CLASS X Chemistry:Carbon and Its compounds Worksheet

1 Name the process of converting vegetable oil to vegetable ghee
2. What are isomers? “Isomers of the first three members of alkane series are not possible”. Give reason to justify this statement and draw structures of two isomers of butane, three isomers of pentane

CBSE Class 7 Reproduction in Plants NCERT Solutions

1. Fill in the blanks:
(a) Production of new individual from the vegetative parts of parent is called vegetative propagation .
(b) A flower may have either male or female reproductive parts. Such flower is called unisexual flowers .

CLass 7 Waste Water Story NCERT Solutions

1. Fill in the blanks:
(a) Cleaning of water is process of removing contaminants .
(b) Wastewater released by houses is called sewage .
(c) Dried dung is used as manure.
(d) Drains get blocked by plastic and sludge .

Class 7 Science Transportation In Plants and Animals NCERT Solutions

NCERT Solutions for Transportation in Plants and Animals

Ans.2) (i) (b) (ii) (d) (iii) (a) (iv) (c)

CBSE Class 6 Algebric Expressions Worksheet

1.Write the equation for the following expressions
(a) x is multiplied by itself and then added to the product of x and y .
(b) Three times of p and two times of q are multiplied and then subtracted from r .
(c) Product of p , twice of q and thrice of r .
(d) Sum of the products of a and b , b and c and c and a.
(e) Perimeter of an equilateral triangle of side x.

Carbon and its compounds Important Questions and Answers

CBSE Class 10 Important Question and Answers of Carbon and Its compounds Sample paper 2017


1.A salt X is formed and a gas is evolved when ethanoi c acid reacts with sodium hydrogen carbonate. Name the salt X and the gas evolved. D escribe an activity and draw the diagram of the apparatus to prove that the evo lved gas is the one which you have named. Also, write chemical equation of the reaction involved.

CBSE Class 9 Science SA 2 Sample paper 2017

1. Name the Indian philosopher who proposed the theory of matter.

2. What is Dalton?

3. Define 1 watt of power.

4. Will advanced organisms be the same as complex orga nisms? Why?

5. Why are sound waves called mechanical waves?

6. List any three human activities which would lead to an increase in the carbon dioxide content of air.

Class 9 Science Sample paper 2017

1. Define atomicity.

2. What is an ion?

3. Define average power.

CBSE Class IX Science Sample paper SA 2 2017

1. What are polyatomic ions?

2. What is meant by the term chemical formula?

3. State the law of conservation of energy.

4. How would you choose between two characteristics to be used for developing a hierarchy in classification?

CBSE Class 9 Science SA 2 Sample paper 2017

1. Give one word for the following:

(i) Positively charged ion

(ii) A group of atoms carrying a charge

CBSE Class 9 Science Sample Paper 2017

1. Give an example of a tri-atomic molecule of an elem ent.

2. Valency of an element X is 3. Write the chemical fo rmula of its oxide.

3. What is negative work.

4. Why do we keep both snake and turtle in the same cl ass?

5. Why is sound wave called a longitudinal wave?

Science Sample Paper Class X Sample paper 2017

3. What are the values of (i) Angle of incidence and ( ii) Angle of reflection for normal incidence on a plane surface?

CBSE Class X Science Sample paper SA 2 2017

1. What is meant by water table?

2. Name the second member of alkynes family Give its s tructure?

3. What is the focal length of a lens, whose power is given as +2.0 D?

4. Why does it take some time to see objects in dim li ght when you enter the room from bright sunlight outside?

Class X Science SA 2 Sampe Paper

2. Name any two biodegradable pollutants.

3. Define soaps?

4. Why is water necessary for living organisms?

CBSE Class X Science SA 2 Sample paper 2017

CBSE Sample Paper-02

SUMMATIVE ASSESSMENT –II

SCIENCE (Theory)

Class – X

1. What is acid rain?

2. Name the product formed beside soap that is obtained during saponification process.

3. Are the laws of reflection applicable to plane surf aces also valid for curved surfaces?

CBSE Class 10 Science Sample Paper 2017

CBSE Sample Paper 2017

SUMMATIVE ASSESSMENT –II

SCIENCE (Theory)

Class – X

1 Name the process of converting vegetable oil to vegetable ghee.

2 List two secondary sexual characters of males that are different from that of females.

3 Write the main function of Ozone in the upper atmosphere

Mensuration Class 7 Worksheet

1.A wire is bent to form a square of side 22 cm. If the wire is rebent to form a circle, its radius is

Ratio and Proportion Class 6 Important Questions Worksheet

Practice exercise for Ratio and Proportion Class 6 Maths CBSE

Here is a worksheet for Class 6 MAths:Ratio and Proportion

1.Divide Rs 60 in the ratio 1 : 2 between Kirti and Kamal.
2.Length and breadth of a rectangular field are 50 m and 15 m respectively. Find the ratio of the length to the perimeter of the field

Atoms and Molecules Class 9 Worksheet

1.Give an example of a tri-atomic molecule of an elem ent.
2.Give one word for the following:
(i) Positively charged ion
(ii) A group of atoms carrying a charge
3.What are polyatomic ions? Give examples
4. State the Postulates of Dalton Theory?
5.What is the molecular formula for
i)Calcium hydroxide
ii)Magnesium Phosphate
iii)zinc Nitrate
iv)Aluminium oxide
v)Sodium Carbonate
vi)Aluminium chloride
5). 6.2.42g of copper gave 3.025 g of a black oxide of copper, 6. 4 9 g of a black oxide, on reduction with hydrogen, gave 5.192g of copper. Sho w that these figures are in accordance with law of constant proportion?

7.alculate the number of aluminium ions present in 0.051 g of aluminium oxide. ( Hint: The mass of an ion is the same as that of an atom o f the same element. Atomic mass of Al = 27 u)

8.What is the mass of:
(a) 0.2 mole of oxygen atoms?
(b) 0.5 mole of water molecules?
9.ive the names of the elements present in the f ollowing compounds.
(a) Quick lime
(b) Hydrogen bromide
(c) Baking powder
(d) Potassium sulphate.

10. Which has more number of atoms, 100 grams of so dium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?

11.alculate the formula unit masses of ZnO, Na₂ O, K ₂ CO ₃ , given atomic masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u.
12.State the differences betwee n an atom or a molecule.
13.Calculate the number of moles for the following:
a) 52 g of He
b) 17 g of water

Money and Credit CBSE Class 10 Important Question and Answers

1. Which is the main source of credit for urban househ olds?
Ans.Banks and Cooperatives

2. Name the agency from whom Arun took loan to meet he r expenses
Ans.Bank

Gulliver's Travels CBSE Class 9 SA 2 Important Question and Answers

Gulliver Travels Class 9 SA 2 Important Questions and Answers
Gulliver Travel's Study Material

Q1.A. Describe the notion of money which is prevalent in Gul liver’s country and which he explained to the master of Houyhnhnms

Ans. Gulliver told the master that when a man acquires a considerable amount of money, he can purchase the finest clothes, the best house, larg e areas of land, the most costly food and drinks. He can also have the choice of the most beauti ful woman. Besides, the rich men enjoyed the fruits of the poor man’s labour. During his conversation, the most amazing fact which Gulliver revealed to the master was that the n umber of poor people were far greater than the rich ones. The poor people were mostly beggars. They lived a hard life. Such a vast difference between the rich and the poor people was ca used by the power of money. Obviously, rich had made the poor people their slaves. This fact was really shocking for the master of Houyhnhnms.

Class 8 Mensuration Important Questions Worksheet

1.In a building there are 4 cylindrical pillars. T he radius of each pillar is 21 cm and height is 5 m. Find the curved surface area of four pillars.

Class 10 Probability Important Questions Worksheet

CBSE Class 10 Probability Important Questions Worksheet

1.A die is thrown once. Find the probability of getti ng:
(i) a prime number
(ii) a number lying between 2 and 6
(iii) an odd number

Area Related to Circles Class 10 Important Questions Worksheet

Important Questions Worksheet of Area Related to Circles

1.The radii of two circles are 19cm and 9cm respectiv ely. Find the radius of the circle which has its circumference equal to the sum of the circumference of the two circles

2.An umbrella has 8 ribs, which are equally spaced, a ssuming umbrella to be a flat circle of radius 45 cm. Find the area between two c onsecutive ribs of the umbrella.

Class 10 Coordinate Geometry Important Questions

Class 10 Coordinate Geometry Sample Paper Questions

Coordinate Geometry WorkSheet

Download CBSE Worksheet for Coordinate Geometry Class X


1.If A (4, 2), B (7, 6) and C (1, 4) are the vertices of a ABC ∆ and AD is in median, prove that the median AD divides AABC into two triangles of equal areas.

The Nationalist Movement in Indo China Class 10 Notes

Important Question and Answers History Class 10:The Nationalist movement in Indo china


1. Which one of the European trading company founded t he Port of FAIFO
Anst is the agency that develops standards for g oods and services.

2. Name the countries which comprise indo china?
Ans. Laos, Cambodia and Vietnam

How do Organisms Reproduce Class 10 Ncert Solutions

NCERT Solutions How do Organisms Reproduce

1.What is the importance of DNA copying in reprod uction?
Ans.DNA contains information for the inheritance of features from parents to next generation. DNA presents in nucleus of cells are th e information source for making protein. If information is different, different pro tein will be made that lead to altered body design.

2.Why is variation beneficial to the species but not necessarily for the individual?
Ans.Variations are useful for the survival of speci es in changed environment situations. If a population of reproducing organism were suited to a particular niche and if the niche is drastically altered the population could b e wiped out. However, some variations are present some species will survive. T hus, variation is useful to species but not the individual.

CBSE Class 10 Snake Summary and Study Material

Setting of the Poem Snake

This poem is set in the poet’s backyard, where there is a water-trough. When the poet goes to the trough to fill a pitcher with water for his own use, he encounters a snake which has come to the trough before him. The entire poem revolves around this very encounter.

Summary of Snake by D.H.Lawrence

The poem consists of 19 stanzas of variable lengths. The entire poem consists of 75 lines in total.
1^st stanza:

Class 10 English Virtually True Summary

The story starts with a boy named Michael who reads an article in the newspaper about a "Miracle Recovery." A boy whose condition was critical but stable had been recovered from coma. Michael recollects that the boy who was mentioned in the newspaper was in fact Sebastian Shultz who he had met weeks ago while playing. This all started in the Computer Fair, when Michael's father who was Nutty about computers, bought him a new computer preloaded with games. When he plays the game ‘Wild West’, he becomes a Sheriff and is challenged by "Black eyed Jed" to a duel. He meets a Second Sheriff whom he was asked to go with. Unfortunately, the Second Sheriff gets shot by the villains and the game ends. Later on, he gets a printout which read "I 'm Sebastian Shultz try playing Dragon Quest".

Political Parties CBSE Class 10 Important Questions

1. What is symbol of Samajwadi Party?
Ans.Cycle

2. Which is the oldest recognized political party of I ndia?
Ans.Indian National congress

3. How many political parties are recognized with the Election Commission?
Ans.750

Rime of Ancient Mariner CBSE Class 10 | Rime of Ancient Mariner Important notes

Three guys are on the way to a wedding celebration when an old sailor (the Mariner) stops one of them at the door (we'll call him the Wedding Guest). Using his hypnotic eyes to hold the attention of the Wedding Guest, he starts telling a story about a disastrous journey he took. The Wedding Guest really wants to go party, but he can't pry himself away from this grizzled old mariner. The Mariner begins his story. They left port, and the ship sailed down near Antarctica to get away from a bad storm, but then they get caught in a dangerous, foggy ice field. An albatross shows up to steer them through the fog and provide good winds, but then the Mariner decides to shoot it. Oops.

