Test Preparation on IIT JEE Mains Mock Test-13

CHEMISTRY

The pair of compounds which cannot exist together in solution is

1
NaHCO₃ and NaOH
2
Na₂CO₃ and NaHCO₃
3
Na₂CO₃ and NaOH
4
NaHCO₃ and NaCl.

NaHCO₃ reacts with NaOH to form Na₂CO₃.
NaHCO₃ + NaOH ⇋ Na2CO₃ + H₂O

For the reaction 2NO + Cl₂→ 2NOCl, the following data was collected.

1rate=k[NO]2[Cl2]
2rate=k[NO] [Cl2]2
3rate=k[NO][Cl2]
4rate=k[NO]2[Cl2]2

From the values given in the table, it can be seen that when the conc of Cl2 is doubled as in entry 2, the rate of reaction becomes double, so the rate depends upon [Cl2]. Similarly, when conc of NO is doubled (compare entries 2 and 3), the rate of reaction becomes 4 times indicating that rate depends upon [NO]2. therefore, the rate expression for the reaction is rate=k[NO]2[Cl2]

Which of the following reactions takes place at the anode when dilute CuCl₂
the solution is electrolyzed with platinum electrodes?

1
Cu → Cu⁺² + 2_e-
2
2Cl^-→ Cl₂ + 2_e-
3
2H₂O → O^-2+4H + 4_e-
4
2Cu→ Cu₂⁺²+2_e-

Which one of the following is not an acid salt?

1
NaH₂PO₂
2
NaH₂PO₃
3
NaH₂PO₄
4
Na₂HPO₄

NaH2PO2 does not contain any -O-H so it is not an
acid salt.

KF combines with HF to form KHF2 the compound contains species:

1K+ F– and H+
2K+, F– and HF
3K+ and [HF2]–
4[KHF]+ and F–

KF + HF → KHF2; K+HF2-

At 25°C, the solubility of iodine in water is 0.35 g/lit. If distribution coefficient of iodine between CS2 and water is 600, the solubility of iodine in CCl4 will be about

11714 g/lit
2210 g/lit
3569.6 g/lit
4857 g/lit

Solubility of iodine in water = 0.35 g/L = 0.35/254
=0.001378 mol , 600=[I2]_ccl4/0.001378 ,

Solubility of iodine in CCl4 = 600 x 0.001378
= 0.8268 mol or o.8268 x 254 = 210 gL-1.

The spin only magnetic moment of Mn4+ is nearly

13BM
26 BM
34 BM
45 BM

Mn4+ = [Ar]3d3; no. of unpaired electrons = 3

µ_g=√n(n+2)=√3(3+2)=√15=4.0

Which of the following is true when salts like FeCl3, Al2(SO4)3 are applied to stop bleeding

1Albuminoid substance(colloidal blood particles) are coagulated by Fe3+ or Al3+ ions
2pH of the blood increases.
3Denaturation of globular proteins in blood takes place and they change into fibrous proteins.
4pH of the blood remains constant.

The van der Wall’s constant ‘a’ has the dimension of:

1mol/L2
2atm. L2mol-2
3L. atm. mol-1
4atm. L-2mol-1

van der Wall’s constant ‘a’ has the dimension of
atm. L2mol-2


Right Ans	Wrong Ans	Not Attempted

CHEMISTRY The pair of compounds which cannot exist together in solution is

For the reaction 2NO + Cl2→ 2NOCl, the following data was collected.

Which of the following reactions takes place at the anode when dilute CuCl2​the solution is electrolyzed with platinum electrodes?