CDS General Knowledge 2018 Question Paper

Which one of the following elements is used as a timekeeper in atomic clocks?

Which one of the following elements is involved in the control of water content of the blood?

Which one of the following gases dissolves in water to give acidic solution?

Which one of the following elements is essential for the formation of chlorophyll in green plants?

Consider the following chemical reaction :
$a{\text{Fe}}_2{\text{O}}_3(s)+b\text{CO}(g)\to c\text{Fe}(s)+d{\text{CO}}_2$
In the balanced chemical equation of the above, which of the following will be the values of the coefficients $a$, $b$, $c$ and $d$ respectively?

Why is argon gas used along with tungsten wire in an electric bulb?

Which one of the following is the correct relation between the Kelvin temperature ($T$) and the Celsius temperature ($t_c$)?

Sound waves cannot travel through a

Which one of the following is the value of one nanometer?

Consider the following statements :

1. There is no net moment on a body which is in equilibrium.
2. The momentum of a body is always conserved.
3. The kinetic energy of an object is always conserved.
   Which of the statements given above is/are correct?