Answer:
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The technique to improve internal validity is D) Addition of a control group.
<h3>What is
internal validity?</h3>
Internal validity serves as the study which bring about the establishment of a trustworthy cause-and-effect relationship that can be found in treatment and an outcome.
it should be noted that Internal validity also helps to eliminate alternative explanations , hence, The technique to improve internal validity is D) Addition of a control group.
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COMPLETE QUESTOIN:
Which of the following is a technique to improve internal validity ____________?
A) Experimenter expectancy
B) Participant bias
C) Use of a confederate
D) Addition of a control group
Basicity of oxides decreases for elements from left to right in the periodic table. The order of increasing basicity is; Cs2O> MgO > SnO2 > P4O10 > Cl2O7.
The oxides of metals are known to be basic. This is a common property of all metals. However, the basicity of metallic oxides decreases across the period. So, from left to right, the oxides of bases become less acidic.
On the other hand, the oxides of nonmetals are acidic in nature. So as we move from left to right, the oxides of metals become more acidic. The order of decreasing basicity of oxides as listed in the question is;
Cs2O> MgO > SnO2 > P4O10 > Cl2O7.
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Answer:
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