CDS || Weekly_Revision_Quiz_2020

If tan θ + sec θ = 2, then tan θ is equal to:

A’s salary was increased by 40% and then decreased by 20%. On the whole A’s salary is increased by:

A number consists of two digits; whose sum is 7. If the digits are reversed, the number is increased by 27. The product of digits of the number is

 is equal to :

A pole is standing erect on the ground which is horizontal. The tip of the pole is tied tight with a rope of length √12 m  to a point on the ground. If the rope is making 30° with the horizontal, then the height of the pole is:

The circumference of a circle is 100 cm. The side of the square inscribed in the circle is:

When hard water is evaporated completely, the white solid remains in the container. It may be due to the presence of

1) carbonates of Ca and Mg

2) sulphates of Ca and Mg

3) chlorides of Ca and Mg

Select the correct answer using the codes given below:

Which one among the following statement is correct?

Which one among the following compounds has the same equivalent weight and molecular weight?

A metallic plate sticks firmly on the mouth of a water vessel made from another metal. By way of heating, one can detach the plate from the vessel. This is because heat expands