List of top Atmospheric Science Questions

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The zero point energy is $\frac{1}{2}h\theta$, it is the lowest value of the energy of the Harmonic Oscillator. Reason (R) : Harmonic Oscillator is in equilibrium with its surroundings, it is called zero-point as it corresponds to an energy $E=E_0$ and not to $E=0$ when the external temperature approaches to $0 \text{ K}$. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The wavelength of radiation is displaced as temperature changes, but the product of wavelength and temperature remains constant. Reason (R) : Wien's Law is a special case of Planck's radiation law in the region of longer wavelength. In the light of the above statements, choose the most appropriate answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : At constant temperature and pressure, equal volumes of all gases contain the same number of molecules. Reason (R) : At constant temperature, the mean molecular energies of these gases will be equal. In the light of the above statements, choose the most appropriate answer from the options given below :

Arrange the following in ascending order of their escape speeds :
A. Jupiter
B. Sun
C. Earth
D. Neutron Star

Intensity of a double-slit interference pattern is represented as: $I(\theta) \propto [\text{interference factor} \times \text{diffraction factor}]$. The diffraction factor is given by: [where $\alpha = \frac{\pi a}{\lambda} \sin\theta, \beta = \frac{\pi d}{\lambda} \sin\theta$, $a$ is width of single slit and $d$ is slit separation]

An ideal monotonic gas containing five moles at $27^\circ\text{C}$ and one atm pressure is expanded adiabatically to thrice of its volume. The change in internal energy is:

Which of the following statements are correct about pollution control ?
A. Use of new fuel which has less pollutants.
B. Treatment or removal of pollutant.
C. Increase the use of pollutant sources.
D. Incomplete burning of carbon particulates.
E. Purification of air using natural cycle.
Choose the correct answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Air pollution causes significant deterioration in visibility.
Reason (R) : The rates of emissions or formation of pollutants greatly exceed the rate at which the pollutants are dispersed by winds or removed by chemical reaction.
In the light of the above statements, choose the most appropriate answer from the options given below :

What is the relative efficiency of air molecules to scatter blue light ($\lambda = 470$ nm) as compared to red light ($\lambda = 640$ nm)?

Which one of the following is INCORRECT about the impact of atmospheric pollution and emission of Greenhouse gases ?

Which one of the following is NOT an objective of Air Monitoring ?

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Smog refers to heavily polluted air that forms in cities during winter.
Reason (R) : It is the emission of CH$_4$ and aerosols from the burning of fossils.
In the light of the above statements, choose the most appropriate answer from the options given below :

The virtual temperature correction for moist air at 40$^\circ$C that has a mixing ratio of 25 g kg$^{-1}$ is :

Which one of the following is artificial pollutant ?

Which one of the following reservoirs of water in the Earth system has largest residence time ?

Which of the following statements are correct about the correlation co-efficient ?
A. Its value falls between $-1$ and $+1$.
B. Its value changes when the unit of measurement gets changed.
C. It measures only the strength of linear association between variables.
D. It is a dimensionless quantity.
Choose the correct answer from the options given below :

Which of the following statements are correct about central tendency ?
A. Quartiles are those values which divide the frequency into four equal parts, when values are arranged in ascending order.
B. Lower quartile is mid-way between lower extreme and the mean.
C. Upper quartile is mid-way between upper extreme and median.
D. Difference between lower and upper quartiles is the inter-quartile range.
Choose the correct answer from the options given below :

Which of the following statements are correct about standard deviation ?
A. It is the root-mean-square deviation from mean.
B. It is always positive.
C. It is dependent of the change of origin.
D. It is independent of the scale of measurement.
Choose the correct answer from the options given below :

Let $x_1, x_2, \ldots, x_{n_1}$ and $y_1, y_2, \ldots, y_{n_2}$ are two independent random samples from normal population with same variance. To test the hypothesis, the t-test is given by : [Here $\mu_1$ and $\mu_2$ are means of two samples].

Which one of the following is INCORRECT about normal distribution?
(1) It is bell-shaped and symmetrical about its mean.
(2) Its mean, median and mode are same.
(3) Mean deviation from the mean is $\frac{4}{5}$ times standard deviation.
(4) Area under the normal distribution within three standard deviation from mean is 95.5%.

The variance of 20 observations is 5. If each observation is multiplied by 2, then, the new variance of resulting observations is:

Which one of the following is mathematical notation for precision? [where $\sigma$ is standard deviation]

The errors of an experiment are of random nature and follows a normal distribution. If standard deviation is '$\sigma$', the probable error is:

A Computer uses ASCII for internal representation of characters. Arrange the following ASCII characters in ascending order : A. \( A1 \)
B. \( 1A \)
C. \( a2 \)
D. \( 2a \)
E. \( aA \) Choose the correct answer from the options given below :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Optical disk drives are slower than magnetic disk drives. Reason (R): In optical disk, each sector has the same length regardless of its position from the center. In the light of the above statements, choose the most appropriate answer from the options given below :