Which type of cartilage is found at the ends of long bones?

What is the $B-F$ bond order in $BF_3$?

Which of the following statements is incorrect regarding viruses?

Efficiency of a heat engine whose sink is at a temperature of $300 ~K$ is $40 \%$. To increase the efficiency to $60 \%$,keeping the sink temperature constant,the source temperature must be increased by (in $~K$)

Which among the following is a dicarboxylic acid?

What is the entropy change in $J K^{-1}$ during the melting of $27.3 \ g$ of ice at $0^{\circ} C$? (Latent heat of fusion of ice $= 330 \ J g^{-1}$)