CBSE Class 9 - Science - CH12 - Sound (Q and A)

SOUND

(Q & A)

Q1: What is Sound? Why it is important for us?

Answer: Sound is a longitudinal mechanical wave. Sound has great importance in our daily life. It gives us a sensation of hearing. It makes possible to communicate with other persons through speech.


Q2: What is a mechanical wave?

Answer: A mechanical wave is a disturbance that moves through a medium when the particles of the medium set neighbouring particles into motion. The particles vibrating in turn do not move forward but the disturbance is carried forward.

Class 9 - Eng (C) - INTEGRATIVE GRAMMAR PRACTICE 5 (workbook)

INTEGRATIVE GRAMMAR PRACTICE 5

Q1: Look at the notes below. Then use the information to complete the paragraph by choosing a suitable word or phrase in each space.

Bishnois - always - nature worshippers - 1730 A.D. - Maharja Abhay Singh's men - fell - khejri trees - Amrita Devi - hug a tree - protested - insisted - to cut her head first - men obliged - Amrita - a legend.

Bishnois have (a) _______________________________________. In 1730 A.D. Maharaja
Abhay Singh's (b) _______________ fell Khajri trees. Amrita Devi, a true Bishnoi,
(c) __________ and expressed (d) _________________________. She insisted that if they
wanted to cut the tree (e) _______________first. The unrelenting men of the Maharaja
obliged her and the (f) _________________________.

Answer:
(a) (i) always been regarded as nature worshippers ✓
     (ii) always been called as nature worshippers
    (iii) always knew nature worshippers
    (iv) always done nature worshippers

Diversity in Living Organisms (MCQs) - Biology - CBSE - Class 9

Diversity in Living Organisms 

(MCQs)

Q1(CBSE 2010): Chloroplast in Spirogyra is:

(a) spirally arranged and ribbon shaped with pyrenoids
(b) spirally arranged without pyrenoids
(c) circular
(d) cup-shaped

Q2(CBSE 2010): Needle shaped structure in Pinus plant is:

(a) leaf
(b) shoot
(c) stem
(d) reproductive part

CBSE Class 10 - English (C) - Integrated Grammar Practice 6

Integrated Grammar Practice 6

Q1: The following paragraph has not been edited. There is an error in each of the lines indicated. Underline the error and write your correction in the space provided as shown.


Answer:

	Error	Correction
Economics, is nothing but a way to solving problems of	to	for
allocation of resources. Human want are graded in nature.	want	wants
This means that a poor person will be more concern about	concern	concerned
procurement of food for his surviving rather than buying a	surviving	survival
luxury car. It is only after meet this requirement that his	meet	meeting
need for other things should arise. The Government must	should	would
outline its country specific solution to the same problems,	solution	solutions
that is, allocate of resources . There are three essential	allocate	allocation
problems, namely what to produced, how to produce and	produced	produce
for whom to produce.

CBSE Class 10 - Maths - Applications of Trigonometry (MCQs)

Applications of Trigonometry 

Land Surveyor using Theodolite

(MCQs)


Q1: When a point is observed, the angle formed by the line of sight with the horizontal level where the point being viewed is above the horizontal plane is known as:

(a) angle of triangle
(b) angle of depression
(c) angle of elevation
(d) none of these


Q2: When we raise our hand to look at the object, the angle formed by the line of sight with
horizontal is known as:

(a) obtuse angle
(b) angle of elevation
(c) angle of depression
(d) acute angle

CBSE Class 9 - Value Based Questions (Social Studies- SA-2)

Value Based Questions and Answers

In SA-II examination, there shall be 1 or 2 value based questions of 3-5 marks.

Here follows Value based Questions in Social Science:


Q1(CBSE Sample Paper): While analysisng the given table, which values you think are distrubing the balance of the country?

   (a) Gender Ratio (Female - Male) 46% : 54%
   (b) Occupation (Secondary - Primary) 55% : 35%

Answer:
(a) Gender Ratio: Female-Male ratio as 46%:54% is a matter of grave concern for the country.

1. It indicates how the girl child is neglected.
2. female foeticide, poor medical care and poor nutrition to girl child are the possible causes for low female ratio.
3. Society's gender bias towards girl has led to this difference and it will lead to dire consequences.

CBSE Class 10 - Biology - Heredity and Evolution (MCQs)

Heredity and Evolution

(MCQs)

Q1: Which type of variation is inherited?

(a) Somatic Variation
(b) Germinal Variation
(c) Both Somatic and Germinal
(d) None of these


Q2: The organs which perform different functions but have the same basic structure are called:

(a) Vestigial organ
(b) Analogous organs
(c) Homologous organs
(d) Analytic organs

CBSE Class 9 - History - CH8 - Clothing: A Social History

Clothing: A Social History

Indian Woman
credits:classroomclipart

MCQs

Q1: In medieval France, the royalty could wear expensive clothes like:

(a) silk
(b) ermine
(c) velvet
(d) all of these

Q2: During French revolution, which colours became popular in French clothing:

(a) Red and Black
(b) Blue, White and Red
(c) Black
(d) Red, Yellow and Blue

Q3: Sumptuary Laws in medieval Europe were meant

(a) to allow hunting game in certain areas
(b) to protect home production against imports
(c) to define what the rich and poor could wear
(d) All of these

CBSE Class 7 - Science - Ch 17 - Forests: Our Lifeline

Forests: Our Lifeline

NCERT Chapter Solution

Q1: Explain how animals dwelling in the forest help it grow and regenerate.

Answer: Various types of animals (herbivores, carnivores, omnivores) live in forests and contribute to food chain. Following animal activities show how animals help forest grow and regenerate.

1. Animals help in dispersal of seeds and pollination of flowers.
2. Animals excreta and their dead bodies when mixed win soil act as manure for the plants.
3. Micro organisms convert dead plants and leaves into humus which is rich in nutrients. Humus in soil provide necessary minerals for plant growth.

Q2:  Explain how forests prevent floods.

CBSE Class 11- PSA Study Material by Delhi NCT Govt. Teachers

Class 11 -PSA Sample Paper

Following is study material for PSA test, compiled by Delhi NCR Govt. teachers. You may download 280 page pdf from this link.