Question : In a magnifying glass, _________ lens is used.

Option 1: convex

Option 2: concave

Option 3: plano-concave

Option 4: plano-convex

Question : The length of a rectangle is increased by 10% and breadth is decreased by 10%. The area of the new rectangle is:

Option 1: neither increased nor decreased.

Option 2: increased by 1%.

Option 3: decreased by 2%.

Option 4: decreased by 1%.

Question : Two equal glasses filled with alcohol and water in the proportions 2 : 1 and 3 : 2 are emptied into a third glass. The proportion of alcohol and water in the third glass will be:

Option 1: 13 : 17

Option 2: 19 : 17

Option 3: 13 : 11

Option 4: 19 : 11

Question : Directions: Needle is related to Sew in the same way as Microscope is related to __________.

Option 1: Lens

Option 2: Laboratory

Option 3: Magnify

Option 4: Science

Question : Chord PQ is the perpendicular bisector of radius OA of the circle with centre O. (A is a point on the edge of the circle). If the length of Arc $PAQ=\frac{2\pi}{3}$. What is the length of chord PQ?

Option 1: $2$

Option 2: $\sqrt{3}$

Option 3: $2\sqrt{3}$

Option 4: $1$