Zinc on reaction with NaOH gives a salt (P) along with a gas (X). (P) on reaction with a gas (V) gives white precipitate (W). Which of the following is correct?
Enthalpy of\[C{{H}_{4}}+1/2{{O}_{2}}\to C{{H}_{3}}OH\] is negative. If enthalpy of combustion of \[C{{H}_{4}}\] and \[C{{H}_{3}}OH\]are 'x' and 'y' respectively, then which of the following relations is correct?
Calcium and chlorine form \[CaC{{l}_{2}}\] rather than CaCl because
A)
Less energy is required to remove one electron from the calcium atom than to remove two electrons.
doneclear
B)
More energy is released in forming chloride ions from chlorine molecules in the foci-nation of \[CaC{{l}_{2}}\left( s \right)\]than in the formation of CaCl(s).
doneclear
C)
The lattice energy of CaCl(s) is less exothermic than that of \[CaC{{l}_{2}}\left( s \right)\].
doneclear
D)
When CaCI(s) is formed from its elements, more energy is released than when \[CaC{{l}_{2}}\left( s \right)\] is formed from its elements.
In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron?
An experiment requires 100 \[c{{m}^{3}}\] of \[20.0%,\]\[{{H}_{2}}S{{O}_{4}}\], density \[1.14g/c{{m}^{3}}\]. How much concentrated acid of density \[1.84g/c{{m}^{3}}\] and containing \[98%\] \[{{H}_{2}}S{{O}_{4}}\] by weight, must be diluted with water to prepare \[100\text{ }c{{m}^{3}}\] acid of the required solution?
In a flask of volume \['V'\]litres, 0.2 mol of oxygen, 0.4 mol of nitrogen, 0.1 mol of ammonia and 0.3 mol of helium are enclosed at\[27{}^\circ C\]. If the total pressure exerted by these non-reacting gases is 1 atmosphere, the partial pressure exerted by nitrogen is
An element has successive ionization energies as 940 (first). 2080, 3090, 4140, 7030, 7870, 16000 and 19500 kJ\[mo{{l}^{-1}}\]. To which group of the periodic table does this element belong?