There are___________fundamental units in SI system of units.

(a)

7

(b)

4

(c)

6

(d)

5

In a 100 m race, the winner takes 10 s to reach the finishing point. The average speed of the winner is ___________ ms^-1.

(a)

5

(b)

10

(c)

20

(d)

40

The centre of the sphere of which a spherical mirror is a part is called ______________________

(a)

pole

(b)

radius of curvature

(c)

focus

(d)

centre of curvature

The correct electronic configuration of potassium is

(a)

2,8,9

(b)

2,8,1

(c)

2,8,8,1

(d)

2,8,8,3

Which one of the following is a disaccharide?

(a)

Maltose

(b)

Starch

(c)

Chitin

(d)

Cellulose

____________ is an electronic device which stores data and information

(a)

Telescope

(b)

Television

(c)

Computer

(d)

Radio

Assertion (A) Electric current will not flow between two charged bodies when connected if their charges are same.
Reason (R) Current is the rate of flow of charge.

(a)

If both assertion and reason are true and reason is the correct explanation of assertion

(b)

If both assertion and reason are true but reason is not the correct explanation of assertion.

(c)

If assertion is true but reason is false

(d)

If assertion is false but reason is true.

Elements in the modern periodic table are arranged in__________ groups and __________ periods.

(a)

7,18

(b)

18,7

(c)

17,8

(d)

8, 17

Stomach of human beings mainly digests

(a)

carbohydrates

(b)

proteins

(c)

fat

(d)

sucrose

A Sonar device on a submarine send out a signal and receives an echo 5 seconds later. Calculate the speed of sound it water if the distance of the object from the submarine is 3500 m.

(a)

1440 ms^-1

(b)

1460 ms^-1

(c)

1400 ms^-1

(d)

1550 ms^-1

Which one of the following is an Italian species of honey bee?

(a)

Apis mellifera

(b)

Apis dorsata

(c)

Apis florae

(d)

Apis cerana

LINUX is a

(a)

Paid Software

(b)

Licensed Software

(c)

Free and Proprietary software

(d)

Free and Open source software

What is the full form of SI system?

Why are convex mirrors preferred to use rear view mirrors in vehicles?

Is air a pure substance or Mixture? Justify.

Name an element which has the same number of electrons in its first and second shell

Which fluid fills in the body cavity?

Name any two naturally occuring toxic substances in food.

Who is the father of modern computer?

What is plate meristem?

How will you measure the least count of vernier caliper?

How do we separate cream from milk?

What is meant by magnification? Write its expression. What is its sign for the image and virtual image?

Calculate the atomic number of an element whose mass number is 40 and number of neutron is 20. Also find the name of the element.

Explain the experiment to prove that chlorophyll is essential for photosynthesis.

How is the reproductive characters of mammals different from those of Aves?

What will be the final temperature if 1,68,000 J of heat is absorbed by 2 kg of water at 30°C?

Give the uses of magnets in everyday life.

What is Hardware and Software?

1. State any five features of modern periodic table.

2. Explain the components of phloem tissue

1. Explain the structure of kidney and the steps involved in the formation of urine

2. Name the instrument used to check the purity of milk. What is its principle? How does it work? where it is used?

1. What is the role played by the earthworms to improve the soil fertility? How does it adapt to light and temperature.

2. Give an account of classification of bacteria based on the shape.