List of practice Questions

The number of amphoteric oxides from the following is
\(\mathrm{CO_2, GeO_2, SnO_2, PbO_2, CO, GeO, SnO, PbO}\)

Identify the correct statements from the following
I.
All alkaline earth metals give hydrides on heating with hydrogen.
II.
Calcium hydroxide is used to purify sugar.
III.
\( \mathrm{BeCl_2} \) is a dimer in gaseous phase.

Consider the following:
Statement I:
\( \mathrm{H_2O_2} \) acts as an oxidising as well as reducing agent in both acidic and basic media.
Statement II:
10V \( \mathrm{H_2O_2} \) sample means it contains 6% (w/v) \( \mathrm{H_2O_2} \)

Select the correct statements from the following
A)
Aluminium liberates \( \mathrm{H_2} \) gas with dil.\( \mathrm{HCl} \) but not with aqueous \( \mathrm{NaOH} \).
B)
Formula of sodium metaborate is \( \mathrm{Na_3BO_3} \)
C)
Boric acid is a weak monobasic acid
D)
For thallium, +1 state is more stable than +3 state.

Identify the correct statements from the following.
[I.] Glass is an extremely viscous liquid.
[II.] Increase in temperature decreases the surface tension of liquids.
[III.] Compressibility factor for an ideal gas is zero.

5 moles of a gas is allowed to pass through a series of changes as shown in the graph, in a cyclic process.
The processes \(C \rightarrow A\), \(B \rightarrow C\), and \(A \rightarrow B\) respectively are: \[ \text{(Volume = vertical axis, Temperature = horizontal axis)} \]

Consider the following equilibrium reaction in gaseous state at T(K): \[ A + 2B \rightleftharpoons 2C + D \] The initial concentration of B is 1.5 times that of A. At equilibrium, the concentrations of A and B are equal. The equilibrium constant for the reaction is:

1 mole of an ideal gas is allowed to expand isothermally and reversibly from 1L to 5L at 300 K. The change in enthalpy (in kJ) is
(R = 8.3 J K\(^{-1}\) mol\(^{-1}\))

Identify the correct graph for an ideal gas
(\(y\)-axis = compressibility factor \(Z\); \(x\)-axis = pressure \(p\))

Identify the correct statements about the following stoichiometric equation. \[ aP_4 + bOH^- + CH_2O \rightarrow dPH_3 + eH_2PO_2^- \]
[I.] \(a + b + c = 5\)
[II.] \(b + c - e = 3\)
[III.] The oxidation state of P in \(H_2PO_2^-\) is \(+1\)

In the given circuit, if \( A = 0 \), \( B = 1 \), and \( C = 1 \) are inputs, then the values of \( y_1 \) and \( y_2 \) are respectively

If the given figure shows the relation between magnetic field (B along y-axis) and magnetic intensity (H along x-axis) of a ferromagnetic material, then the point that represents coercivity of the material is: