The end correction for the vibrations of air column in a tube of circular cross-section will be more if the tube is

Which of the following is a disaccharide?

Which one of the following cannot form an amphoteric oxide?

Which of the following is the correct order of size of the given species?

$A$ radioactive nucleus (initial mass number $A$ and atomic number $Z$) emits $3$ $\alpha$-particles and $2$ positrons. The ratio of neutrons to protons in the final nucleus will be:

An infinitely long straight conductor is bent into the shape as shown below. It carries a current of $I$ ampere and the radius of the circular loop is $R$ metre. Then,the magnitude of magnetic induction at the centre of the circular loop is