Blood and lymph are types of

Which one of the following oxides reacts with both acid and base?

Which of the following can be beaten into thin sheets?

Which of the following is correct regarding frequency?

I. Frequency is expressed in hertz

II. A frequency of 1 Hz is one oscillation per minute

Up to what temperature can a mercury thermometer measure?

The seed multiplication ratio of rapeseed, red gram, hybrid maize, sorghum and jute is:

Which of the following statement(s) is/are true?

I. Air expands on heating

II. The warm air is heavier than the cold air

A day is considered a rainy day when it receives a rainfall of:

Which of the following statement is correct?

I. Speed of sound in steel is more than the speed of sound in glass.

Which of the following types of coal is called a brown coal among the following?