oxygen:
A) Increase
B) Decrease
C) Not affect
D) None of these
Ans : B) Decrease

35. Which metal is produced through cyanide process ?
A) Copper
B) Silver
C) Gold
D) Aluminium
Ans: C) Gold

36. The country where three mile Island disaster occurred in 1979:
A) US
B) Japan
C) Ukraine
D) China
Ans : A) US

37. Which acid becomes fumes in air ?
A) Nitric acid
B) Formic acid
C) Tannic acid
D) Citric acid
Ans : A) Nitric acid

38. The major constituent of natural gas:
A) Methane
B) Butane
C) Propane
D) Pentane
Ans : A) Methane

39. The oxidation state of inert gases :
A) 1
B) 2
C) 3
D) 0
Ans : D) 0

40. Polyxene is ore of :
A) Silver
B) Platinum
C) Gold
D) Aluminium
Ans : B) Platinum

Newton's Law of motion

Newton's laws of motion help us to understand how objectives behave when they are standing still,when they are moving,and when forces act upon them.There are Three laws of motion.

Newton's First law of motion :

Newton's first law of motion states that an object in motion tends to stay in motion unless an external force acts upon it.

Similarly, if the object is at rest,it will remain at rest unless an unbalanced force acts upon it.Newton's first law of motion is also known as the law of inertia.