\(\mathrm{pH}\) of a saturated solution of \(\mathrm{Ca}(\mathrm{OH})_{2}\) ts \(9 .\) The solublity product \(\left(\mathrm{K}_{\mathrm{sp}}\right)\) of \(\mathrm{Ca}(\mathrm{OH})_{2}\) is

Which of the following salts will give highest \(pH\) in water?

Identify the incorrect statement from the following :

Compound \(X\) on reaction with \(O _{3}\) followed by \(Zn /\) \(H _{2} O\) gives formaldehyde and \(2-\)methyl propanal as products. The compound \(X\) is :

During the preparation of Mohr's salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of \(\mathrm{Fe}^{2+}\) ion?

Which of the following is paramagnetic ?

According to law of photochemical equivalence the energy absorbed (in ergs/mole) is given as \((h = 6.62 \times 10^{-27} \ ergs,\)\( \ c = 3 \times cm s^{-1}, \)\(\ N_A = 6.02 \times 10^{23} \ mol^{-1})\)

Select the correct statement.

In which of the following pair both the species have \(sp^3\) hybridization?

Which would be the heart rate of a person if the cardiac output is \(5\; \mathrm{L},\) blood volume in the ventricles at the end of diastole is \(100 \;\mathrm{mL}\) and at the end of ventricular systole is \(50\; \mathrm{mL} ?\)

The order of stability of the following tautomeric compounds is \(\mathop {\begin{array}{*{20}{c}}
  {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ 
  {C{H_2} = C - C{H_2} - C - C{H_3}} 
\end{array}}\limits_{(I)}  \rightleftharpoons \) \(\mathop {\begin{array}{*{20}{c}}
  {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ 
  {C{H_3} - C - C{H_2} - C - C{H_3}} 
\end{array}}\limits_{(II)}  \rightleftharpoons \) \(\mathop {\begin{array}{*{20}{c}}
  {OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||} \\ 
  {C{H_3} - C = CH - C - C{H_3}} 
\end{array}}\limits_{(III)} \)

Higher yield of NO in
\(\text N _2(\text g)+ \text O _2(\text g) \rightleftharpoons 2 \text{NO} (\text g)\) can be obtained at
[\(\Delta \text H\) of the reaction \(=+180.7 \text{kJ mol} ^{-1}\)]
A. higher temperature
B. lower temperature
C. higher concentration of \(\text N _2\)
D. higher concentration of \(\text O _2\)
Choose the correct answer from the options given below :

A spring is stretched by \(5 \,\mathrm{~cm}\) by a force \(10 \,\mathrm{~N}\). The time period of the oscillations when a mass of \(2 \,\mathrm{~kg}\) is suspended by it is :(in \(s\))