MDCAT XII Chemistry Biochemistry + S & P Block Online Test-2

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Test Details:

Subject: Chemistry
Class: 2nd year or 12
Chapter Name: Biochemistry + S & P Block
Test: MDCAT 2025
Book: Sindh Textbook
Total No. Of MCQS: 50 MCQS
Time Allowed: 50 Minutes
Price: Free

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117

Created on May 04, 2025 By

medicoengineer.com

MDCAT XII Chemistry Biochemistry + S and P Online Test-2

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NameDistrictEmailPhone Number

1 / 50

1. The flame colour of rubidium is:

a) Blue violet

b) Violet

c) Red violet

d) Orange violet

2 / 50

2. Density and melting point of caustic soda is:

a) 1.84 g/cm³, 290 °C

b) 1.52 g/cm³, 290 °C

c) 1.84 g/cm³, 604 °F

d) 1.52 g/cm³, 604 °F

3 / 50

3. In a Castner-Kellner cell, __________ is used and reduction occurs at __________.

a) Molten NaOH, mercury

b) Molten NaCl, mercury

c) Molten NaCl, titanium

d) None of these

4 / 50

4. Chlorine gas is obtained when calcium hypochlorite reacts with:

a) Water

b) NaOH

c) HCl

d) Generally, it breaks into chlorine gas

5 / 50

5. Sundar and Sameer are two friends, each having a box. Sundar has elements of Group 3 and 4, while Sameer has excess hydrogen gas in it. They mixed both at high temperature. What will be the product?

AlH₃
BH₃
PbH₄
GeH₄
SiH₄

a) 1, 2, 3, 4, 5

b) 1, 2

c) 3, 4, 5

d) 5

6 / 50

6. Density of silicon and boron is:

a) 2.35 g/cm³, 2.34 g/cm³

b) 2.38 g/cm³, 2.37 g/cm³

c) 2.34 g/cm³, 2.35 g/cm³

d) 2.37 g/cm³, 2.38 g/cm³

7 / 50

7. Formula of borax is:

a) Na₂B₄O₇

b) NaB₄O₇

c) NaB₄O₇·10H₂O

d) Na₂B₄O₇·10H₂O

8 / 50

8. If the first element belongs to the 3rd period and 2nd group, then its diagonal element belongs to which group and period?

a) 4th, 3rd

b) 3rd, 2nd

c) 3rd, 4th

d) 2nd, 3rd

9 / 50

9. Find the functions of H₂SO₄:

Refining petroleum
Etching
Manufacturing lead-based battery
Fertilizer

a) 1, 2, 3, 4

b) 2, 3, 4

c) 1, 2, 4

d) 3, 4

10 / 50

10. 2NaF reacts with chlorine gas. The product is:

