MCQ
There is no atmosphere on moon because
  • A
    There is no vegetation
  • The escape velocity at its surface is very low
  • C
    Diffusion constant of gases is high
  • D
    There is vacuum in space

Answer

Correct option: B.
The escape velocity at its surface is very low
b
(b)

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

One mole of ideal monoatomic gas $(\gamma = 5/3)$ is mixed with one mole of diatomic gas $(\gamma = 7/5).$ What is $\gamma $ for the mixture$?$ $\gamma $ denotes the ratio of specific heat at constant pressure, to that at constant volume
A small cylindrical soft iron piece is kept in a galvanometer so that
The period of moon’s rotation around the earth is nearly $29$ days. If moon’s mass were $2$ fold, its present value and all other things remained unchanged, the period of moon’s rotation would be nearly .........$ days$
Two pulses on a string approach each other at speeds of $1 m/s$. What is the shape of the string at $t = 3s$ :-
In a hypothetical fission reaction
${ }_{92} X ^{236} \rightarrow{ }_{56} Y ^{141}+{ }_{36} Z ^{92}+3 R$
The identity of emitted particles (R) is :
In an experiment four quantities $a, b, c$ and $d$ are measured with percentage error $1\%, 2\%, 3\%$ and $4\%$ respectively. Quantity $w$ is calculated as follows $w\, = \,\frac{{{a^4}{b^3}}}{{{c^2}\sqrt D }}$  error in the measurement of $w$ is .......... $\%$
The motion of a charged particle can be used to distinguish between a magnetic field and electric field in a certain region by firing the charge
You lift a heavy book from the floor of the room and keep it in the book-shelf having a height $2 \,m$. In this process you take $5\, seconds$. The work done by you will depend upon
A pendulum bob on a $2\, m$ string is displaced $60^{°}$ from the vertical and then released. What is the speed of the bob as it passes through the lowest point in its path .......... $m/s$
A vertical cylindrical container of base area $A$ and upper cross-section area $A_1$ making an angle $30^o $ with the horizontal is placed in an open rainy field as shown near another cylindrical container having same base area $A$. The ratio of rates of collection of water in the two containers will be