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Which one of the following statements is correct?
If $C + O_2 \rightarrow CO_2$, $C + \frac{1}{2}O_2 \rightarrow CO$, and $CO + \frac{1}{2}O_2 \rightarrow CO_2$, the heats of reaction are $Q$, $-12$, and $-10$ respectively. Then $Q$ =
Which of the following statements is true for a reaction where all the reactants and products are in the liquid phase?
Which among the following species has a triangular planar shape?
In which of the following pairs of molecules/ions, the central atoms have $sp^2$ hybridisation?
$\text{XeF}_2$ is isostructural with:
The correct order of increasing thermal stability of $\text{K}_2\text{CO}_3$, $\text{MgCO}_3$, $\text{CaCO}_3$ and $\text{BeCO}_3$ is:
$BF_3$ is a planar and an electron-deficient compound. Hybridisation and the number of electrons around the central atom, respectively, are:
Which one of the following pairs is isostructural (i.e., having the same shape and hybridization)?
Identify a molecule which does not exist.
Match List-I with List-II. **List-I (Compound)** A. $NH_3$ B. $BrF_5$ C. $XeF_4$ D. $SF_6$ **List-II (Shape/geometry)** I. Trigonal Pyramidal II. Square Planar III. Octahedral IV. Square Pyramidal
If for a given substance melting point is $T_B$ and freezing point is $T_A$, then correct variation shown by graph between entropy change and temperature is
Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?
Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes.
Adsorption of gases on a solid surface is generally exothermic because
A mixture of $N_2$ and Ar gases in a cylinder contains 7 g of $N_2$ and 8 g of Ar. If the total pressure of the mixture of the gases in the cylinder is 27 bar, the partial pressure of $N_2$ is : [Use atomic masses (in g $mol^{-1}$) : N = 14, Ar = 40]
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?
The enthalpy of combustion of $\text{H}_2$, cyclohexene ($\text{C}_6\text{H}_{10}$) and cyclohexane ($\text{C}_6\text{H}_{12}$) are $-241$, $-3800$ and $-3920 \text{ kJ per mol}$ respectively. Heat of hydrogenation of cyclohexene is:
Which of the following compounds has a higher hydration energy than the lattice energy?
<p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">In Young's double slit experiment the</p><p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">separation d between the slits is 2 mm, the</p><p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">wavelength <span class="s1" style="font-width: normal; line-height: normal; font-family: Symbol; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"></span> of the light used is 5896 Å and</p><p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">distance D between the screen and slits is</p><p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">100 cm. It is found that the angular width of</p><p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">the fringes is 0.20°. To increase the fringe</p><p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">angular width to 0.21° (with same <span class="s1" style="font-width: normal; line-height: normal; font-family: Symbol; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"></span> and D) the</p><p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">separation between the slits needs to be</p><p class="p1" style="font-width: normal; font-size: 10px; line-height: normal; font-family: Helvetica; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; color: rgb(20, 20, 19); white-space: normal;">changed to</p>