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