Chemistry MCQS

301. PH of human blood is:
A. 6.4
B. 7.4
C. 7.1
D. 5.5

302. Acidic buffer can resist a change in PH when a small amount of:
A. Strong acid is added
B. Strong base is added
C. Both
D. None

303. Solution of which salt has the highest PH?
A. CH3COOK
B. NA2CO3
C. NH4Cl
D. NANO3

304. NH4Cl solution is:
A. Neutral
B. Acidic
C. Basic
D. Amphoteric

305. PH of a centi-molar solution of a strong monobasic acid is:
A. 1
B. 2
C. 4
D. 3

306. Solution of the salt of a strong acid and strong base is neutral because:
A. Only cation gets hydrolyzed
B. Only anion gets hydrolyzed
C. Both ions are hydrolyzed
D. Neither cation nor anion gets hydrolyzed

307. Chemical kinetics deal with:
A. Rate of reaction
B. Factors affecting reaction rate
C. Mechanism of reaction
D. All of the above

308. Unit of reaction rate is:
A. Mol.L⁻¹, Sec⁻¹
B. Mol.sec⁻¹
C. Mol.sec
D. Sec.Mol⁻¹

309. Rate of reaction depends upon:
A. Concentration of reactants
B. Nature of reactants
C. Temperature
D. All of these

310. For a chemical reaction; A > B, the rate of reaction increases four times when the concentration of reactant A is doubled; the order of reaction is:
A. Zero
B. First
C. Second
D. Half