-
The % of N in urea is about ...
-
The simplest formula of a compound containing 50% of element X(atomic mass 10) and 50% of element Y(atomic mass 20) ...
-
280 ml of sulphur vapour at STP weighs 3.2 g. The molecular formula of sulphur is ...
-
A compound contains 74% oxygen & 26% nitrogen by weight. find the formula which has min. molecular weight ...
-
A gas is found to have molecular formula N2Ox. If its vapour density is 54, find x ...
-
The no. of molecules in 4.25 g of NH3 is approximately ...
-
Which has maximum molecules? ...
-
The no. of moles in SO2Cl2 in 13.5 g is ...
-
11.2 litres of a gas at STP are found to have a mass of 16 g. The molecular mass of the gas is ...
-
The activation energy for a simple chemical reaction A→B is Ea in forward direction. The activation energy for the reverse reaction is ...
-
The activation energy of a reaction is zero. The rate constant of the reaction ...
-
lnk is plotted against 1/T, and the slope is ...
-
A first order reaction is 50% complete in 30 minutes at 27°C and in 10 minutes at 47°C. The energy of activation of the reaction is ...
-
The rate constant of the reaction increases because of ...
-
given t1/2 of a reaction of order one is 10 s, find the time taken for 99.9% completion of reaction ...
-
given half life of a reaction of first order is 10 s, find the rate constant of the reaction ...
-
A first order reaction is 75% complete after 32 min. When was 50% of the reaction completed? ...
-
The half life period of a first order is 15 minutes. The amount of substance left after one hour will be ...
-
For the first order reaction, half-life is 14 s.The time required for the initial conc. to reduce to one-eighth of its value is ...
-
The rate law for the eqn (aA+bB→Products) contains only conc. of A. The rate constant of the reaction is 1.3×10-4 L2 mol-2 s-1, find the rate of reaction when the conc. of A is 0.2 mol L-1 ...
-
The rate of the first order reaction X→Products is 7.5×10-4 mol L-1 s-1 when the conc. of X is 0.5 mol L-1. The rate constant is ...
-
with the increase in temperature, the rate constant of a reaction ...
-
In a zero order reaction let a be the initial conc. of A (A→Products) and t be the time of completion of reaction, then rate constant is ...
-
For a reaction of zero order (2A+B→Products) conc. of A changes from 0.05 mol L-1 to 0.03 mol L-1 in 10 seconds, find the rate constant of the chemical reaction ...
-
the rate constant of a reaction is A+B→C is 3×10-2 min-1. The order of the reaction is ...
-
The unit of rate of constant for a zero order reaction is ...
-
Find area enclosed by the complex number x=reiθ r<1 60<θ<180° ...
-
if w=eiθ (θ=60°) w+w2+w3 = ? ...
-
A complex number aeiθ and ae-iθ are rotated anti-clockwise by an angle such that they both overlap the other one! what is the angle of rotation? ...
-
A complex number ae0i is rotated by an angle theta, then by an angle beta. What is its new position? ...