Which of the following monosaccharides is a pentose?

Which of the following fluxes is used to remove acidic impurities in metallurgical process?

On addition of $1 \ mL$ solution of $10 \% \ NaCl$ to $10 \ mL$ gold sol in the presence of $0.025 \ g$ of starch,the coagulation is just prevented. What is the gold number of starch?

$A$ cannon shell fired breaks into two equal parts at its highest point. One part retraces its path to the cannon with kinetic energy $E_1$,and the kinetic energy of the second part is $E_2$. The relation between $E_1$ and $E_2$ is:

What is the period of small oscillations of the block of mass $m$ if the springs are ideal and pulleys are massless?

Which domain includes well-known pathogenic organisms?