Which of the following statements is correct?

3

Questions Match

1.
Which of the following statements is correct?

1. 28 g CO contains 12 g C and 16 g Oxygen2. One mole of CO reacts with half mole of O2 to from CO23. N2 and CO have same molar mass4. All of these

2. The torque acting on a particle is given by \( \vec{\tau} = \vec{r} \times \vec{F} \). Which of the following statements is correct?

1. Torque is always parallel to the force2. Torque is always perpendicular to both r and F3. Torque is scalar4. Torque is maximum when angle between r and F is 0°

3. In an elastic collision, which of the following statements is correct?

1. Only momentum is conserved2. Only energy is conserved3. Both kinetic energy and momentum are conserved4. Neither momentum nor energy is conserved

Which of the following statements is correct?