Download App

Environmental Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEnvironmental Chemistry2 Marks
Question
What is greenhouse effect?
✓

Answer

The increase in temperature of atmosphere due to presence of gases like $\mathrm{CH}_4$, $\mathrm{CO}_2$ and water vapours which absorb infrared radiation is called greenhouse effect.

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

Explore more

More "2 Marks Questions" from Environmental Chemistry→Environmental Chemistry — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

How would you know whether a redox reaction is taking place in an acidic, alkaline or neutral medium?
→
Mention the chief reason for the anomalous behavior of boron in Group 13 of the periodic table.
→
On the basis of VSEPR theory, predict the shapes of the following molecules and ions:
  1. $\text{PH}_3$
  2. $\text{NH}_3$
  3. $\text{NH}^-_2$
  4. $\text{H}_3\text{O}^+$
→
Nucleophiles and electrophiles are reaction intermediates having electron rich and electron deficient centres respectively. Hence, they tend to attack electron deficient and electron rich centres respectively. Classify the following species as electrophiles and nucleophiles.
  1. $\text{H}_3\text{CO}^-$
  2. $\ \ \ \ \ \ \ \ \ \ \ \ \ \text{O}\\\ \ \ \ \ \ \ \ \ \ \ \ \ ||\\\text{H}_3\text{C}-\text{C}-\text{O}^-$
  3. $\ \dot{}\\\text{Cl}$
  4. $\text{Cl}_2\text{C}:$
  5. $(\text{H}_3\text{C})_3\text{C}^+$
  6. $\text{Br}^-$
  7. $\text{H}_3\text{COH}$
  8. $\text{R}-\text{NH}-\text{R}$
→
What happens when.
Boric acid is added to water.
→
At 298 K what will be the change in standard internal energy change for the given reaction:
$\mathrm{OF}_2(\mathrm{~g})+\mathrm{H}_2 \mathrm{O}(\mathrm{~g}) \rightarrow \mathrm{O}_2(\mathrm{~g})+2 \mathrm{HF}(\mathrm{~g}) \Delta \mathrm{H}=-310 \mathrm{~kJ}$
→
Define the following and also tell their units.
(i) Frequency
(ii) Wavelength
(iii) Wavenumber.
→
Write the expression for equilibrium constant $K_p$ for the reaction:
$3\text{Fe(s)}+\text{4H}_2\text{O(g)}\rightleftharpoons\text{Fe}_3\text{O}_4(\text{s})+4\text{H}_2(\text{g})$
→
$\text{Hb(s)}+\text{O}_2\text{(g)}\rightleftharpoons\text{HbO}_2\text{(s)}$
Predict the direction in which equilibrium gets shifted it partial pressure of $\text{O}_2$ is lowered.
→
Consider the following reaction: $\mathrm{H}_2(\mathrm{~g})+\mathrm{F}_2(\mathrm{~g}) \rightarrow 2 \mathrm{HF}(\mathrm{g}) \Delta\text{H}^\circ=-542\text{kJ},\ \Delta\text{S}^\circ=14\text{JK}^{-1}$
Calculate the $\Delta\text{G}^\circ$ value for the reaction and state if the reaction is spontaneous at 298K.
→