Related Questions

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
One molecule of oxygen consists of __________ atoms of oxygen.
A 2
B 4
C 8
D 16
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
Identify the sentence in which the word element (s) refers to 'suitable or favourable environment. (1) There is an element of truth in your story. (2) Water is composed of elements of hydrogen and oxygen. (3) I feel out of my elements in political discussions. (4) Water is a natural element for fish
A (4)
B (3)
C (1) and (2)
D (1)
In ice, the number of hydrogen bonds per water molecule is
A 1
B 2
C 4
D 8
Solution X contains 40% salt and 60% water by weights, Solution Y contains 25% salt and 75% water. If a mixture of X and Y contains 30% salt. What percent of the weight of this mixture is solution X?
A 10%
B 33.3%
C 40%
D 42.5%
A sink contains exactly 12 liters of water. If water is drained from the sink until it holds exactly 6 liters of water less than the quantity of water drained away, how many liters of water were drained away ?
A 2
B 3
C 9
D 6
As compared to fresh river water, sea water contains oxygen
A 10% less
B 20% less
C 10% more
D 20% more
Number of hydrogen atoms in a Glucose molecule is
A 6
B 8
C 12
D 14

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