CBSE Class 7 Maths - Data Handling - NCERT EXERCISE 3.4 (#cbsenotes)

Data Handling

EXERCISE 3.4

CBSE Class 7 Maths

Q1: Tell whether the following is certain to happen, impossible can happen but not certain.
(i) You are older today than yesterday.
(ii) A tossed coin will land heads up.
(iii) A die when tossed shall land up with 8 on top.
(iv) The next traffic light seen will be green.
(v) Tomorrow will be a cloudy day.

Answer:
(i) It is certain to happen.
(ii) It can happen but not certain.
(iii)It is impossible.
(iv) It can happen but not certain.
(v)  It can happen but not certain.

CBSE Class 9 - English (Communicative) - Poetry - The Seven Ages - Summary (#cbseNotes)

The Seven Ages - Summary

Seven Ages Sculpture at Queen Victoria Street
credits: By Lonpicman (Own work)
[CC BY-SA 3.0 () or GFDL], via Wikimedia Commons

About The Poet:

William Shakespeare is viewed as the best author ever. He Paints a distinctive and clear impression of individuals. He gives a philosophical yet straightforward perspective of human life.

Summary:

The poem is a correlation nearby individual life with that to a drama.  Just like a man plays many parts in a melodrama, the man plays many parts as he progresses through different phases of his life. Like a movie or theatre play has entrances and exits thus life also bicker in life and death respectively. With their birth, men and women came to live and play competent extraordinary roles and flow away with death. The parts performed by them are generally seven.

CBSE Class 11 Chemistry -Syllabus (2017-18) (#cbsenotes)

Chemistry -Syllabus (2017-18)

CBSE Class 11 Chemistry

Here presents the prescribed syllabus for Class 11 Chemistry for the curriculum 2017-18.

CBSE Class 10 Chemistry - CH2 Acids and Bases - Very Short Questions and Answers (#cbsenotes)

Acids and Bases  

Very Short Questions and Answers

Class 10 Science - Chemistry

Q1: What is an acid?

Answer: Acid is a compound which yields hydrogen ions (H⁺) or Hydronium (H₃O⁺) ions , when dissolved in water.


Q2: What is the pH value of acids?

Answer: Less than 7 (i.e. 0 to < 7)


Q3: What is the taste of acids?

Answer: Sour


Q4: What happens to blue litmus paper when it comes in contact with acid solution?

Answer: It turns into red.


Q5: On the basis of origin, how acids are classified as?

Answer: Organic acids and Mineral acids.

CBSE Class 10/9/8 - English - Reading Comprehension (Set-8) (#cbsenotes)

Reading Comprehension

(NTSE 2015) Read the comprehension passage and answer the following questions:

Marie Curie was one of the most accomplished scientists in history. Together with her husband, Pierre, she discovered radium, an element widely used for treating cancer and studied uranium and other radioactive substances. Pierre and Marie’s amicable collaboration later helped to unlock the secrets of the atom.

Marie was born in 1867 in Warsaw, Poland, where her father was a professor of Physics. At an early age, she displayed a brilliant mind and blithe personality. Her great exuberance for learning prompted her to continue with her studies after high school. She became disgruntled, however, when she learned that the university in Warsaw was closed to women, Determined to receive a higher education, she defiantly left Poland and in 1891 entered the Sorbonne, a French university, where she earned her master’s degree and the doctorate in Physics.

CBSE Class 12 Chemistry - Syllabus (2017-18) (#cbsenotes)

Chemistry -Syllabus (2017-18)

CBSE Class 12 Chemistry

Here presents the prescribed syllabus for Class 12 Chemistry for the curriculum 2017-18.

CBSE Class 8/10 - Metals vs Non-Metals (Comparison) (#cbseNotes)

Metals vs Non-Metals

Physical Properties Comparison

Property	Metals	Non Metals
Physical State	Most metals are solids at room temperature except mercury which is a liquid. Gallium and Cesium also changes into liquid at slightly above room temperature.	Non Metals exist in all states. Eleven are gases, bromine is liquid while others are solids.
Melting and Boiling Point	Generally have high melting and boiling points. (Exceptions are Gallium, Mercury, Sodium and Potassium.)	Generally they have low melting and boiling points. Exceptions are: Carbon, Boron and Silicon.
Density	They have high density except Sodium and potassium.	Low denisty (Diamond is an exception.)
Lusture	Metals shine and are lustrous.	Non-metalls appear dull. (Exceptions are Diamond, graphite and iodine.)