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4NH₃ + 5O₂ → 6H₂O + 4NO When 1 mole of ammonia (NH₃) reacts with 1 mole of oxygen (O₂), which of the following outcomes occurs regarding the consumption of the reactants?
The molecular formula of a commercial resin used for exchanging ions in water softening is $C_8H_7SO_3Na$ (Mol. Wt. 206). The maximum uptake of $Ca^{2+}$ ions by the resin when expressed in mole per gram resin is based on the reaction: $$ 2C_8H_7SO_3Na + Ca^{2+} \rightarrow (C_8H_7SO_3)_2Ca + 2Na^+ $$
An incorrect statement among the following is :
It is because of the inability of $ns^2$ electrons of the valence shell to participate in bonding that:
The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence?
Which of the following is a coloured and paramagnetic compound?
Which one of the following does not correctly represent the correct order of the property indicated against it?
A set of ions among the following that have a $3d^2$ electronic configuration is:
Name the type of the structure of silicate in which one oxygen atom of $[\text{SiO}_4]^{4-}$ is shared?
If enthalpies of formation of $C_{2}H_{4}(g)$, $CO_{2}(g)$ and $H_{2}O(l)$ at $25^{\circ}C$ and 1 atm pressure be 52, –394 and –286 kJ mol⁻¹ respectively, the enthalpy of combustion of $C_{2}H_{4}(g)$ will be [CBSE PMT 1995; AIIMS 1998; Pb. PMT 1999]:
Identify the incorrect statement:
Select the correct statements from the following: A. Atoms of all elements are composed of two fundamental particles. B. The mass of the electron is $9.10939 \times 10^{-31}$ kg. C. All the isotopes of a given element show the same chemical properties. D. Protons and electrons are collectively known as nucleons. E. Dalton's atomic theory regarded the atom as an ultimate particle of matter. Choose the correct answer from the options given below:
Colourless ion among the following is:
Which of the following oxidation states are the most characteristics for lead and tin respectively?
The incorrect statement among the following is:
Percentage of C, H & N in a compound is given as follows: C=40%; H=13.33%; N=46.67% The empirical formula of the compound will be:
Which of the following options incorrectly describes the possible range of values for the mole fraction ($x$) of a component in a mixture?
The number of $d$-electrons in $\text{Fe}^{2+}$ (atomic number $Z = 26$) is different from the number of:
Which one of the following anions is present in chain structure silicates?
The chain length of silicones can be controlled by adding: