Science (English Medium) Class 11 - CBSE Question Bank Solutions

Which of the following sentences are statements? Give reasons for your answer.

The square of a number is an even number.

Which of the following sentences are statements? Give reasons for your answer.

The sides of a quadrilateral have equal length.

Which of the following sentences are statements? Give reasons for your answer.

Answer this question.

Which of the following sentences are statements? Give reasons for your answer.

The product of (–1) and 8 is 8.

Which of the following sentences are statements? Give reasons for your answer.

The sum of all interior angles of a triangle is 180°.

Which of the following sentences are statements? Give reasons for your answer.

Today is a windy day.

Which of the following sentences are statements? Give reasons for your answer.

All real numbers are complex numbers.

Which of the following collection are sets? Justify your answer:

 The collection of all girls in your class.

Which of the following collection is set? Justify your answer: 

The collection of ten most talented writers of India.

Which of the following collection are sets? Justify your answer: 

 The collection of difficult topics in mathematics.

Which of the following collection are sets? Justify your answer: 

 A collection of novels written by Munshi Prem Chand.

Which of the following collection are sets? Justify your answer: 

The collection of all question in this chapter.

Which of the following collection are sets? Justify your answer:  

The collection of prime integers.

If A = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], then insert the appropriate symbol ∈ or ∉ in each of the following blank space: 

4 ...... A  

If A = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], then insert the appropriate symbol ∈ or ∉ in each of the following blank space: 

−4 ...... A 

If A = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], then insert the appropriate symbol ∈ or ∉ in each of the following blank space: 

 9 ...... A

If A = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], then insert the appropriate symbol ∈ or ∉ in each of the following blank space:  

 0 ...... A

If A = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], then insert the appropriate symbol ∈ or ∉ in each of the following blank space: 

−2 ...... A

Describe the following sets in Roster form: 

{x : x is a letter before e in the English alphabet}