Previous Year Board Exam Questions with Answers

Will you please provide me the Previous Year Board Exam Questions with Answers of the 12th???

Hello sir, Im preparing for 10th board exam. I want Previous Year Board Exam Questions with Answers. Will you please provide me Previous Year Board Exam Questions with Answers?

[shikha]

Every year in the month of March/April all the State and Central Board conducts Class Xth / Xllth Examination.

All the Private and Regular Students are needed to download 10th Class question paper.

The Board also provides Exam Date through News Paper so they can also check Local News Paper to know about their Exam Date.


Previous Year Board Exam Questions with Answers:

Section A

1. Which gas is present in Bio gas and CNG? Write its molecular formula.
2. Name two plants that are grown by vegetative propagation.
3. In the following food chain, plants provide 2000 J of energy to rats. How much energy will be available to hawks from snakes?
Plants Rats Snakes Hawks
4. What is the focal length of a plane mirror? Which mirror has larger field of view concave or convex? Where is this property of the mirror used?


5. State the meaning of biodiversity. List one advantage each of conserving forests and wild life.

6. List four problems caused by non biodegradable wastes.

7.
(a)Name the products obtained on complete combustion of hydrocarbons? How is the gas evolved during combustion tested in the laboratory? Explain in brief.
(b)Write the next higher homologue of :
(i) C3H6
(ii) C5H8

8. Name the gas liberated when ethanol reacts with Sodium metal? How do we get ethene from ethanol? Write chemical equation to justify your answer. State the role of acid in this reaction

9.
(a)Atomic number is considered to be a more appropriate parameter than atomic mass for classification of elements in modern periodic table. Why?
(b)How does metallic character of elements vary on moving from
(i) left to right in a period, and
(ii) from to bottom in a group in the modern periodic table Give reasons for your answer.

10. Four elements P, Q, R, S have atomic number 12, 13, 14 and 15 respectively. Answer the following questions giving reasons:
(i) What is the valency of Q?
(ii) Classify these elements as metals and non-metals
(iii) Which of these elements will form the most basic oxide?

11. What is reproduction? Explain two advantages of sexual reproduction over asexual reproduction.

12.
(a)What is fragmentation in organisms? Name a multicellular organism which reproduces by this method.
(b)How does regeneration take place? Why is this process not possible in all animals?

13.
(a)Fertilization is possible if ovulation has taken place during middle of menstrual cycle. Give reasons.
(b)List in tabular form two distinguishing features between a sperm and an ovum.

14. State and describe in brief any three main factors responsible for the rise of new species.

15. The image of a candle flame placed at a distance of 45 cm from a spherical lens is formed on a screen placed at a distance of 90 cm from the lens. Identify the type of lens and calculate its focal length. If the height of the flame is 2 cm, find the height of its image.

Here Im attaching PDF for Previous Year Board Exam Questions with Answers: