# Sample Paper Class 10 Science Term 2 Set E

Please refer to Sample Paper Class 10 Science Term 2 Set E with solutions provided below. We have provided CBSE Sample Papers for Class 10 Science as per the latest paper pattern and examination guidelines for Standard 10 Science issued by CBSE for the current academic year. The below provided Sample Guess paper will help you to practice and understand what type of questions can be expected in the Class 10 Science exam.

## CBSE Sample Paper Class 10 Science for Term 2 Set E

Section – A

I. Case Study Questions.

1. Ohm’s law gives the relationship between current flowing through a conductor with potential difference across it provided the physical conditions and temperature remains constant. The electric current flowing in a circuit can be measured by an ammeter.
Potential difference is measured by voltmeter connected in parallel to the battery or cell. Resistances can reduce current in the circuit. A variable resistor or rheostat is used to vary the current in the circuit.

(i) What type of conductor is represented by the following graph?

Ans. (i) Ohmic conductor like copper

(ii) What type of conductors are represented by the following graph?

Ans. (ii) Non-ohmic conductor like metal filament

(iii) What is the slope of graph in (i) equal to?
Ans. (iii) Resistance

Section – B

II. Very Short Answer Type Questions :

2. Name the part of stamen where pollen is produced.
Ans. Anther.

3. What will happen when magnet is freely suspended?
Ans. It will always align towards north south-direction.

4. Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?
Ans. Energy consumed by 250 W TV in 1 h = 250 × 1 = 250 W h Energy consumed by 1200 W toaster in 10 minutes = 1200 X 10/60 = 200 W h
Here total energy consumed by the TV is more than toaster.

Section – C

III. Short Answer Type Questions :

5. (i) How many covalent bonds are present in ethane?
(ii) Write structural formula of cyclic hydrocarbon (saturated) contain six carbon atoms .
Ans. (i) There are 7 covalent bonds in ethane,

6. (i) Name the part of Bryophyllum where buds are produced for vegetative propagation.
(ii) Name the method by which hydra reproduces. Is this method sexual or asexual?
Ans. (i) Leaf notches of Bryophylum are involved in vegetative propagation.
(ii) Hydra reproduce by Budding. It is an asexual reproduction.

7. Sex determination in man depends upon 23rd pair of chromosomes, called the sex chromosomes. If it were a homologous pair-XX, it would be a female. If it were a heterologous pair – XY, it would be a male.
Based on this statement, answer these questions:
(i) How many types of eggs/ova and how many type of sperms female and male human being will produce respectively ?
(ii) Which parent’s contribution of sex chromosomes determines sex of the child?
Ans. (i) Male produces two genetic types of sperms, half with X and other half with Y chromosome. The female produces only one genetic type of ova, all carrying X chromosome.
(ii) Sex of children will be determined by what they inherit from their father, and not from their mother.

8. State the rule which determines the direction of force experienced by a current carrying straight conductor placed in perpendicular magnetic field.
Ans. Fleming’s Left hand Rule.
It states that ‘if we stretch the left hand such that all the three are at 90° (perpendicular) to each other) then the thumb represents the direction of force, middle finger represents magnetic field and index finger gives direction of current.

9 In the given food chain if the amount of energy at fourth trophic level is 4 kJ, what will be the energy available to that of first second and third trophic level?
Ans. First trophic level will have 4000 kJ.
Second trophic level will have 4000 X 10/100 = 400 kJ
Third trophic level will have 400 X 10/100 = 40 kJ
Fourth trophic level will have 40 X 10/100 = 4 kJ

Section – D

IV. Short Answer Type Questions :

10. (i) Write general formula of alkyne homologous series.
(ii) Draw electron dot diagram of N2.
(iii) Why diamond is a poor conductor of electricity?
Ans. (i) CnH2n–2 is general formula of alkynes.

It has triple bond
(iii) Diamond does not have free electrons because each carbon atom forms covalent bonds with other four carbon atoms.