Ozymandias CBSE Class 10 Summar | Ozymandias Important notes

I met a traveller from an antique land
Who said...

    The poem begins immediately with an encounter between the speaker and a traveler that comes from an "antique land."
    We're not sure about this traveler. He could be a native of this "antique" land, or just a tourist returning from his latest trip.

Market Around Us CBSE Class 7 Important Notes

Important notes of Civics Class 7

Market around us important notes.

Weekly market;
1.It is held on a specific day of the week
2.They do not have permanent shops
3.Traders set up shops for the day and close them in the evening
4.There are thousands of weekly markets in India

Diversity in Living Organisms Class 9 Solutions

Important question and answers of diversity in living organisms Class 9

CBSE Class 9 Science Biology Diversity in living organisms question and answers

1.In what respects are lichens unusual plants?
Ans. lichen is a close partnership between an alga and a fungus. The algal cells grow in the fungal mycelium. Alga make food by photosynt hesis. The fungus provides shelter and protection to the alga. Thus, both the alga and the fungus benefit. This kind of association is called a symbiotic asso ciation.

2.Na me two coelenterates with diagrams. How do porifera n animals differ from coelenterate animals?
Ans.Examples of coelenterates. Poriferans are the simplest multicellular and branched. The cells are loosely held together and do not form tissue Coelenterates have one continuous central cavity called coelentron.

Globalisation and indian Economy CBSE Class 10 Solutions

 Globalisation and Indian Economy CBSE Class 10 Important Question and Answers

Solution for Social Science Class 10 CBSE Globalisation


1.In what three ways has liberalization of trade and investment policies helped the globalisation process?
Ans.A. With liberalization of trade, industrialists are al lowed to make decisions freely about what they wish to import and export.
B. Goods now be imported and exported easily.
C. Companies can set their manufacturing units any oth er country of the world.
D. The process of foreign trade and investment has bee n increased by the MNCs.
E. Domestic companies are free to compete with produce rs around the world.

Our Environment CBSE Class 10 Important Question and Answers

1.Why is there a need to b an the use of poly then e bags?
Ans.Polythene bags are non- biodegradable, the y are not decomposed by micro- organisms hence, cause land pollution.

2.What are the two functions of ecosystem?
Ans.Interactions of any ecosystem refers to it s functions these interactions are-
(A) Biogeochemical cycles- The cyclic transfers between the living and non- living components.
(B) Flow of energy- in a food chain, through various st eps of eating and being eaten food energy flow from one tropic level t o another.

Rearranging the Jumbled Words Exercise

1.Rearrange the following jumbled words to form meaningf ul sentences.
(a) through the atmosphere /of the sun /the /are scatt ered as /rays /they / travel
(b) the sun /overhead /is /when /rays /the verticall y /travel
(c) yellow colour /scattered /the /is /more so /appears /overhead /yellow / the sun

Three Men in a Boat CBSE Class 9 Important Question and Answers

 Three Men in a Boat CBSE Class 9 Important Question and Answers 
SA 2

Q1. Justify the title ‘Three Men in a Boat’.
Ans. The title is apt for the novel ‘Three Men in a Boat’ . The entire theme of the novel, “Three Men in a Boat” is based on the river journey. This jour ney is undertaken by the narrator and his two friends, George and Harris. They make the ir journey on a boat in River Thames. Their journey is for two weeks and almost all the important places located on the banks of the river Thames is visited. During the ir journey, they cook and sleep in their boat. We can say that for at least a fortnight, the boat became their home. They have absolutely no complaint with regard to the homely c omforts which they may not get in the boat. Their journey starts from Kingston and ends at Oxford. During their journey, the narrator and his friends enjoy every momen t in the river. During their stay at night, they visit the local places and enjoy life. Therefore, it can be said that narrator has selected appropriate title for the present novel, “Three Men in a Boat”.