Free Printable Science Class 10

1.

A beam of light is incident through the holes on side A and emerges out of the holes on the other face of the box as shown in the Figure. Which of the following could be inside the box?

a)

Concave Lens

b)

Rectangular Glass Slab

c)

Prism

d)

Convex Lens

2.

Rays from Sun converge at a point 15 cm in front of a concave mirror. Where should an object be placed so that size of its image is equal to the size of the object?

a)

15 cm in front of the mirror

b)

30 cm in front of the mirror

c)

between 15 cm and 30 cm in front of the mirror

d)

more than 30 cm in front of the mirror

3.

Beams of light are incident through holes A and B and emerge out of the box through holes C and D respectively as shown in Figure. Which of the following could be inside the box?

a)

Rectangular Glass Slab

b)

A Convex Lens

c)

A Concave Lens

d)

A Prism

4.

True or False-

Bi-convex and Plano concave mirrors are exceptions to refraction of light

a)

True

b)

False

5.

The figure shows a ray of light as it travels from medium A to medium B. Refractive index of medium B relative to medium A is

Hint-Apply $\frac{\sin i}{\sin r}$

$\sin45\degree=\frac{1}{\sqrt[]{2}}$

$\sin30\degree=\frac{1}{2}$

$\sin60\degree=\frac{\sqrt[]{3}}{2}$

a)

$\sqrt[]{\frac{3}{2}}$

b)

$\sqrt[]{\frac{2}{3}}$

c)

$\frac{1}{\sqrt[]{2}}$

d)

$\sqrt[]{2}$

6.

In torches, search lights and headlights of vehicles the bulb is placed

a)

b/w p and f of the reflector

b)

very near to the focus of the reflector

c)

b/w f and C of the reflector

d)

at C

7.

Three beakers labelled as A, B and C each containing 25 mL of water were taken. A small amount of NaOH, anhydrous CuSO4 and NaCl were added to the beakers A, B and C respectively. It was observed that there was an increase in the temperature of the solutions contained in beakers A and B, whereas in case of beaker C, the temperature of the solution falls. Which one of the following statement(s) is(are) correct?

(i) An exothermic process has occurred in beakers A and B.

(ii) An endothermic process has occurred in beakers A and B.

(iii) In beaker C exothermic process has occurred.

(iv) In beaker C endothermic process has occurred.

a)

only i

b)

only ii

c)

i and iv

d)

ii and iii

8.

Which of the following gases can be used for the storage of fresh samples of an oil for a long time?

a)

carbon dioxide or oxygen

b)

nitrogen or oxygen

c)

carbon dioxide or helium

d)

Helium or nitrogen

9.

What happens when a solution of an acid is mixed with a solution of a base in a test tube?

(i) The temperature of the solution increases

(ii) The temperature of the solution decreases

(iii) The temperature of the solution remains the same

(iv) Salt formation takes place

a)

only i

b)

i and iii

c)

ii and iii

d)

i and iv

10.

During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to

a)

absorb the evolved gas

b)

moisten the gas

c)

absorb moisture from the gas

d)

absorb $Cl^-$ ions from the evolved gas

11.

Which of the following salts does not contain water of crystallisation?

a)

Blue Vitriol

b)

Baking Soda

c)

Washing Soda

d)

Gypsum

12.

Dayaan and Hriday go for a trek in dense forests. Hriday touches a plant "A" after which, he gets a burning sensation. Dayaan brings a leaf of a plant "B" which grows near it. Ruhaan and Parth are wondering what are plants A and B. Niva and Subhan answer to it by saying

a)

A is dock plant

B is nettle plant

b)

A is nettle plant

B is dock plant

c)

A is nettle plant

B is sporangium plant

d)

A is dock plant

B is Neem

13.

Hriday and Ruhaan conduct an experiment in which sodium hydrogen carbonate is added to acetic acid. Niva and Dayaan are arguing about the characteristics of the evolved gas-

(i) It turns lime water milky

(ii) It extinguishes a burning splinter

(iii) It dissolves in a solution of sodium hydroxide

(iv) It has a pungent odour

Choose the correct one

a)

i and ii

b)

i,ii and iii

c)

ii,iii and iv

d)

i and iv

14.

Rahul is having tooth decay. The dentist says this is a result of eating too many chocolates and sweets. Eating these had caused his mouths pH to fall below -

a)

4.7

b)

5.2

c)

7

d)

none of the above

15.

