Which one of the following compounds shows the presence of an intramolecular hydrogen bond?

1. H₂O₂

2. HCN

3. Cellulose

4. Concentrated acetic acid

The molar conductivity of a 0.5 mol/dm³ solution of AgNO₃ with electrolytic conductivity of 5.76 × 10^–3 S cm^–1 at 298 K is:

The decomposition of phosphine (PH₃) on tungsten at low pressure is a first-order reaction. It is because the:

1. rate is proportional to the surface coverage

2. rate is inversely proportional to the surface coverage

3. rate is independent of the surface coverage

4. rate of decomposition is very slow

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As₂S₃ are given below 
I. (NaCl) = 52, II. (BeCl₂) = 0.69, III. (MgSO₄) = 0.22 
What is the correct order of their coagulating power?
1. I > II > III
2. II > I >III
3. III > II > I
4. III > I >II

During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is:

1. 55 minutes

2. 110 minutes

3. 220 minutes

4. 330 minutes

How many electrons can fit in the subshell for which n = 3 and l = 1?

For a sample of a perfect gas when its pressure is changed isothermally from P_i to P_f, the entropy change is given by:

1. $∆\mathrm{s}=\mathrm{nR}$ $\ln$ $\left(\frac{{\mathrm{p}}_{\mathrm{f}}}{{\mathrm{p}}_{\mathrm{i}}}\right)$

2. $∆\mathrm{s}=\mathrm{nR}$ $\ln$ $\left(\frac{{\mathrm{p}}_{\mathrm{i}}}{{\mathrm{p}}_{\mathrm{f}}}\right)$

3. $∆\mathrm{s}=\mathrm{nRT}$ $\ln$ $\left(\frac{{\mathrm{p}}_{\mathrm{f}}}{{\mathrm{p}}_{\mathrm{i}}}\right)$

4. $∆\mathrm{s}=\mathrm{RT}$ $\ln$ $\left(\frac{{\mathrm{p}}_{\mathrm{i}}}{{\mathrm{p}}_{\mathrm{f}}}\right)$

The van’t Hoff factor (i) for a dilute aqueous solution of a strong electrolyte barium hydroxide is:

1. 0
2. 1
3. 2
4. 3

The percentage of pyridine (C₅H₅N) that forms pyridinium ion (C₅H₅N⁺H) In A 0.10 M aqueous pyridine solution (K_b for C₅H₅N = 1.7 × 10^–9) is?

In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion (Ca²⁺) and fluoride ion (F^-) are:

1. 4 and 2

2. 6 and 6

3. 8 and 4

4. 4 and 8