Write the structural formula of the two isomers of butane

Xylem transports starch from the leaves to all parts of the plant body.

Correct the following statements by changing the underlined words:

"The modern means of irrigation are gaining popularity." Give two reasons to justify this statement.

India has a single integrated judicial system that is Independent and Supreme. With reference to the Judiciary, answer the following: Who appoints the Judges of the High Court?

State one relevant observation: Addition of excess ammonium hydroxide into copper sulphate solution.

NaOH Solution when added to Solution (C) gives white ppt which is insoluble in excess.

An object is placed at a distance 24 cm in front of a convex lens of focal length 8 cm.

1. What is the nature of the image so formed?
2. Calculate the distance of the image from the lens.
3. Calculate the
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A uniform half metre rule balances horizontally on a knife edge at 29 cm mark when a weight of 20 gf is suspended from one end.

1. Draw a diagram of the arrangement.
2. What is the weight of the half
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Copy the diagram given below and complete the path of light ray till it emerges out of the prism. The critical angle of glass is 42°. In your diagram mark the angles wherever necessary.

The polar covalent compound in gaseous state that does not conduct electricity is ______. (carbon tetra chloride, ammonia, methane)

Action of heat on aluminum hydroxide.

Match the atomic number 2, 4, 8, 15, and 19 with each of the following:

1. A solid non-metal belonging to the third period.
2. A metal of valency 1.
3. A gaseous element with valency 2.
4. An element belonging to
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State one point of distinction between a District Judge and a Sessions Judge.

Briefly explain: Rooftop rainwater harvesting

Give a reason for each of the following: Mawsynram receives the highest average annual rainfall.