CBSE Class 9 - Science - CH3 - Atoms and Molecules (Worksheet)

Atoms and Molecules (Worksheet)

Water Molecule

Fill in the blanks

1. An element has only one type of __________.

2. According to law of definite proportions, in a chemical substance the elements are always present in __________ proportions by mass.

3. According to Dalton's atomic theory, atoms of different elements differ in ______, size and chemical properties.

4. The chemical symbol of flourine is ________.

5. The chemical symbol of mercury is _________.

CBSE Class 7 - Science - CH16 - Water: A Precious Resource

Water: A Precious Resource

Save Water
credits:openclipart

NCERT Solutions, Q & A

Q1: When 'World Water Day' is celebrated?

Answer: March 22nd.

Q2: What is the main objective of celebrating 'Water Day'?

Answer: We celebrate water day every year to attract the attention of everybody towards the
importance of conserving water.

Q3: How much much amount of water is recommended by UN for daily use by a person?

CBSE Class 9 - English PSA Worksheet

English - PSA Worksheet

(Questions asked in one of  the public school at Delhi. PSA stands for Problem Solving Assessment, a test to be conducted by schools as per CBSE guidelines)



Tick (✓) the right option to fill in the blanks:

Q1: A crowd gathered to watch the _________ of ships in the harbour.

(a) band
(b) pack
(c) fleet
(d) crew

Class 9 - Maths - PSA Sample Test Paper/NTSE MAT Quiz-16

Class 9 - Maths - PSA Sample Test Paper

NTSE MAT Quiz-16

(Questions asked in one of  the public school at Delhi. PSA stands for Problem Solving Assessment, a test to be conducted by schools as per CBSE guidelines)

MCQs

Q1: If Rekha can type a page in 'm' minutes, what piece of the page she can do it in 10 minutes?

(a) 10/m
(b) m - 10
(c) M + 10
(d) m/10

CBSE Class 9 - English Grammar - Dialogue Completion

Dialogue Completion

Q1(CBSE 2012): Read the following conversation and complete the dialogues by choosing the correct option.

Interviewer :  (a) ___________your school ?
Raman        :  I think my school is the best school in the city.
Interviewer :  (b) _____________ in your school ?
Raman        :  Mrs Dolly Chopra is the best. She teaches us English.
Interviewer :  (c) _________ in English ?
Raman        :  I got 95 marks out of hundred
Interviewer :  (d) ____________ to your performance ?
Raman        :  I am sure she was happy.

CBSE Class 11/10 - Computers/FIT - Programming Languages

Programming Languages

(Questions & Answers)

Q1: What is a computer language?

Answer: The instructions are fed into computers in the form of computer programs, follow some semantics (grammar or syntax) collectively is called a programming language. In layman terms, the language, which the user employs to interact with computer, is known as computer or programming language.

Examples are: C/C++, Java, Pascal, COBOL, Python, FORTRAN etc.

CBSE class 6 - Science - CH 15 - Air Around Us

Air Around Us

Air Balloon

NCERT Solution and Q & A

Q1: What is the composition of air?
Answer: Air is a mixture gases, water vapours and dust particles. Largely it consists of:

1. Nitrogen (79%)
2. Oxygen (20%)
3. Carbon Di-Oxide (1%)
4. Other gases like Helium, Hydrogen etc.
5. Water Vapours
6. Dust particles

CBSE Class 10 - Social Science - CH 5 - Minerals and Energy Resources

Minerals and Energy Resources

MCQs

Q1: Limestone is associated with

(a) Sedimentary rock

(b) Igneous rock

(c) Metamorphic rock

(d) Tertiary rock

CBSE Class 7 - Maths - CH4 - Simple Equations (Ex 4.4)

Simple Equations 

(NCERT Exercise 4.4)

Important Points:
❶ An equation which has only one variable whose power is one is called a SIMPLE EQUATION.

❷ In a simple equation keeping only the variable in the LHS of the equation and moving the constant to RHS (right hand side) is called the method of TRANSPOSITION.

❸ Rules for method of Transposition are:

1. A positive constant in the LHS becomes a negative constant when it is taken to the RHS and vice versa.
2. A negative constant in the LHS becomes a positive constant when it is taken to the RHS and vice versa.
3. The coefficient of the variable in tbe LHS becomes t.he multiplicative inverse when it is taken to the RHS :and vice versa.

❹ An equation remains the same if the LHS and the RHS are interchanged.

CBSE Class 9 - Hindi Antonyms Quiz (विलोम शब्द प्रश्नोत्तरी)

विलोम/विपरीतार्थक शब्द प्रश्नोत्तरी

(Antonyms Quiz)

प्र१(CBSE 2011):'निराकार' शब्द का विलोम है

(क) आकार
(ख) साकार
(ग) प्रकार
(घ) विकार