With reference to the rise of National Consciousness in India, Explain any three contributions of Raja Rammohan Roy

The organic compound which undergoes substitution reaction is

1. C₂H₂
2. C₂H₄
3. C₁₀H₁₈
4. C₂H₆

Write the balanced chemical equation for the laboratory preparation of hydrogen chloride gas.

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:

Draw a graph between displacement from mean position and time for a body executing free vibration in a vacuum.

Action of Hydrochloric acid on sodium bicarbonate.

Write balanced chemical equation.

Conversion of ethene to ethane is an example of __________ (hydration / hydrogenation).

State the significance of the Policy of Appeasement as a cause for the Second World War

A gas of mass 32gms has a volume of 20 litres at S.T.P. Calculate the gram molecular weight of the gas.

The metal whose oxide, which is amphoteric, is reduced to metal by carbon reduction ____ . (Fe / Mg / Pb / Al)

A hydrocarbon which is a greenhouse gas is:

A. Acetylene

B. Ethylene

C. Ethane

D. Methane

With reference to the terms Mechanical Advantage, Velocity Ratio and efficiency of a machine, name and define the term that will not change for a machine of a given design.

How do trees in the Tropical desert forests adapt themselves to the dry climate?

1. State and define the S.I. unit of power?
2. How is the unit horse power related to the S.I. unit of power?

The V-I graph for a series combination and for a parallel combination of two resistors is shown in the figure below. Which of the two A or B, represents the parallel combination? Give a reason for...

(i) Find the equivalent resistance between A and B.

ii. State whether the resistivity of a wire changes with the change in the thickness of the wire.