Proof spirit contains about
Which one of the following reactions occur at the cathode?
When benzenediazonium chloride in hydrochloric acid reacts with cuprous chloride, then chlorobenzene is formed. The reaction is called
The Δ H value for the reaction H2 + Cl2 → 2 HCl is − 44.12 K.cal. If E1 is the activation energy of the reactants and E2 is the activation energy of the products, then for the above reaction
Conc. HNO3 forms NO2+ in presence of :
How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.0 g?(Atomic weights of Na = 23 and Cl = 35.5)
Gram formula mass of NaCl = (23 + 35.5)g = 58.5g
Number of formula units of NaCl in 1.0g of NaCl = 6.02 x 1023/58.5 x1.0
There are four formula units per unit cell in NaCl
∴ Number of unit cells = 6.02 x 10 23 x1.0/58.5 x4 = 2.57 x 1021
The vapour pressure of water at 300 K in a closed container is 0.4 atm. If the volume of the container is doubled, its vapour pressure at 300 K will be
Vapour pressure will be the same because it doesn't depend on the volume it depends only on Temperature.
The radius of which of the following orbit is same as that of the Bohr's first orbit of hydrogen atom?
If the speed of electron in the Bohrs's first orbit of hydrogen atom is x, the speed of electron in the third Bohr's orbit is ____
According to Bohr's model for hydrogen and hydrogen like atoms the velocity of an electron in an atom is quantised and is given by v ∝ 2πZe2/nh
Variation of heat of reaction with temperature is known as
The crystal field splitting energy for octahedral and tetrahedral (Δt) complexes is related as__
In an octahedral complex there is a ligand along each axis while in terahedral complex no ligand lies directly along any axis,therefore, Δt is less than Δ0.
Photochemistry is the science of the chemical effects of__
The empirical formula of an acid is CH₂O₂, the probable molecular formula of the simplest acid may be