An electron is in an excited state in a hydrogen like atom. It has a total energy of -3.4 eV. The kinetic energy is E and its de Broglie wavelength is λλ. Then

E = 6.8 eV, λ = 6.6 × 10 −10 m

E = 3.4 eV, λ = 6.6 × 10 −10 m

E = 3.4 eV, λ = 6.6 × 10 −11 m

E = 6.8 eV, λ = 6.6 × 10 −11 m

Which one of the following reactions of Xenon compounds is not feasible?

3XeF 4 +6H 2 O⟶2Xe+XeO 3 +12HF+1.5O 2

One mole of a non-ideal gas undergoes a change of state(2.0 atm, 3.0 L, 95 K) ⟶ (4.0 atm, 5.0 L, 245 K) with a change in internal energy, ΔE = 30.0 L-atm. The change in enthalpy (ΔH) of the process in L-atm

Not defined, because pressure is not constant

The catalyst used in the manufacture of polyethylene by Ziegler method is

Titanium tetrachloride and triphenyl aluminium

Titanium tetrachloride and triethyl aluminium

Which of the following facts about the complex [Cr(NH 3 ) 6 ]Cl 3 is wrong?

The complex involves d 2 sp 3 hybridisation and is octahedral in shape.

The complex is an outer orbital complex.

The complex gives white precipitate with silver nitrate solution.

Consider the reaction 2NO(g)+O 2 (g) ⟶ 2NO 2 (g) Predict whether the reaction is spontaneous at 298 K. Δ f G(NO) = 86.69kJ/mol,Δ f G(NO 2 ) = 51.84kJ/mol

No, the reaction is Non-spontaneous

Consider the straight line ax + by = c, where a, b, c ∈ R + this line meets the coordinate axes at A and B respectively. If the area of the ΔOAB, O being origin, is always a constant equal to half, then

The three numbers a,c,b are in AP

The three numbers a,c,b are in GP

The three numbers are a,c,b in HP

The equation of the smallest circle passing through the intersection of the line x + y = 1 and the circle x 2 + y 2 = 9 is

x 2 + y 2 − x − y − 8 = 0

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