Questions

Give an example of a salt which gives an aqueous solution of pH less than 7.

Which type of permanent tissue helps the aquatic plants to float?

The largest artery in human body is

Which Virus causes Chicken Pox?

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/Phrase.
At loggerheads

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

That which cannot be put out

A farmer's land is in the shape of a trapezium which has its parallel sides measuring 2.56 yards and 3.44 yards and the distance between the parallelsides in 1.44 yards. The cost of ploughing the land is Rs 1800 per square yard. What amount will (in Rs) have to be spent in order to plough the entire land?

In a Δ ABC, DE || BC. D and E lie on AB and AC respectively. If AB = 7 cm and BD = 3cm, then find BC:DE