Action of water on Calcium carbide
Action of water on Calcium carbide.
Write a balanced chemical equation
To which wire of a cable in a power circuit
To which wire of a cable in a power circuit should the metal case of a geyser be connected?
The power of a lens is -5D
The power of a lens is -5D.
- Find its focal length.
- Name the type of lens.
What do you understand by the term ‘Scattering of light’
What do you understand by the term ‘Scattering of light’? Which colour of white light is scattered the least and why?
Calculate the quantity of heat produced in a 20 Ω resistor carrying
Calculate the quantity of heat produced in a 20 Ω resistor carrying 2.5A current in 5 minutes.
Alkenes are a homologous series of
Copy and complete the following paragraph using the options given in brackets:
Alkenes are a homologous series of (i) _____ (saturated / unsaturated) hydrocarbons characterized by the general...
There is plenty of rain in India during the rainy season, yet we need irrigation
There is plenty of rain in India during the rainy season, yet we need irrigation. Give two reasons to support this statement.
Hypotonic solution and Hypertonic solution
Hypotonic solution and Hypertonic solution [condition of a plant cell when placed in them]
Differentiate between the following pairs on the basis of what is indicated in the brackets.
Using a graph paper draw a histogram for the given distribution
Using a graph paper draw a histogram for the given distribution showing the number of runs scored by 50 batsmen. Estimate the mode of the data:
Answer the following questions with reference to Jack London’s, ‘The Call of the Wild’.
Answer the following questions with reference to Jack London’s, ‘The Call of the Wild’.
(i) Why is Buck regarded as the protagonist (the hero) of Jack London’s book ‘The Call of the Wild’?
(ii)...
The figure below shows a simple pendulum of mass 200 g
The figure below shows a simple pendulum of mass 200 g. It is displaced from the mean position A to the extreme position B. The potential energy at the position A is zero. At the position B the...
$x^2 + 4kx + (k^2 -k + 2) = 0$
Find the value of k for which the following equation has equal roots.
$x^2 + 4kx + (k^2 - k + 2) = 0$
NH4OH Solution when added to the Solution (B) gives white ppt which does not dissolve in excess
NH4OH Solution when added to the Solution (B) gives white ppt which does not dissolve in excess.
Identify the cations in each of the following case:
How long can the Rajya Sabha retain the money bill sent by the Lok Sabha
How long can the Rajya Sabha retain the money bill sent by the Lok Sabha?
Explain the development of Modern means of Transport and Communication
With reference to the rise of ‘National Consciousness’ in India, Explain the development of Modern means of Transport and Communication.
The first and last term of a Geometrical Progression (G.P.) are 3 and 96 respectively
The first and last term of a Geometrical Progression (G.P.) are 3 and 96 respectively. If the common ratio is 2, find:
- ‘n’ the number of terms of the G.P.
- Sum of the n terms.