Related Questions

The oxygen atom is ________ times heavier than the hydrogen atom.
A 2
B 8
C 16
D 32
The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by
A TOD > BOD > COD
B TOD > COD > BOD
C BOD > COD > TOD
D COD > BOD > TOD
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be
A More
B Less
C Same
D Data insufficient; can't be predicted
As an atom absorbs energy, ........ increases and the atom is said to be excited.
A as its energy level
B it is energy level
C the energy level of it
D the energy level
As an atom absorbs energy , ................. increases, and the atom is said to be excited .
A its energy level
B as its energy level
C it is energy level
D the energy level of its
As an atom absorbs energy,_____ increases, and the atom is said to be excitef
A its energy level
B as its energy level
C it is energy level
D the energy level of its
If the size of the nucleus of an atom is compared with a cricket ball, then the radius of the atom is approximately equal to how many kilometres?
A 0.5
B 0.005
C 0.05
D 5
High carbon steel contains more than __________ percent carbon.
A 0.5
B 2.2
C 2.5
D 2.8
Two atoms of hydrogen ___with one atom of oxygen to from a molecule of water . choose the right word for the gap.
A combine
B combined
C consister
D formed
One molecule of oxygen is __________ times heavier than the hydrogen atom.
A 12
B 14
C 16
D 32

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