Objective General Knowledge

Q. Which of the following has the same atomic number and atomic weight?
1 hydrogen
2 helium
3 oxygen
4 nitrogen
Ans: 1

Q. Which of the following has a pH less than 7?
1 blood
2 tears
3 pure water
4 saliva
Ans: 4

Q. Which of the following gases is used in the cigarette lighters?
1 butane
2 methane
3 propane
4 radon
Ans: 1

Q. which of the following gases is the most toxic?
1 Carbon dioxide
2 Carbon monoxide
3 Sulphur dioxide
4 Acetic acid
Ans: 2

Q. Which of the following elements is found in all organic compounds?
1 Calcium
2 Carbon
3 Nitrogen
4 Oxygen
Ans: 2

Q. Which of the following elements behave chemically.both as a metal and a non metal?
1 argon
2 carbon
3 xenon
4 boron
Ans: 4

Q. What is the chemical name of bleaching Powder?
1 Calcium Carbonate
2 Calcium hydrochloride
3 calcium phosphate
4 Calcium cynamide
Ans: 2

Q. What is commonly called limestone is
1 CaO
2 CaC2
3 CaSO4
4 CaCO3
Ans: 4

Q. Until the nineteenth Century, aluminium was almost as expensive as gold. The invention of an inexpensive way to extract this metal by a 22-year-old American made this metal inexpensive subsequently. The inventor was
1 Goldschmidt
2 Mond
3 Charles-Martin Hall
4 Parkes
Ans: 3

Q. The two elements that exist as liquids at 25°C are
1 mercury and lithium
2 mercury and Caesium
3 bromine and mercury
4 mercury and argon
Ans: 3