2nd Year Chemistry S-Block Elements
MCQs Chapter No. 2
21. Lime is often used as:
(a) Reducing Agent
(b) Oxidizing Agent
(c) Dehydrating Agent
(d) Catalytic Agent
Answer:
(c) Dehydrating Agent
22. Sodium metal can be stored in:
(a) Alcohol
(b) Kerosene oil
(c) H2O
(d) All
Answer:
(b) Kerosene oil
23. Which of the following alkali metal hydroxide is the strongest base:
(a) LiOH
(b) NaOH
(c) KOH
(d) CsOH
Answer:
(d) CsOH
24. Washing soda has the formula:
(a) Na2CO3.7H2O
(b) Na2CO3.10 H2O
(c) Na2CO3.3H20
(d) Na2CO3
Answer:
(b) Na2CO3.10 H2O
25. Which halide has the highest melting point:
(a) NaCI
(b) NaBr
(c) NaF
(d) Nal
Answer:
(c) NaF
