(A) hydrogen
(B) hydrogen and helium
(C) hydrogen and oxygen
(D) hydrogen and nitrogen
The answer is: (B) hydrogen and helium
Category: Everyday Science
The average human body contains about ________ gram of Sodium Chloride.
(A) 190
(B) 210
(C) 230
(D) 250
The answer is: (D) 250
The refrigerator works on the two processes
(A) condensation and convection
(B) convection and radiation
(C) radiation and evaporation
(D) condensation and evaporation
The answer is: (D) condensation and evaporation
Vitamin ________ is also called ascorbic acid.
(A) D
(B) A
(C) E
(D) C
The answer is: (D) C
One atomic mass unit (amu) is a mass unit equal to exactly one-twelth the mass of a ________ atom.
(A) carbon-8
(B) carbon-12
(C) carbon-16
(D) carbon-20
The answer is: (B) carbon-12
Evaporation is a ________ process.
(A) condensation
(B) Liquefying
(C) cooling
(D) convection
The answer is: (C) cooling
A ________ consists of the elements in any one horizontal row of the periodic table.
(A) block
(B) base
(C) group
(D) period
The answer is: (D) period
At high altitude the air temperature is lower as compare to sea level, therefore water boils at ________ temperature.
(A) lower
(B) higher
(C) constant
(D) absolute
The answer is: (A) lower
An electrolyte is a substance that produces ________ solution when dissolved in water.
(A) conducting
(B) nonconducting
(C) poorly conducting
(D) B and C
The answer is: (A) conducting
The melting point of ice is lowered by a/an ________ in pressure.
(A) increase
(B) decrease
(C) change
(D) consistency
The answer is: (A) increase