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Which of the following decreases the rate of reactions?

Which of the following decreases the rate of reactions? Correct Answer Catalytic poison

A catalytic poison is a substance which destroys the activity of the catalyst even if it is present in trace amounts. Eg: In the manufacture of sulphuric acid by contact process, any arsenic impurity present in the reacting gases will destroy the activity of vanadium pentoxide catalyst.

Related Questions

How is the rate of transpiration affected by decreasing humidity and by decreasing light intensity?   Decreasing humidity  Decreasing light intensity   (a).  Decreases Decreases  (b). Increases Decreases  (c). Increases Increases  (d). Decreases Increases
Which of the following statements are true/false?
1. A minimum rate of wages for the time spent by employees for the production of output is minimum time rate.
2. Minimum piece rate is the rate based on the quantity of the output employees have produced.
3. The guaranteed time rate is a minimum rate of remuneration to apply in the case of employees employed on piece work for the purpose of securing to such employees a minimum rate of wages on a time work basis.
4. A minimum rate of remuneration to apply in the case of employees employed on piece work for the purpose of securing to such employees a minimum rate of wages on a time work basis is overtime rate.
S1: Different countries show different pattern of growth.
P: Many others have a high birth rate with a low death rate.
Q: Some have a high birth rate and still have a high death rate.
R: The developing countries show the most rapid growth rate.
S: Some others like the European nations, have a low birth rate and a low death rate.
S6: Compared to this in Europe the growth rate is low.

The Proper sequence should be:
Consider the following statements with reference to the periodic table of chemical elements.
1. Ionization potential gradually decreases along a period.
2. In a group of elements, electron affinity decreases as the atomic weight increases.
3. In a given period, electronegativity decreases as the atomic number increases.
Which of these statement(s) is/are correct?
According to Griffith theory, which of the following are true for the fracture stress in a brittle material?
P. Increases with increasing surface energy
Q. Decreases with increasing elastic modulus
R. Decreases with increasing length of pre-existing crack
S. Decreases with increasing number of pre-existing cracks of same size
Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R). Read the statements and choose the correct answer:
Assertion (A) The nominal interest rate comprises of a real interest rate and an expected rate of inflation and it adjusts when the inflation rate is expected to change. Hence, in the perfect international capital markets, real rate of returns are equal in the two countries.
Reason (R) The international fisher effects states that the nominal interest rate differential must be equal to the expected inflation rate differential In the two countries.
Consider the following statements with reference to evaporation : 1. Rate of evaporation decrease with an increase in surface area. 2. Rate of evaporation increases with an Increase in temperature. 3. Rate of evaporation decreases with an increase in humidity. 4. Rate of evaporation increases with an increase in wind speed. Which of the above statement are correct?
Examine the following statements: A. Repo rate is the rate at which the Reserve Bank of India borrows money from commercial banks within India. B. Reverse repo rate is the rate at which the RBI lends money to commercial banks in the event of any shortfall of funds. C. The RBI increased the repo-rate and reverse repo rate by 25 basis points to 6.5% and 6.25%, respectively on August 1, 2018 Choose the correct answer:
The line chart given below shows the birth rate (per thousand persons) and death rate (per thousand persons) of countries P, Q, R and S in the year 2018. Which of the following statement(s) is/are correct? I. Birth rate of country Q is 9.2 percent more than country R. II. Birth rate of country R is 11.76 percent more than the birthrate of country S. III. Birth rate of country Q is 32 percent more than the birth rate of country S.
In a reaction, A + B → Product, when the concentration of B is doubled the rate is doubled, and when the concentrations of both the reactant doubled the rate is increased by a factor of 8, rate law can be written as: 2 b) Rate = k2 c) Rate = k d) Rate = k22