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How much heat energy is necessary to raise the temperature of 5 kg of water from 20°C to 100°C?
Concept: Specific Heat Capacity
Give a scientific reason.
Simple microscope is used for watch repairs.
Concept: Magnification
Give a scientific reason.
Simple microscope is used for watch repairs.
Concept: Magnification
Objection to Darwin's theory of natural selection.
Concept: Darwin’s Theory of Natural Selection (Darwinism)
Redraw the flow-chart with corrections. Explain in brief the process of obtaining energy through oxidation of carbohydrates, lipids & proteins.
Concept: Production of ATP
Give a scientific reason:
Hydroelectric energy, solar energy and wind energy are called renewable energies.
Concept: Electricity Generation using Hydroelectric Energy
Identify my class/phylum and give one example of it:
I live in your small intestine, my body is long and thread like and pseudocoelomate.
Concept: Non Chordates (Invertebrata) >> Phylum: Aschelminthes
What will you do? Why?
Your sister has become incommunicative. She prefers to remain alone.
Concept: Concept of Social Health
Observe the following picture and state what can be the outcome.
Concept: Concept of Social Health
Give the structural formula of ethanol.
Concept: Ethanol
Solve the following quadratic equation by using formula method: 5m2 + 5m – 1 = 0
Concept: Nature of Roots of a Quadratic Equation
Solve the equation by using the formula method. 3y2 +7y + 4 = 0
Concept: Nature of Roots of a Quadratic Equation
Find the sum of all numbers from 50 to 350 which are divisible by 6. Hence find the 15th term of that A.P.
Concept: Sum of First ‘n’ Terms of an Arithmetic Progressions
Find the term t15 of an A.P. : 4, 9, 14, …………..
Concept: General Term of an Arithmetic Progression
If the 9th term of an A.P. is zero, then prove that 29th term is double of 19th term.
Concept: General Term of an Arithmetic Progression
Decide whether the following sequence is an A.P., if so find the 20th term of the progression:
–12, –5, 2, 9, 16, 23, 30, ..............
Concept: General Term of an Arithmetic Progression
The sequence −10, −6, −2, 2, ... is ______.
Concept: Sum of First ‘n’ Terms of an Arithmetic Progressions
Choose the correct alternative answer for the following question.
For an given A.P. a = 3.5, d = 0, n = 101, then tn = ....
Concept: Sum of First ‘n’ Terms of an Arithmetic Progressions
The Sum of first five multiples of 3 is ______.
Concept: Sum of First ‘n’ Terms of an Arithmetic Progressions
In an A.P. the first term is – 5 and the last term is 45. If the sum of all numbers in the A.P. is 120, then how many terms are there? What is the common difference?
Concept: Sum of First ‘n’ Terms of an Arithmetic Progressions
