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While Fe3+ is stable Mn3+ is not stable in acid solution because ...

A and B are independent events.P(AUB) = 1/2 , P(A) = 1/3 , what is P(B) ? ...

Linked Comprehension This is a comprehension for Questions 16-18 Redox reactions play an important role in chemistry and biology. The values of standard redox potential (E0) of two half cell reactions decide which way the rea ...

x is a negative number.Which is bigger ? x3 or x5 . ...

There are m horizontal parallel lines and n vertical parallel lines which are intersecting.What are the number of distinct rectangles formed by the lines ? ...

PCl5 [eq] PCl3+Cl2 STATEMENT-I: For the above equilibrium addition of inert gas at constant volume doesn't have any effect on the equilibrium. STATEMENT-II: The total pressure of the system is increased on addition of ine ...

In how many ways a three digit number can be formed using numbers from 1 to 9 (repetition not allowed) such that the unit digit is grater than the tenth digit and the tenth digit is grater than the hundredth digit ? ...

x and y are positive integers.What is the probability that x2+y2 is divisible by 5 ? ...

Given standard reduction potential of X and Y are 0.52 and -0.18 V respectively. STATEMENT-I: Y is better reducing agent than X STATEMENT-II: Reduction potential of Y is less than X ...

n fair die are tossed .What is the probability that all of them show the same number on the top surface ? ...

Reasoning Type STATEMENT-I: The endothermic reactions are favoured at lower temperature and the exothermic reactions are favoured at higher temperature. STATEMENT-II: When a system in equilibrium is disturbed by changing the ...

A quadratic curve passes through (0,9) and touches x axis at (3,0).What is the equation of the curve ? ...

x is a positive real number such that x4+1 = 62x2 . Find (x3+1/x3) ...

Rate of physisorption increases with ...

Which of the following statements is false? ...

A queen is placed at a corner of a chess-board.Two squares other than where the queen is placed on are chosen at random.What is the probability that the chosen squares both are in under attack by the Queen ? ...

Which of the following(s) is(are) correct? ...

In the depression of freezing point experiment, it is found that the ...

Z1 , Z2 are two complex numbers such that |Z1|=3 and |Z2 - 12 - 16i|=20 .What is the sum of minimum and maximum value of |Z1 - Z2| ? ...

Multiple Correct Answers Follow In the dissociation of 2AB [eq] A2+B2 , The degree of dissociation is affected by ...

The elevation is boiling point of a solution of 13.44 g of CuCl2 in 1 kg of water using the following information will be (M CuCl2=134.4 and Kb=0.52 K/molal) ...

Which of the reaction defines ΔHf0? ...

The pH of 0.1 M solution of the following salts increases in the order ...

A solution of Palmitic acid (M= 256) in benzene contains 4.24 g of acid per dm3 . When this solution is dropped on a water surface , benzene evaporates and the acid forms a monomolecular layer film of the solid type . If ...

2NO (g) + O2(g) [eq] 2NO2 (g) ; K1 2NO2 (g) [eq] N2O4 (g) ; K2 2NO(g) + O2 (g) [eq] N2O4 (g) ; K3 which of the following relation is correct ? ...

N2O4 [eq] 2NO2 N2O4 is 20% dissociated at 27°C and 1 atm pressure. Find the % dissociation at 27°C and 0.1 atm pressure ...

In an AP series sum of first 12 terms is equal to the sum of first 18 terms.What is the value of sum of first 30 terms ? ...

The vapour pressure of pure benzene is 639.7 mm of mercury and the vapour pressure of a solution of solute in benzene at the same temperature is 631.9 mm of mercury. The molality of the solution is ...

a,b,c are three positive numbers and are in AP.If abc = 8 , what is the minimum value of b? ...

In the above question , what is the force exerted by the top fluid ? Area of cross-section of the block is S. ...