Questions

A Sonar of a ship sends sounds waves of speed 1000 m/s. These waves are reflected back by the ocean floor in 2 seconds. Find the depth (in m) of theocean floor. 

Resistance switching is normally employed in

Out of the four alternatives, choose the one which can be substituted for the given words/sentences and click the button corresponding to it.

A place where astronomical observations are made

Ferns belong to which division of plants?

What is the process of rust forming on iron called?

Which of the following elements has the lowest melting point?

Which of the following compounds is the strongest acid?

In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No Error'.

I had not completed my English homework (1)/ so I thought I was done with when the (2)/ teacher asked me to hand it in. (3)/ No Error (4)