Thursday, August 21, 2014

CBSE Class 8 - Science - Ch 13 - Sound (MCQs)


CBSE Class 8 - Science - Ch 13 - Sound (MCQs)

Q1: In dholak sound is produced due to ...

(a) stretched membrane
(b) stretched strings
(c) air column
(d) vibration of air

Q2:The pitch of sound depends on the __________ of the vibrating body.

(a) amplitude
(b) noise
(c) frequency
(d) medium of propagation

Q3: Speed of sound in solids is ______ the speed of sound in liquids.

(a) same as
(b) greater than
(c) less than
(d) sometimes greater and sometimes less than

Q4: The human ear can hear sounds having frequency in range ...

(a) between 200 - 20,000 Hz
(b) between 20 - 2000 Hz
(c) between 200 - 2000 Hz
(d) between 20 - 20,000 Hz

Q5: The time taken to complete ___ oscillation(s) is called time period.

Wednesday, August 20, 2014

CBSE Class 8/9/10/11/12 CTET - English Grammar - Reading Comprehension

Reading Comprehension

Directions: Read the following short passages. After each passage, you will find several questions based on what is stated or implied in the passages. Answer the questions that follow each passage.

 Passage -1 
Vehicles do not move about the roads for mysterious reasons of their Own. They move only because people want them to move in connection with the activities which the people are engaged in. Traffic is therefore a ‘function of activities’, and because, in towns, activities mainly take place in buildings, traffic in towns is a ‘function of buildings’, The implications of this line of reasoning are inescapable.

Q1: Line 1 of the passage means that vehicles move on the roads

(a) for reasons difficult to understand.
(b) to serve specific purposes of people.
(c) in a haphazard fashion.
(d) in ways beyond our control.

Q2: The author says that traffic is a ‘function of  activities’. He means that

(a) human activities are taking place.
(b) human activities are dependent on traffic.
(c) traffic is not dependent on human activities.
(d) traffic is connected with human activities.

Q3: The author suggests by his argument that

Tuesday, August 19, 2014

CBSE Class 7 - Geography - CH2 - Inside Our Earth

Inside Our Earth

(Q & A)
CBSE Class 7 - Geography - CH2 - Inside Our Earth

Q1: What are the three layers of the earth?

Answer: The three layers of the earth are: crust, mantle and core.

Q2(MCQ): The innermost layer of the earth is

(a) Crust
(b) Core
(c) Mantle

Answer: (b) Core

Q3: How deep one has to dig to reach the centre of the earth?

Answer: 6000 km (appox.)

Q4: What is crust?

Answer: The uppermost layer over the earth’s surface is called the crust.

Q5: What is the depth of the crust?

Answer: Crust is about 35km deep on the continental masses and only 5km on the ocean floors.

Friday, August 15, 2014

CBSE Class 9 - Economics: People as Resource (Questions and Answers)

People as Resource

Q & A for CBSE Examination

Q1: What is human capital?

Answer: Human capital is the stock of skill and productive knowledge embodied in them.

Q2: What is 'People as Resource'? 

Answer: 'People as Resource' is a way of referring of a country’s working people in terms of their existing productive skills and abilities.

Q3: Which aspect of a large population has often be ignored or overlooked?

Answer: The positive aspect of large population i.e. it can be considered as resource is often overlooked.

Q5: How human capital contributes to Gross National Product by citing two examples?

  1. Green Revolution in India proved that with increase in human capital led to improvement in production technology. Due to this the productivity of scarce land resources increased considerably.
  2. The tremendous growth of Information technology industry proved the importance of human capital for the development of IT and ITeS services.

Q6: How is the investment in human resource is similar to any other type of investment?

Tuesday, August 12, 2014

CBSE Class 9 - CH 4.2 Linear equations in two variables (NCERT Ex 4.2)

Linear Equations in Two Variables

Exercise 4.2

Q1: Which one of the following options is true, and why?

     y = 3x + 5 has

(i) a unique solution, (ii) only two solutions, (iii) infinitely many solutions


y = 3x + 5 is a linear equation in two variables and it has infinite possible solutions. As for every value of
x, there will be a value of y satisfying the above equation and vice-versa.

Hence, the correct answer is (iii).

Q2: Write four solutions for each of the following equations:

(i) 2x + y = 7 (ii) ∏x + y = 9 (iii) x = 4y

Sunday, August 3, 2014

CBSE Class 9 - Geography - Physical Features of India (Short Questions and Answers)

Physical Features of India
Q & A

Physiographic divisions

Q1: Discuss the geological structure of India.

Answer: Geological structure of India:

  1. India is part of ancient continent called Gondwanaland which is divided into many plates. One such Indo-Australian plate moved towards the north and collided with Euro-asian plate and thus resulted in rising to the present day Himalayas. 
  2. To the south of Himalayas a basin was formed. It was filled with alluvium brought by the rivers and thus forming North Indian plains.
  3. During Himalayas formation, two major events affected the plateau. An extensive volcanic eruption took place in the north-west part of the plateau.
  4. The western part subsided and the Indian Ocean advanced and occupied the depression. It led to the rise to the Bay of Bengal and the Arabian sea.

Q2: Describe the physiographic divisions or physical features of India.

Answer: Physiographic division of India is:
  1. The Himalayan Mountains: Geologically young and fold mountains stretch over the northern borders of India. These are the one of the most rugged mountain barriers of the world.
  2. The Northern Plain: It is about 2400km long and 240-320km wide. Formed by interplay of three major river systems - the Indus, the Ganga and the Brahamputra. It is rich in fertile alluvial soil.
  3. The Peninsular Plateau: The tableland composed of old crystalline igenous and metamorphic rocks. It is abundant with shallow valleys and rounded hills.
  4. The Indian Desert: It lies towards the western margins of the Aravalli Hills and has arid climate with low vegetation cover.
  5. The Coastal Plains: These plains are stretched along the eastern and the western edges of the peninsular plateau.
  6. The Islands: Two island groups - The Lakshadweep Islands and the Andaman and Nicobar Islands.

Q3: Write three important features of Aravalli Hills.

Saturday, August 2, 2014

CBSE Class 9 - Science - CH1 Matter In Our Surroundings (Question Bank)

Matter In Our Surroundings

Questions asked in CBSE Examination

Very Short Answer Type (1 Mark)

Q1: Expand CNG and LPG.

Q2: Which will have more impact on kinetic energy; doubling mass or doubling velocity?

Q3: Arrange the following substances in increasing order of force of attraction between the particles.
       (i) milk (ii) salt (iii) oxygen

Q4: Why is sponge a solid though compressible?

Q5: Write one important characteristic of matter.

Q6: Why does a desert cooler cool better in a hot dry day?

Q7: Convert:
(a) 25°C into kelvin scale
(b) 500 K into celsius scale

Q8: Why does the smell of hot sizzling food reach you several metres away but to get the smell
from cold food you have to go close?

Q9: What is the term used for change of solid state to liquid state? 

Q10: Name the temperature at which solid and liquid states of matter can coexist.

Q11: Define evaporation.