11. (i) What is food web?
(ii) Why is it necessary to manage our garbage?
(iii) How is ozone formed in stratosphere?
Ans. (a) The interconnection of food chains form a food web.
(ii) Healthy living needs clean surroundings. Hence, it is essential to manage our garbage properly so as to avoid communicable disease.
(iii) Ozone is formed from oxygen in stratosphere with the help of U.V. light 3O2(g) UV ⇌ 2O3 (g)

12. (i) Give four differences between self pollination and cross pollination.
(ii) Why is temperature of scrotal sac 2°C less than the body temperature?
Ans. (i)

(ii) Scrotal sac temperature is less by 2° because sperms are safe at a little lower temperature than body temperature. It is outside the body that is why it has lower temperature than body.

Section – E

V. Long Answer Type Questions :

13. (i) How does metallic character vary down the group?
(ii) Name two elements which belong to first period of periodic table.
(iii) How many elements are present in 4th period of periodic table.
(iv) How does reactivity vary down the group 17?
(v) Out of Li, K, Na which one is most reactive and why?

OR

An element ‘X’ has atomic number 12 and ‘Y’ has atomic number 17.
(i) Write the electronic configuration of X and Y.
(i) To which groups ‘X’ and ’Y’ belong?
(ii) What is the valency of ‘X’ and ‘Y’?
(iv) Out of ‘X’ and ‘Y’ which one is metal and when one is non-metal?
(v) Which is larger in size among ‘X’ and ‘Y’?
Ans. (i) Metallic character increases down the group.
(ii) Hydrogen, Helium.
(iii) 18 elements are present in 4th period.
(iv) Reactivity goes on decreasing down the group 17.
(v) K is most reactive due to larger atomic size, least effective nuclear charge, it can lose electron easily.

OR

(i) ‘X’ 2, 8, 2 ‘Y’ 2, 8, 7
(ii) ‘X’ belongs to group 2, ‘Y’ belongs to group 17
(iii) ‘X’ has valency equal to 2 ‘Y’ has valency equal to 1
(iv) ‘X’ is metal ‘Y’ is non-metal
(v) ‘X’ is larger in size.

14. (i) What is meant by solenoid? How does a current carrying solenoid behave? Give its main use.
(ii) For the circular coil carrying current shown below draw magnetic field lines. Decide which of its face behaves as north pole and which face behaves as south pole. Give reason to justify your answer.

Ans. (i) Solenoid is a long coil of many circular turns of insulated copper wire wound on cylindrical soft iron or steel core.
When current is flowing through a solenoid, the magnetic field lines resemble exactly with a bar magnet with fixed polarity. It behaves as a bar magnet.
(ii) Front face behaves like a north pole as field emerges out of it. Rear face behaves as south pole as field enters into this face.

15. (i) Draw a neat and labelled diagram of female reproductive systems and describe its parts.
(ii) Differentiate between asexual and sexual reproduction giving four differences.

OR

(i) Draw well labelled diagram of male reproductive system and describe its parts.
(ii) What is need of population control? Give four reasons.
Ans. (i) (a) A pair of ovaries: Ovaries produces ova and female sex hormones. One egg is produced every month by one of the ovaries. Ova are picked up by the funnel shaped fallopian tubes.
(b) Fallopian tube: There are two fallopian tube, which carry ova from ovary to the uterus.
Fertilisation occurs in fallopian tube.
(c) Uterus: Pear shaped hollow muscular organ. Fertilized ovum remains attached to the uterus wall.
(d) Vagina: It is a narrow muscular tube. Its upper end is connected to cervix of the uterus and lower end opens outside through an opening. It is the place for copulation.

(ii)

OR

(i) (a) A pair of testis: Each testis produces sperms and male sex hormone,called testosterone. Testis are present in small pouch called scrotum.
(b) Epididymis: It is long coiled tube whose head is connected with testis and tail with Vas deferens.
(c) Vas deferens: It is long tube carrying sperms from testis to the urethra.
(d) Urethra: It receive the Vas deferens from both the testis. It opens outside the penis. It carries both sperms and urine.

(ii) Over population leads to large number of problems given below:
(a) Unemployment: India has large population, therefore, unemployment is increasing every year.
(b) Poverty: Large population lead to poverty due to low income.
(c) Food supply: Food production may not increase at the same rate as population.
(d) Hygienic condition: More people live in small area generally, leads to unhygienic condition which leads to diseases and health issues.

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