Which of the following is not a mineral acid?

a)

(a) Hydrochloric acid

b)

(b) Citric acid

c)

(c) Sulphuric acid

d)

(d) Nitric acid

16.

Dayaan is solving a maths problem on the blackboard. Niva isn't able to see what Dayaan is writing when seated at a far distance from the blackboard. State the possible cause-

a)

Astigmatism in the eye

b)

Corneal defect

c)

Myopia

d)

Dayaan is writing in a small font size

17.

Find the charge passing through a conductor per second if the current is recorded to be $1\mu$ A

a)

$10^{-4\ }C$

b)

$10^{-3}C$

c)

$10^{-5}C$

d)

$10^{-6}C$

18.

A given length of wire is doubled on itself and this process is repeated once again. By what factor does the resistance of the wire change?

Hint-Use R= $\frac{\int_{ }^{ }l}{A}$

a)

$\frac{R}{4}$

b)

$\frac{R}{8}$

c)

$\frac{R}{16}$

d)

Data insufficient

19.

The equivalent resistance b/w P and Q is

a)

$7\Omega$

b)

$2\Omega$

c)

$1\Omega$

d)

$\frac{5}{3}\Omega$

20.

The given figure shows 3 different wires that are made up of the same metal. In which wire, will the resistance be the highest?

a)

1

b)

2

c)

3

d)

Same for all

21.

The diagram above is a schematic diagram of a household circuit. The house shown in the above diagram has 5 usable spaces where electrical connections are made. For this house, the mains have a voltage of 220 V and the net current coming from the mains is 22A

What is the mode of connection to all the spaces in the house from the mains?

a)

Series

b)

Parallel

c)

Combination of series and parallel

d)

None of the above

22.

The diagram above is a schematic diagram of a household circuit. The house shown in the above diagram has 5 usable spaces where electrical connections are made. For this house, the mains have a voltage of 220 V and the net current coming from the mains is 22A.

Spaces 5 and 4 have the same resistance and spaces 3 and 2 have respective resistances of 20Ω and 30Ω. Space 1 has a resistance double that of space 5. What is the net resistance for space 5?

a)

$50\Omega$

b)

$150\Omega$

c)

$300\Omega$

d)

$60\Omega$

23.

Assertion-Myopia is that defect of the human eye under which a person is unable to see far-off objects clearly

Reason-The eyeball is elongated

a)

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

b)

Both A and R are true but R is not the correct explanation of A

c)

A is true but R is false

d)

A is false but R is true

24.

Assertion-Hypermetropia is that defect of human eye under which only far off objects are visible

Reason-Hypermetropia is corrected using a converging lens

a)

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

b)

Both A and R are true but R is not the correct explanation of A

c)

A is true but R is false

d)

A is false but R is true

25.

Assertion-Myopia is caused due to increased converging power of eye lens

Reason-Myopia is corrected using spectacles of concave lens of suitable power

a)

Both A and R are true and R is correct explanation of A

b)

Both A and R are true but R is not correct explanation of A

c)

A is true but R is false

d)

A is false but R is true

26.

Assertion-Light from a distant object arriving at the eye lens may get converged at a point in front of the retina

Reason-The eye is producing too much divergence in the incident beam

a)

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

b)

Both A and R are true but R is not the correct explanation of A

c)

A is true but R is false

d)

A is false but R is true

27.

Statement-Gradual Weakening of ciliary muscle causes astigmatism

a)

True

b)

False

28.

Assertion-A hypermetropic person prefers to remove his spectacles while driving

Reason: When a hypermetropic person wearing spectacles looks at a distant object, the parallel rays from the distant object converge in front of the retina, making the image blurred.

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

29.

Hriday and Dayaan are arguing about process X which is a process of obtaining metals from their ores. This process takes place in the presence of excess of oxygen and strong heating of the metallic ore. What could be process X?

a)

Calcination

b)

Roasting

c)

Chlor Alkali

d)

None of the above

30.

Two wires A and B are of equal lengths and equal resistance. If resistivity of A is more than B then which of the two is thicker?

a)

A is thicker

b)

B is thicker

c)

Both are equal, material change has caused his difference

d)

None of the above

Science Class 10

Total questions: 30

Worksheet time: 3hrs 40mins

Similar Resources on Wayground