Blog provides NCERT solutions, CBSE, NTSE, Olympiad study material, model test papers, important Questions and Answers asked in CBSE examinations. References to Educational Sites and resources.
Wednesday 1 August 2012
CBSE Class 9 - Science - CH9 - Force and Laws of Motion (worksheet)
Isaac Newton |
Force and Laws of Motion
Worksheet
Fill in the blanks
1. The study of motion of a body under the action of a force is called ______.
2. (Impulse/Force/Pressure) ______ is a push or pull acting upon an object.
3. The natural tendency of objects to resist a change in their state of rest or of uniform motion is called ______.
Tuesday 31 July 2012
CBSE Class 9 - Science - CH6 - Tissues (Worksheet)
Fill in the blanks
1. ___________ is the process by which unspecialised structures become modified and specialised for performing specific functions.
2. Differentiation results in ________ (division/ summation/integration) of labour.
3. The study of the structure of tissues and organs is known as ______ .
4. Based on ability to divide, plant tissues may be classified as ________ and _____ tissues.
Sunday 29 July 2012
CBSE Class 11: Chemistry - CH1 - Laws of Chemical Combinations #chemistry #eduvictors
Antoine Lavoisier credits:wikipedia |
Laws of Chemical Combinations
Q1: List the laws that are collectively called Laws of Chemical combinations.
Answer:
- Law of Conservation of Mass
- Law of Constant Composition
- Law of Multiple proportions
- Law of reciprocal proportions
- Law of Combining Volumes (Gay Lussac's law of Gaseous Volumes)
- Avogadro Law
CBSE Class 9 - Maths - Ch6 - Lines and Angles (Set-2)
Q1: Prove that two lines which are both parallel to the same line, are parallel to each other.
Answer:
Given: Three lines l, m, n in a plane such that l || m and m || n.
Saturday 28 July 2012
CBSE Class 11 - Chemistry - CH1 - Mole Concept
Q1: Define mole
Answer: A mole (or mol) is defined as the amount of substance which contains equal number of particles (atoms / molecules / ions) as there are atoms in exactly 12.000g of carbon-12.
One mole of carbon-12 atom has a mass of exactly 12.000 grams and contains 6.02 × 1023 atoms.
A mol is just a number like a dozen. A dozen equals to 12 eggs , a gross of Pencil equals to 144 Pencil. Similarly, mol is equal to 6.022 × 1023(Avagadro constant). Mol is also known as chemist dozen.
Answer: A mole (or mol) is defined as the amount of substance which contains equal number of particles (atoms / molecules / ions) as there are atoms in exactly 12.000g of carbon-12.
One mole of carbon-12 atom has a mass of exactly 12.000 grams and contains 6.02 × 1023 atoms.
A mol is just a number like a dozen. A dozen equals to 12 eggs , a gross of Pencil equals to 144 Pencil. Similarly, mol is equal to 6.022 × 1023(Avagadro constant). Mol is also known as chemist dozen.
Friday 27 July 2012
CBSE Class 8 - Science - Ch4 - Metals and Non-Metals #eduvictors
Metals and Non-Metals
Q1. Which of the following can be beaten into thin sheets?
(a) Zinc
(b) Phosphorus
(c) Sulphur
(d) Oxygen
Answer: (a) Zinc, as it is a metal. The rest of these are non-metals.
Q2. Which of the following statements is correct?
(a) All metals are ductile.
(b) All non-metals are ductile.
(c) Generally, metals are ductile.
(d) Some non-metals are ductile.
Answer: (c) Generally, metals are ductile.
Mercury (metal) is liquid at room temperature and cannot be drawn into wires. Therefore, it is non-ductile.
Thursday 26 July 2012
NTSE examination shifts to class 10
NCERT announced the date of NTSE examination for class 10. Earlier the examination was conducted for students of standard 8.
Stage I (State)
Last Date for Submission of Application Form - 31st August, 2012
Examination in Mizoram, Meghalaya, Nagaland and
Andaman and Nicobar Islands - 17th November, 2012 (Saturday)
Examination in All other States and - 18th November 2012 (Sunday)
Union Territories
Stage II (National)
Examination in All States and Union Territories - 12th May, 2013 (Sunday)
Stage I (State)
Last Date for Submission of Application Form - 31st August, 2012
Examination in Mizoram, Meghalaya, Nagaland and
Andaman and Nicobar Islands - 17th November, 2012 (Saturday)
Examination in All other States and - 18th November 2012 (Sunday)
Union Territories
Stage II (National)
Examination in All States and Union Territories - 12th May, 2013 (Sunday)
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