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Copper crystallises in fcc unit cell with cell edge length of $3.608 \times 10^{-8}$ cm. The density of copper is $8.92$ g cm$^{-3}$. Calculate the atomic mass of copper.
The pollution due to oxides of sulphur gets enhanced due to the presence of: (a) particulate matter (b) ozone (c) hydrocarbons (d) hydrogen peroxide. Choose the most appropriate answer from the options given below:
If radius of second Bohr orbit of the $\text{He}^+$ ion is $105.8 \text{ pm}$, what is the radius of third Bohr orbit of $\text{Li}^{2+}$ ion?
The correct IUPAC name of the following compound is
Find the emf of the cell in which the following reaction takes place at $298$ K: $\text{Ni(s)} + 2\text{Ag}^+ (0.001 \text{M}) \rightarrow \text{Ni}^{2+} (0.001 \text{M}) + 2\text{Ag(s)}$
Compound X on reaction with $O_3$ followed by $Zn/H_2O$ gives formaldehyde and 2-methylpropanal as products. The compound X is
The order of energy absorbed which is responsible for the color of complexes (A) $[Ni(H_2O)_2(en)_2]^{2+}$ (B) $[Ni(H_2O)_4(en)]^{2+}$ and (C) $[Ni(en)_3]^{2+}$ is
In the neutral or faintly alkaline medium, $KMnO_4$ oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from
Match List -I with List-II. List -I (Ores) (a) Haematite (b) Magnetite (c) Calamine (d) Kaolinite List -II (Composition) (i) $Fe_3O_4$ (ii) $ZnCO_3$ (iii) $Fe_2O_3$ (iv) $[Al_2(OH)_4Si_2O_5]$ Choose the correct answer from the options given below:
For the above reaction at 298 K, $K_c$ is found to be $3.0 \times 10^{-59}$. If the concentration of $O_2$ at equilibrium is $0.040\ M$ then concentration of $O_3$ in $M$ is
Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?
The product formed from the following reaction sequence is
The entire fleet of buses in Delhi were converted to CNG from diesel. In reference to this, which one of the following statements is false?
A dehydration reaction links two glucose molecules to product maltose. If the formula for glucose is $C_6H_{12}O_6$ then what is the formula for maltose?