Chemistry Test 51

Result

Chemistry Test 51

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Weekly Quiz Competition

Question 1
4 / -1

For the gaseous reactions

A → B k₁ = 10¹⁵ e^{–25000/8.314T}

C → D k₂ = 10¹⁴ e^{–15000/8.314T}

Calculate the approxmate value of temperature at which k₁ = k₂. [ln 10 = 2.3]

A
522 K

B
434 K

C
320 K

D
500 K
Question 2
4 / -1

Which of the following statements are correct ?

a. The smaller the gold number of lyophilic colloid, the larger will be its protective power.

b. Lyophilic sols, in contrast to lyophobic sols are easily coagulated on addition of small amounts of electrolytes.

c. Ferric chloride solution is used to stop bleeding from a fresh cut because it coagulates the blood.

d. The flocculation value of arsenious sulphide sol is independent of the anion of the coagulating electrolyte.

A
a, b and c

B
a, c and d

C
b, c and d

D
a, b and d

Solution

a, c, d are correct