CBSE Class 11 - Mathematics - CH1 - Sets (Unit Test Paper) (#cbseNotes)

Sets 

(Unit Test Paper)

CBSE Class 11 - Mathematics

1. Write the set of all vowels in the English alphabet which precede k. [1]

2. Is pair of sets equal? Give reasons. [1]
A = {2, 3} B = x : x is solution of x 2 + 5x + 6 = 0}

3. Write the following intervals in set builder form: [1]
(-3, 0) and [6, 12]

CBSE Class 9 Hindi (B) - कक्षा ९ - हिंदी - संचयन - पाठ १ - गिल्लू (#cbseNotes)

पाठ १ - गिल्लू

कक्षा  ९ - हिंदी - संचयन 

प्र१: सोनजुही में लगी पीली कली को देख लेखिका के मन में कौन से विचार उमड़ने?

उत्तर : गिल्लू  को सोन जूही की लता  सबसे अधिक प्रिय थी | जब उसकी मृत्यु हुई तो उसको उसी लता के नीचे समाधि दे दी गई |  सोन जूही में लगी पीली कली को देखकर लेखिका को लगा कि गिल्लू कली के रूप में प्रकट हो रहा है|


प्र २: पाठ के आधार पर कौवे को एक साथ समादरित और अनादरित प्राणी क्यों कहा जाता है?

उत्तर: हमारी संस्कृति में पूर्वजों को बहुत महत्व दिया गया है |  मान्यता है पितृ पक्ष में पुरखे ना गरुड़ के  रूप में आ सकते हैं, ना मयूर के, ना हंस के | हमसे कुछ पाने के लिए कौवे के रूप में आना पड़ता है|  श्राद्ध के दिनों में कौय को आदर दिया जाता है|  लोग इन दिनों सबसे पहले कौवे को भोजन देते हैं तब कौवा समादरित प्राणी है|  इसके विपरीत कौवे की काँव-काँव कर्कश स्वर में होती है तब वह अनादरित प्राणी माना जाता है|   

CBSE CLASS 12 - Biology - CH 5 - Principles of Inheritance and Variation - Important Definitions (#cbseNotes)

Principles of Inheritance and Variation - Important Definitions

CBSE CLASS 12 - Biology

Q1: Define heredity.

Answer: It can be defined as the transmission of characters from one generation to successive generations of living organisms.


Q2: Define Alleles

Answer: The various forms of a gene are called alleles.


Q3: What are multiple alleles?

Answer: If a gene has more than two alleles then they are said to be multiple alleles. e.g. In humans ABO blood groups is an example for multiple allelism.


Q4: What is genotype?

Answer: The genetic constitution of an organism is its genotype.


Q5: What is phenotype?

Answer: The external / observable characteristics of an organism constitute its phenotype.

CBSE Class 12 Business Studies -Syllabus (2017-18) (#cbseNotes)

Business Studies -Syllabus (2017-18)

CBSE Class 12 Business Studies

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

CBSE Class 6 Science - CH4: Sorting Materials Into Groups (Worksheet) (#cbsenotes)

Sorting Materials Into Groups

Worksheet

Q1: Identify the following items which are soluble or insoluble in water?

ⅰ Salt
ⅱ Kerosene Oil
ⅲ Sand
ⅳ Sugar
ⅴ Chalk Powder
ⅵ Lime Juice
ⅶ Cooking Oil
ⅷ Vinegar


Q2: Materials are classified on the basis of appearance, hardness, solubility, density and transparency. Write down properties for the following items:

ⅰ Metals
ⅱ Plastic
ⅲ Wood
ⅳ Glass

CBSE Class 11 Business Studies -Syllabus (2017-18) (#cbseNotes)

Business Studies -Syllabus (2017-18)

CBSE Class 11 Business Studies

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

CBSE CLASS 12 - PHYSICS - RAY OPTICS AND OPTICAL INSTRUMENTS - Very Short Question Answers (#cbsenotes)

RAY OPTICS AND OPTICAL INSTRUMENTS

CBSE CLASS 12 - PHYSICS

Very Short Question Answers

Q1: What is the focal length and power of a plane glass plate?

Answer: Focal length of plane glass is infinite and its power = 0.


Q2: What is the mathematical relation between object distance (p) and image distance (i) in a plane mirror?

Answer: i = -p


Q3: An object is placed at the focus of  concave lens. Where will its image be formed? 

Answer: The real image will be formed at infinity.


Q4: If the speed of light were the same in all media, would refraction still occur when light passes from one medium to another? 

Answer: No change in speed of light causes bending of light rays in refraction.