List of practice Questions

Match the following:
List-I (Reaction)
  • A) Hydrogenation of vegetable oils
  • B) Decomposition of potassium chlorate
  • C) Oxidation of SO2 in lead chamber process
  • D) Oxidation of ammonia in Ostwald’s process

List-II (Catalyst)
  • I) Ni
  • II) MnO2
  • III) Pt
  • IV) NO(g)
The critical micelle concentration (CMC) of a soap solution is \( 5 \times 10^{-4} \, \text{mol L}^{-1} \). Identify the correct statements about this solution.
[I.] The micelle is stable if the soap solution concentration is \( 10^{-7} \, \text{mol L}^{-1} \)
[II.] The micelle is stable if the soap solution concentration is higher than \( 5 \times 10^{-4} \, \text{mol L}^{-1} \)
[III.] Micelles are also known as associated colloids.
The metal purified by Mond process is X. The number of unpaired electrons in X is
Complete hydrolysis of Xenon hexafluoride gives HF along with compound X. The hybridisation in X is
KMnO\(_4\) oxidises hydrogen sulphide in acidic medium. The number of moles of KMnO\(_4\) which react with one mole of hydrogen sulphide is
Identify the set which does not have ambidentate ligand(s).
The number of linear and crosslinked polymers in the following respectively are:
Novolac, Nylon 6,6, Bakelite, PVC, melamine
Consider the sets I, II and III. Identify the set(s) which is (are) correctly matched.
[I.] Staggered ethane>eclipsed ethane \dotfill torsional strain
[II.] 2,2-Dimethylbutane>2-methylpentane \dotfill boiling point
[III.] cis-But-2-ene>trans-But-2-ene \dotfill dipole moment
A solution is prepared by adding 124 g of ethylene glycol (molar mass = 62 g mol\(^{-1}\)) to \( x \) g of water to get a 10 m solution. What is the value of \( x \) (in g)?
For a reaction, the graph of \( \ln k \) (on y-axis) and \( 1/T \) (on x-axis) is a straight line with a slope \( -2 \times 10^4 \text{ K} \). The activation energy of the reaction (in kJ mol\(^{-1}\)) is \((R = 8.3~\text{J K}^{-1} \text{mol}^{-1})\)
At T(K), \(K_{\text{sp}}\) of two ionic salts MX\(_2\) and MX is \(5 \times 10^{-13}\) and \(1.6 \times 10^{-11}\) respectively. The ratio of molar solubility of MX\(_2\) and MX is
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.
The number of amphoteric oxides from the following is
\(\mathrm{CO_2, GeO_2, SnO_2, PbO_2, CO, GeO, SnO, PbO}\)
Which of the following statements is not correct?
The order of dipole moments of H\textsubscript{2}O (A), CHCl\textsubscript{3} (B) and NH\textsubscript{3} (C) is
Identify the correct graph for an ideal gas
(\(y\)-axis = compressibility factor \(Z\); \(x\)-axis = pressure \(p\))
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.
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 \(+1\)
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: \[ \text{(Volume = vertical axis, Temperature = horizontal axis)} \]
5 moles of a gas is allowed to pass through a series of changes as shown in the grap
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:
In a transistor, if the collector current is 98% of emitter current, then the ratio of the base and collector currents is
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
A=0B=1C=1
In amplitude modulation, if a message signal of 5 kHz is modulated by a carrier wave of frequency 900 kHz, then the frequencies of the side bands are
The wavelength of a particular electron transition for He\(^+\) is 100 nm. The wavelength (in \(\unicode{x212B}\)) of H atom for the same transition is
The energy of second Bohr orbit of hydrogen atom is \(-3.4 \, \text{eV}\). The energy of the fourth Bohr orbit of the He\(^+\) ion will be