a) 2NaCl + F₂

b) NaCl + 2F

c) 2NaCl + 2F

d) None of these

11 / 50

11. Kestose is made up of:

a) Glucose–Fructose–Glucose

b) Fructose–Glucose–Fructose

c) Glucose–Fructose–Fructose

d) Fructose–Glucose–Glucose

12 / 50

12. Closed-chain form of glucose is called _______ and it is relatively _______.

a) Pyranose, unstable

b) Pyranose, stable

c) Furan, unstable

d) Furan, stable

13 / 50

13. Normal range of blood glucose is:

a) 90 mg per 100 dL

b) 70 to 90 mg per 100 dL

c) 70 to 110 g per 100 dL

d) None of these

14 / 50

14. Percentage of lactose in cow milk:

a) 3 to 4%

b) 4 to 6%

c) 5 to 8%

d) 4 to 5%

15 / 50

15. Hassan is good at eating. He eats 2 kilograms of carbohydrates. How many calories did he get?

a) 4000 calories

b) 400 calories

c) 800 calories

d) 8000 calories

16 / 50

16. Cholic acid is found as:

a) K

b) Li

c) Na

d) Al

17 / 50

17. State of wax is:

a) Solid

b) Liquid

c) Gas

d) Semi-solid

18 / 50

18. During the saponification of fat and oil, the product is:

a) Soap and 1,2,3-propan-tri-al

b) Soap and glyoxal

c) Soap and 1,2,3-propantriol

d) None

19 / 50

19. Total number of essential minerals in Vinod's body is:

a) 25

b) 22

c) 16

d) 24

20 / 50

20. Example of tertiary structure of protein:

a) Insulin

b) Haemoglobin

c) Hair

d) Myoglobin

21 / 50

21. Element that belongs to the s-block but is placed in the p-block:

a) Hydrogen

b) Helium

c) Argon

d) Aluminum

22 / 50

22. Find the one having both halogen and alkali metal characters:

a) Helium

b) Chlorine

c) Sodium

d) Hydrogen

23 / 50

23. What happens to the metallic nature as we move from right to left in groups?

a) Increases

b) Decreases

c) Remains constant

d) Irregular

24 / 50

24. The outer shell electronic configuration of transition block elements is given by ________.

a) (n-1)d¹–¹⁰ns²

b) (n-1)d¹–¹⁰(n-1)s⁰–²

c) (n-1)d¹–¹⁰ns⁰–²

d) nd¹–¹⁰ns⁰–²

25 / 50

25. Which of the following is not a metalloid?

a) Germanium

b) Silicon

c) Indium

d) Tellurium

26 / 50

26. What is the correct order of electron affinity among O, F, and Cl?

a) O < Cl < FO < Cl < F

b) O < F < Cl

c) F < O < Cl

d) Cl < O < F

27 / 50

27. Arrange them according to melting point:

a) PF₃ < AsF₃ < SbF₃ < BiF₃

b) BiF₃ < AsF₃ < PF₃ < SbF₃

c) BiF₃ < SbF₃ < PF₃ < AsF₃

d) PF₃ < SbF₃ < AsF₃ < BiF₃

28 / 50

28. Which compound has the lowest degree of ionic character?

a) MgCl₂

b) NaCl

c) AlCl₃

d) CaCl₂

29 / 50

29. Which alkali metal is the least dense?

a) Li

b) Na

c) K

d) Cs

30 / 50

30. Which halogen has the lowest boiling point?

a) I₂

b) Cl₂

c) Br₂

d) F₂

31 / 50

31. Which oxide is amphoteric?

a) BeO

b) Al₂O₃

c) Ga₂O₃

d) A and B

32 / 50

32. Which alkali metal reacts with water most vigorously?

a) Li

b) Na

c) K

d) Cs

33 / 50

33. Which of the following metal hydroxides is most basic?

a) Mg(OH)₂

b) Ca(OH)₂

c) Sr(OH)₂

d) Ba(OH)₂

34 / 50

34. Which halogen acid should have the highest bond dissociation enthalpy?

a) HBr

b) HCl

c) HF

d) HI

35 / 50

35. Which of the following has the lowest melting and boiling point?

a) Be

b) Mg

c) Ca

d) Sr

36 / 50

36. Electronegativity of silicon is:

a) 2.5

b) 1.5

c) 2.0

d) 1.8

37 / 50

37. Atomic radius of Br₂ is:

a) 228 pm

b) 266 pm

c) 114 pm

d) 133 pm

38 / 50

38. Which of the following is used in muscle contraction and maintaining heart and bone function?

a) Ca

b) K

c) Li

d) Mg

39 / 50

39. OF₂ is ______.

a) Yellow-colored solid

b) Brown-colored solid

c) Pink-colored solid

d) None

40 / 50

40. Potash alum is a:

a) Complex salt

b) Acid salt

c) Double salt

d) Normal salt

41 / 50

41. Alkali metals are highly reactive, so they are kept in ______ to avoid explosion.

a) Gasoline

b) Petroleum

c) Diesel

d) Kerosene

42 / 50

42. Second ionization potential (I.P.) of alkali metals is high due to:

a) Being s-block elements

b) Inert gas configuration

c) ns¹ electronic configuration

d) Being metals

43 / 50

43. Which of the following forms normal oxides?

a) Lithium

b) Sodium

c) Potassium

d) Rubidium

44 / 50

44. Molecular formula of fuming sulphuric acid is:

a) H₂S₂O₆

b) H₂S₂O₈

c) H₂S₂O₇

d) None

45 / 50

45. Oxidation state of Be is:

a) +1

b) +2

c) -2

d) A and B

46 / 50

46. Sulphuric acid is a:

a) Sulphuric acid is a:

b) Reducing agent

c) Hydrating agent

d) Catalytic agent

47 / 50

47. Which of the following properties of alkali metals increases with atomic number?

a) Electronegativity

b) Ionic radius

c) First ionization enthalpy

d) Melting point

48 / 50

48. Reaction of alkali metals with water is:

a) Endothermic

b) Exothermic

c) Sometimes both

d) None of these

49 / 50

49. Best source of energy for the brain is:

a) Fructose

b) Mannose

c) Glucose

d) Sucrose

50 / 50

50. Lactase is generally present in:

a) Men

b) Women

c) Children

d) Elderly

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