CHEM BRAIN

A first order reaction complete its 10% in 20 minutes then time required to complete its 19% is [Kerala CET 2005]

Rate of reaction [Pb. CET 2004] 

In which of the following cases, does the reaction go farthest to completion [UPSEAT 2001]

The velocity constant of a reaction at 290 K was found to be 3.2 x 10^-3 . At 300 K it will be [MP PMT 2004] 

Which reaction characteristics are changing by the addition of a catalyst to a reaction at constant temperature

(i) Activation energy

(ii) Equilibrium constant

(iii) Reaction entropy

(iv) Reaction enthalpy

[DCE 2003]

A reaction is catalysed by ‘X ’. Here ‘X ’ [MP PMT 2003]

Which of the following statements is false in relation to enzyme [MP PMT 2003] 

The rate of a reaction [CPMT 1973]

The main function of a catalyst in speeding up a reaction is 

The temperature coefficient of a reaction is

Velocity constant of a reaction at 290 K was found to be 3.2 x 10^-3. At 310 K it will be about [KCET 1989, 91] 

A catalyst increases the rate of a chemical reaction by [MNR 1988; CPMT 1999; Pb. PMT 2000]

The rate of a reaction is doubled for every 10^o rise in temperature. The increase in reaction rate as a result of temperature rise from 10^o to 100^o is [KCET 1993; Kerala PET 2002; MP PET 2003]

The temperature coefficient for reaction in which food deteriorates is 2. Then food deteriorates ...... times as rapidly at 25^oC as it does at 5^oC 

An increase in temperature by 10^oC generally increases the rate of a reaction by [MP PET 1994; CBSE PMT 2000]

The velocity of the chemical reaction doubles every 10^oC rise of temperature. If the temperature is raised by 50^oC, the velocity of the reaction increases to about 

The rate of a chemical reaction depends upon [AFMC 2002]

The rate of a reaction depends upon the [Pb. PMT 1999] 

A catalyst increases the rate of reaction because it [EAMCET 1992] 

The rate of a gaseous reaction is given by the expression K[A][B]. If the volume of the reaction vessel is suddenly reduced to 1/4th of the initial volume, the reaction rate relating to original rate will be[Roorkee 1992] 

Time required for completion of ionic reactions in comparison to molecular reactions is 

If the concentration of the reactants is increased, the rate of reaction [MP PMT 1989]

In a catalytic conversion of N₂ to NH₃ by Haber's process, the rate of reaction was expressed as change in the concentration of ammonia per time is 40 x 10^-3  mollitre^-1 s^-1. If there are no side reaction, the rate of the reaction as expressed in terms of hydrogen is (in mollitre^-1 s^-1 ) 

When a reaction is progressing 

The concentration of a reactant decreases from 0.2 M to 0.1 M in 10 minutes. The rate of the reaction is 

The rate of chemical reaction at constant temperature is proportional to 

If doubling the concentration of a reactant `A' increases the rate 4 times and tripling the concentration of `A' increases the rate 9 times, the rate is proportional to [AIIMS 1991] 

The rate at which a substance reacts depends on its [MP PMT 1987; BHU 1999; KCET 2005] 

The rate of a reaction that not involve gases is not dependent on [CPMT 1988; AFMC 1995] 

The rate of a chemical reaction [MP PMT 1973; CPMT 1982] 

The rate of a chemical reaction depends upon [AFMC 2002]

A gaseous hypothetical chemical \( 2A \leftrightarrow 4B +C \)  is carried out in a closed vessel. The concentration of B is found to increase by 5 x 10^-3 mol l^-1 in 10 second. The rate of appearance of B is [AFMC 2001]

For the reaction \( N_2 + 3H_2 \rightarrow 2NH_3  \) if \( \frac{\Delta[NH_3]}{\Delta t} \) =2 x 10^-4 mol l^-  s^-  , the value of  \( -\frac{\Delta H_2}{\Delta t} \) would be [MP PMT 2000]

For a given reaction \(   3A + B \rightarrow C + D \)  the rate of reaction can be represented by [DCE 2000] 

The term \(  -\frac{dt}{dc} \)  in a rate equation refers to the [MP PMT 1996] 

For the reaction \( N_2  +  3 H_2  \rightarrow 2NH_3 \)  g under certain conditions of temperature and partial pressure of the reactants, the rate of formation of NH₃ is  0.001 kg h^-1 . The rate of conversion of H₂ under the same conditions is [IIT 1994] 

How will be the rate of reaction, if the slop of the curve is greater near the start of reaction. MDCAT2023

Rate of reaction between two specific time intervals is called [MDCAT2023]

Which is not true about rate of reaction ? NUMS2021

When the change in concentration is 6 x 10^-4moldm^-3 and time for that change in 10 seconds, the rate of reaction will be MDCAT2015

The reaction rate in forward direction decreases with the passage of time because MDCAT2012 

The term \(\frac{-\Delta [A]}{\Delta t} \)in a rate equation refers to the
[MP PMT 1996]

The rate of a gaseous reaction is given by the expression K[A][B]. If the volume of the reaction vessel is suddenly reduced to 1/4th of the initial volume, the reaction rate relating to original rate will be[Roorkee 1992]

If the concentration of the reactants is increased, the rate of reaction
[MP PMT 1989] 

If doubling the concentration of a reactant `A' increases the rate 4
times and tripling the concentration of `A' increases the rate 9
times, the rate is proportional to [AIIMS 1991]

The rate at which a substance reacts depends on its
[MP PMT 1987; BHU 1999; KCET 2005]

The rate of a reaction that not involve gases is not dependent on [CPMT 1988; AFMC 1995] 

The rate of a chemical reaction  [MP PMT 1973; CPMT 1982]