Here we are going to provide class 12 chemistry chapter 13 D-Block Element solved MCQs that help Sindh board students in their exam.
12 Class Chemistry Chapter 13 MCQs with Answers
This 2nd year’s chemistry chapter 13 Sindh board MCQs with Answers are also helpful for Karachi, Hyderabad, Larkana, and Sukkur board students in their examination preparation.
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| 12th Class Chemistry Chapter 12 MCQs |
1. Quartz in investment material is added for _______
a) Strength
b) Expansion components for casting shrinkage
c) Decrease strength
d) Contraction
Answer: b) Expansion components for casting shrinkage
2. Raw materials used for manufacture of glass are ________
a) Sand/charcoal/soda
b) Sand/soda/limestone
c) Limestone/charcoal/Sulphur
d) Sand/Sulphur/soda
Answer: b) Sand/soda/limestone
3. Which of the following is used for silvering of mirrors
a) Silver nitrate
b) Zinc nitrate
c) Silver oxide
d) Pitch blends
Answer: a) Silver nitrate
4. Which carbohydrate can be used for silvering of mirror:
a) Glucose
b) Fructose
c) Maltose
d) All of the above
Answer: a) Glucose
5. Gold content of an 18-carat alloy is _________
a) 0.25
b) 0.5
c) 0.75
d) 1
Answer: c) 0.75
6. Among the following reactions, the fastest rate is for:
a) Precipitation of silver chloride by mixing silver nitrate and sodium chloride solutions
b) Conversion of monoclinic Sulphur to rhombic Sulphur
c) Burning of charcoal
d) Rusting of iron in moist air
Answer: a) Precipitation of silver chloride by mixing silver nitrate and sodium chloride solutions
7. Aqueous ammoniacal silver nitrate solution is called _________.
a) Benedict’s reagent
b) Nessler’s reagent
c) Tollen’s reagent
d) Fehling’s reagent
Answer: c) Tollen’s reagent
8. The most common example of corrosion is:
a) Chemical decay
b) Rusting of iron
c) Rusting of tin
d) Rusting of aluminum
Answer: b) Rusting of iron
9. ____________ is depositing one metal over the other by means of electrolysis.
a) Greasing
b) Alloying
c) Staining
d) Electroplating
Answer: d) Electroplating
10. _________ is a homogenous mixture of one metal with one or more other metals or non-metals
a) Greasing
b) Alloying
c) Staining
d) Painting
Answer: b) Alloying
11. Corrosion resistant metals are _________.
a) Zn
b) Sn
c) Cr
d) All of the above
Answer: d) All of the above
12. The formula of rust is:
a) Fe2O3nH2O
b) Fe2O3
c) Fe (OH)3nH2O
d) Fe2O2
Answer: a) Fe2O3nH2O
13. Coating a glass plate with silver is called silvering of mirror.
a) TRUE
b) FALSE
Answer: a) TRUE
14. Silvering of mirror can also be carried out by spraying method.
a) TRUE
b) FALSE
Answer: a) TRUE
Conclusion
The topic of this post is class 12 chemistry chapter 13 mcqs with solved answers that help students for board exam preparation.