The enthalpy of formation of CO_(g), CO_2(g), N₂O_(g), and N₂O_4(g) is -110, -393, +811 and 10 kJ/mol respectively. For the reaction, N₂O₄+ 3CO_(g) $\to$ N₂O_(g)+ 3CO_2(g);$∆$H_r (kJ/mol) is

• -212

• +212

• +48

• -48

In the van der Waals equation, 'a' signifies

• intermolecular attraction

• intramolecular attraction

• attraction between molecules and wall of container

• volume of molecules

Which of the following is wrong for Bohr model?

• It establishes stability of atom

• It is inconsistent with Heisenberg uncertainty principle.

• It explains the concept of spectral lines for hydrogen like species.

• Electrons behave as particle and wave

For adiabatic process, which is correct?

• $∆$T = 0

• $∆$S = 0

• q = 0

• q_p = 0

Which of the following is not hygroscopic?

• CsCl

• MgCl₂

• CaCl₂

• LiCl

Decreasing order of bond angle is

• BeCl₂ > NO₂ > SO₂

• BeCl₂ > SO₂ > NO₂

• SO₂ > BeCl₂ > NO₂

• SO₂ > NO₂ > BeCl₂

Smallest wavelength occurs for

• Lyman series

• Balmer series

• Paschen series

• Brackett series

8.

K_sp of CaSO₄.5H₂O is 9 $\times$10^-6, find the volume for 1 g of CaSO₄(M.wt. = 136).

• 2.45 litres

• 5.1 litres

• 4.52 litres

• 3.2 litres

Predict the product of reaction of I₂ with H₂O₂ in basic medium

• I^-

• I₂O₃

• IO${}_3^{-}$

• I${}_3^{-}$

Which of the following is not a characteristic of equilibrium?

• Rate is equal in both directions

• Measurable quantities are constant at equilibrium.

• Equilibrium occurs in reversible condition.

• Equilibrium occurs only in open vessel at constant temperature.