Can you solve these?

When a vector is multiplied by a negative number its direction changes by an angle of:
(a) 0°
(b) 90°
(c) 180°
(d) 360°

A vector of magnitude “1” is called:
(a) Resultant vector
(b) Null vector
(c) Unit vector
(d) Small vector

Unit vectors are used to specify:
(a) Magnitude of a vector
(b) Direction of a vector
(c) Magnitude as well as direction of a vector
(d) Unit of other vectors

If Ax,Ay and Az represent magnitudes of components of a vector A ⃗, then the magnitude of vector A ⃗is given by:
(a) A- Ax + Ay + Az
(b) A - Ax2 + Ay2 + Az2
(c) Ax2 + Ay2 + Az2
(d) √(A_x^2 + A_y^2 + A_z^2 )

Which of following is a vector quantity?
(a) Mass
(b) Distance
(c) Torque
(d) Work

If Fx = 11 N and Fy = 11 N then the angle between Fx and Fy is:
(a) 30°
(b) 45°
(c) 60°
(d) 90°

If A ⃗.B=0 and A ⃗×B= 0 then
(a) Either A ⃗ or B is null vectors.
(b) A ⃗ and B are parallel to each other
(c) A ⃗ and B are perpendicular to each other
(d) A ⃗ and B are opposite to each other

The product of mass and velocity of a body is called:
(a) Torque
(b) Force
(c) Kinetic energy
(d) Momentum