Class 11th

If |x| < 1, |y| < 1 and x ≠ y, then the sum to infinity of the following series (x+y) + (x²+xy+y²) + (x³+x²y+xy²+y³) + . is

If |x| < 1, |y| < 1 and x ≠ y, then the sum to infinity of the following series (x+y) + (x²+xy+y²) + (x³+x²y+xy²+y³) + . is

The elevation of boiling point of 0.10 m aqueous CrCl₃·xNH₃ solution is two times that of 0.05 m aqueous CaCl₂ solution. The value of x is [numerical value]. [Assume 100% ionisation of the complex and CaCl₂, coordination number of Cr as 6, and that all NH₃ molecules are present inside the coordination sphere]

In Carius method of estimation of halogen, 0.172 g of an organic compound showed presence of 0.08 g of bromine. Which of these is the correct structure of the compound?

Potassium chlorate is prepared by the electrolysis of KCl in basic solution 6OH⁻+Cl⁻→ClO₃⁻+3H₂O+6e⁻. If only 60% of the current is utilized in the reaction, the time (rounded to the nearest hour) required to produce 10 g of KClO₃ using a current of 2 A is [numerical value] (Given: F=96,500 Cmol⁻¹; molar mass of KClO₃=122 g mol⁻¹)

Consider the following reactions A→P1; B→P2; C→P3; D→P4.

The order of the above reactions are a,b,c and d, respectively. The following graph is obtained when log[rate] vs log[conc.] are plotted.

 Among the following, the correct sequence for the order of the reactions is:

On heating compound (A) gives a gas (B) which is a constituent of air. This gas when treated with H? in the presence of a catalyst gives another gas (C) which is basic in nature. (A) should not be:

The species that has a spin-only magnetic moment of 5.9BM, is: (Td=tetrahedral)

The variation of equilibrium constant with temperature is given below:
Temperature: T₁=25°C, T₂=100°C
Equilibrium Constant: K₁=10, K₂=100
The value of ∆H°, ∆G° at T₁ and ∆G° at T₂ (in kJmol⁻¹) respectively, are close to
[Use R=8.314JK⁻¹mol⁻¹]

For the following assertion and reason, the correct option is
Assertion(A): When Cu(II) and sulphide ions are mixed they react together extremely quickly to give a solid
Reason(R): The equilibrium constant of Cu²?(aq) + S²?(aq) ? CuS(s) is high because the solubility product is low