[D] (i), (iii) and (iv) In this reaction X and Y cannot be broken down into simpler substances by chemical reactions, so X and Y are elements. A compound is a substance composed of two or more elements that are chemically combined in a fixed ratio by mass, so P is a compound with a definite compositRead more
[D] (i), (iii) and (iv)
In this reaction X and Y cannot be broken down into simpler substances by chemical reactions, so X and Y are elements. A compound is a substance composed of two or more elements that are chemically combined in a fixed ratio by mass, so P is a compound with a definite composition.
Which of the following are not ionic compounds?
[B] (ii) and (iii) HCL and CCL₄ are not ionic compounds because they are formed by sharing of electrons. These are covalent compounds.
[B] (ii) and (iii)
See lessHCL and CCL₄ are not ionic compounds because they are formed by sharing of electrons. These are covalent compounds.
Survival of plants in terrestrial environment has been made possible by the presence of
[B] Conducting tissue
[B] Conducting tissue
See lessWhich of the following statements is not true about the compound?
[C] The constituents can be separated by simple physical methods
[C] The constituents can be separated by simple physical methods
See lessSelect the incorrect match.
[C] Lateral meristem Plant elongation
[C] Lateral meristem Plant elongation
See lessTwo chemical species X and Y combine together to form a product P which contains both X and Y, X + Y → P, X and Y cannot be broken down into simpler substances by simple chemical reactions. The following concerning the species X, Y and P are correct?
[D] (i), (iii) and (iv) In this reaction X and Y cannot be broken down into simpler substances by chemical reactions, so X and Y are elements. A compound is a substance composed of two or more elements that are chemically combined in a fixed ratio by mass, so P is a compound with a definite compositRead more
[D] (i), (iii) and (iv)
See lessIn this reaction X and Y cannot be broken down into simpler substances by chemical reactions, so X and Y are elements. A compound is a substance composed of two or more elements that are chemically combined in a fixed ratio by mass, so P is a compound with a definite composition.
What would happen if oxygen availability to activated sludge flocs is reduced?
b. The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
b. The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.
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