The compressibility of a gas is less than unity at STP, therefore,

• V_m > 22.4 L

• V_m < 22.4 L

• V_m = 22.4

• V_m = 44.8 L

Among the following set of quantum numbers, the impossible set is

• n	l	m	s
  3	2	-3	-1/2

• n	l	m	s
  4	0	0	1/2

• n	l	m	s
  5	3	0	-1/2

• n	l	m	s
  3	2	-2	1/2

Which of the following is least soluble in water?

• C₂H₆

• CH₃OH

• CH₃NH₂

• C₆H₅OH

Among the following compounds, which compound is polar as well as exhibit sp²-hybridisation by the central atom.

• H₂CO₃

• SiF₄

• BF₄

• HClO₃

The energy released when 6 moles of octane is burnt in air will be [Given, ΔH_f for CO₂ (g). H₂O(g) and C₈H₁₈ (l), respectively are -490, -240 and +160J/mol]

• -37.4 kJ

• -20 kJ

• -6.2 kJ

• -35.5 kJ

When 750 mL of 0.5 M HCl is mixed with 250 mL of 2 M NaOH solution, the value of pH will be

• pH = 7

• pH > 7

• pH < 7

• pH = 0

The most stable carbonium ion among the following is

• ${\mathrm{C}}_6{\mathrm{H}}_5 -{\mathrm{CH}}_2\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$

• ${\mathrm{CH}}_3\stackrel{+}{{\mathrm{CH}}_2}$

• ${\mathrm{C}}_6{\mathrm{H}}_5 -\stackrel{+}{\mathrm{C}}-{\mathrm{C}}_6{\mathrm{H}}_5$

• ${\mathrm{C}}_6{\mathrm{H}}_5\stackrel{+}{\mathrm{C}}{\mathrm{H}}_2$

Match the type of series given in Column I with the wavelength range given in Column II and choose the correct option.

Column I		Column II
A	Lyman	1.	Ultraviolet
B.	Paschen	2.	Near-infrared
C.	Balmer	3.	Far Infrared
D.	Pfund	4.	Visible

• A	B	C	D
  1	2	4	3

• A	B	C	D
  4	3	1	2

• A	B	C	D
  3	1	2	4

• A	B	C	D
  4	3	2	1

9.

The electrons identified by quantum numbers n and l, are as follows

1. n =4, l=1

2. n = 4, l = 0

3. n =3, l= 2

4. n = 3, l = 1

If we arrange them in order of increasing energy, i.e., from lowest to highest, the correct order is

• IV<II<III<I

• II<IV<I<III

• I < III < II < IV

• III < I < IV < II

Which of the following is the correct order of stability for the given superoxides?

• KO₂ < RbO₂ < CsO₂

• CsO₂ < RbO₂<KO₂

• RbO₂

• KO₂ < CsO₂ <RbO₂