BSEH 12th Chemistry Sample Paper 2024


Haryana open school Senior Secondary Chemistry sample paper Exam. Practice these MCQs based on Previous Year Questions for your annual exam.

Students can also join my online dedicated calss for annual exam 2026 where students studies Complete syllabus, PYQs and Sample Paper.

Read also BSEH 12th Chemistry Sample Papers and Annual Exam Papers


Haryana open school Class 12th Chemistry Sample Paper Exam 2024

1. Which of the following is an example of solid solution?

a) Copper dissolved in Gold.
b) Glucose in water
c) Camphor in nitrogen gas
d) None of these


View Answer

Copper dissolved in Gold.


2. Value of KH for a gas is:

a) Constant at all temperatures
b) Increases with increase in temperature.
c) Decreases with increase in temperature.
d) Increases with decrease in temperature.


View Answer

Increases with increase in temperature.


3. What is SI unit of conductivity?

a) S cm
b) S cm-1
c) S m
d) S m-1


View Answer

S m-1.


4. Which of the following is an example of corrosion?

a) Tarnishing of silver
b) Rusting of iron
c) Green coating on copper
d) All of these


View Answer

All of these.


5. Which of the following cannot be molecularity of a chemical reaction?

a) 0
b) 1
c) 2
d) 3


View Answer

0.


6. What is represented by A in Arrhenius equation?

a) Temperature
b) Frequency factor
c) Activation energy
d) Collision frequency


View Answer

Frequency factor.


7. Which of the following does not exhibit variable oxidation state?

a) Sc
b) Cu
c) Ti
d) Fe


View Answer

Sc.


8. Which of the following is a coordination compound of cobalt?

a) Vitamin B12
b) Chlorophyll
c) Haemoglobin
d) All of the above


View Answer

Vitamin B12.


9. Which reagent is used in Finkelstein reaction?

a) NaCl
b) NaBr
c) NaI
d) All of the above


View Answer

NaI.


10. Which of the following has the lowest boiling point?

a) Pentan-1-ol
b) n-Butane
c) Pentanal
d) Ethoxyethane


View Answer

n-Butane.


11. What is IUPAC name of cinnamaldehyde?

a) 2-Hydroxybenzaldehyde
b) 3-Phenylprop-2-en-1-al
c) 3-Hydroxybenzaldehyde
d) 3-Phenylbut-2-en-1-al


View Answer

3-Phenylprop-2-en-1-al.


12. What is the type of isomerism between Propan-1-amine and Propan-2-amine?

a) Chain isomerism
b) Functional group isomerism
c) Position isomerism
d) Optical isomerism


View Answer

Position isomerism.


13. Which of the following is not a disaccharide?

a) Sucrose
b) Ribose
c) Maltose
d) Lactose


View Answer

Ribose.


14. Which of the following is involved in blood clotting?

a) Vitamin A
b) Vitamin C
c) Vitamin E
d) Vitamin K


View Answer

Vitamin K.


15. Assertion (A): Study of actinoids is difficult than study of lanthanoids.
Reason (R): Actinoids are radioactive elements.

a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.


View Answer

Both A and R are true, and R is the correct explanation of A.


16. Assertion (A): Thiocyanate ligand can cause linkage isomerism.
Reason (R): Ambidentate ligands result in linkage isomerism in coordination compounds.

a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.


View Answer

Both A and R are true, and R is the correct explanation of A.


17. Assertion (A): Alcohols are readily soluble in water.
Reason (R): Alcohols form hydrogen bonding with water.

a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.


View Answer

Both A and R are true, and R is the correct explanation of A.


18. Assertion (A): When nucleotide is linked to phosphoric acid, we get a nucleoside.
Reason (R): Nucleotides are joined together by phosphodiester linkage.

a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.


View Answer

A is false but R is true.


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