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NEET Chemistry Solved Question Paper 2008

Multiple Choice Questions

Equal volumes of three acid solutions of pH 3.4 and 5 are mixed in a vessel. What will be the H⁺ ion concentration in the mixture?

1.11 x 10^-4 M
3.7 x 10^-4 M
3.7 x 10^-3 M
3.7 x 10^-3 M

2181 Views

The angular shape of ozone molecule (O₃) consists of

1 sigma and 2 pi bonds
2 sigma and 2 pi bonds
1 sigma and 1 pi bonds
1 sigma and 1 pi bonds

785 Views

3.
Which of the following are not state functions?
I) q + W
II) q
III) W
IV) H-TS

(I) and (IV)

(II) (III) and (IV)

(I), (II) and (III)

(I), (II) and (III)

(I), (II) and (III)

A state function is the property of the system whose value depends only on the initial and final state of the system and is independent of the path.

Therefore,

Internal energy (ΔE) = q +W
It is a state function because it is independent of the path. It is an extensive property.

∴ Gibbs energy (G) = H -TS

It is also a state function because it is independent of the path. It is also extensive property.
Heat (q) and work (W) are not state functions being path dependent.

639 Views

If uncertanity in position and momentum are equal, then uncertaninty in velocity is

$fraction numerator 1 over denominator 2 straight m end fraction square root of straight h over straight pi end root$
$square root of fraction numerator straight h over denominator 2 straight pi end fraction end root$
$1 over straight m square root of h over pi end root$
$1 over straight m square root of h over pi end root$

477 Views

The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr(24) and Mn (25) is

Cr > Mn> V > Ti
V > Mn > Cr >Ti
Mn > Cr> Ti >V
Mn > Cr> Ti >V

917 Views

If a gas expands at constant temperature, it indicates that

the kinetic energy of molecules decrease
the pressure of the gas increases
the kinetic energy of molecules remains the same
the kinetic energy of molecules remains the same

419 Views

For the gas phase, reaction,

PCl₅ (g) ⇌ PCl₃ (g) Cl₂ (g)
Which of the following conditions are correct?

Δ H = 0 and ΔS > 0
ΔH >0 and ΔS > 0
Δ H < 0 and ΔS < 0
Δ H < 0 and ΔS < 0

1482 Views

Number of moles of MnO₄^- required to oxidies one mole of ferrous oxalate completely in acidic medium will be

0.6 mole
0.4 mole
7.5 mole
7.5 mole

407 Views

If the concentration of OH^- ions in the reaction Fe(OH)₃ (s) ⇌ Fe³⁺ (aq) + 3OH^-(aq) is decreased by 1/4 times, then equilibrium concentration of Fe³⁺ will increase by