Salts/Compounds Colour
1. Potassium dichromate, K₂Cr₂O₇ Orange
2. Potassium permanganate, KMnO₄ Violet
3. Ferric tetra-oxide, Fe₃O₄ Black
4. Ferrous sulphate, FeSO₄.7H₂O Green
5. Ferric sulphate, Fe₂(SO₄)₃ Yellow
6. Ferric hydroxide, Fe(OH)₂ Green
① Heat is a form of energy. We use this energy to generate electricity, among other things.
② The hotness or coldness of a body is relative.
③ The temperature of a body is a measure of the degree of hotness of the body. We measure it by comparing it with a universal standard.
④ The Celsius and Fahrenheit scales are commonly used to measure temperature. Ice melts at 0°C or 32°F. and water boils at 100°C or 212°F.
Q1: Who is the author of the story "A Triumph of Surgery"? What is the theme of the story?
Answer: James Alfred Wight pen named James Herriot wrote this story. The story "A Triumph of Surgery" is about a dog named Tricki. The theme of the story is about the blind love for the one whom we love the most. Mrs Pumphrey had no idea that her blind and extreme love for her dog Tricki took him to trouble. Excessive love made Tricki sick and became a reason for his illness. It can be concluded after reading the story that excessive love can take the form of extreme consequences.
Q1: What is an ordered pair?
Answer: An ordered pair is a pair of entries in the specified order.
Q2: What is ordered 2-tuple?
Answer: Another name of an ordered pair.
Q3: If A and B are any two sets, write to represent an ordered pair of elements of A and B?
Answer: (a, b) : a ∈ A, b ∈ B
Q4: Is (a, b) = (b, a)?
Answer: No. a, b) ≠ (b, a) unless a = b
Q1: What is meant by ‘efficiency’ in management?
Answer: Efficiency means doing the task correctly and with minimum cost.
Q2: How does management help in achieving personal objectives? State.
Answer: Management helps in achieving personal objectives by motivating and leading in such a way that the individual members are able to achieve personal goals while contributing to the overall organisational objectives.
Q3: Define ‘ planning premises’.
Answer: Planning premises are the assumptions made about the future on the basis of which the plans are drawn.
Choose the right answer from the four alternatives given below.
Q1: The Tropic of Cancer DOES NOT pass through:
(a) Rajasthan
(b) Chhattisgarh
(c) Odisha
(d) Tripura
Q2: The easternmost longitude of India is:
(a) 97° 25' E
(b) 68° 7' E
(c) 77° 6' E
(d) 82° 32' E
Q1: Who is the author of The Last Lesson?
(A) Jane Austen
(B) Rabindra Nath Tagore
(C) Sudha Murthy
(D) Alphonse Daudet
Q2: The story ‘The Last Lesson’ highlights which human tendency?
(A) Male Chauvinism
(B) Procrastination
(C) Courage
(D) Cowardice
