Assertion (A): Among halogens fluorine is the best oxidant.
Reason (R): Fluorine is the most electronegative atom.
Codes:
(a) both assertion and reason are true and the reason is the correct explanation of assertion
(b) both assertion and reason are true but reason is not the correct explanation of assertion
(c) assertion is true but reason is false
(d) both assertion and reason are false

The oxidation number of fluorine in all its compounds is equal to ______________.

The empirical formula of glucose is __________

The maximum number of electrons in a sub shell is given by the expression _____________

What will be the wavelength of a ball of mass 0.1 kg moving with a velocity of 10ms^-1?

Which of the following is the actual configuration of Cr (Z = 24)?

Balance the following equations by ion electron method.
i) \({ KMn }O_{ 4 }+{ SnCl }_{ 2 }+HCI\longrightarrow MnCI_{ 2 }+{ SnCI }_{ 4 }+{ H }_{ 2 }O+KCI\)
ii) 
iii) 
iv) 

Give the relationship between the number of mole of the substance and its gram molecular mass.

Calculate the equivalent masses of the following - Oxalic acid H₂C₂O₄

Define orbital ? what are the n and 1 values for 3p_x and 4d_x²-y² electron ?

What is the difference between atomic mass and mass number?

How many electrons can be accommodated in the main shell I,m and n?

The percentage of all the elements present o in a compound is 95. What does it indicate?

Calculate the number of atoms/molecules present in the following 100 g of sulpur dioxide

Calculate the mass of the following atoms in a.m.u (unified atomic mass).

An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom?

Which ion has the stable electronic configuration? Ni²⁺ or Fe³⁺.

Calculate the de Broglie wavelength of an electron moving with 1% of the speed of light?

Balance the following equations by oxidation number method.
KMnO₄ + KOH + H₂O₂ ⟶ K₂MnO₄ + O₂ + H₂O

Balance the following equation by oxidation number method:
P + HNO₃ \(\rightarrow\)H₃PO₄ + NO₂ + H₂O

Calculate the percentage composition of the elements present in magnesium carbonate. How many kilogram of CO₂ can be obtained by heating 1 kg of 90 % pure magnesium carbonate.

\({ 2NH }_{ 3 }\left( g \right) +{ CO }_{ 2 }\left( g \right) \rightarrow \underset{Urea}{H_2N}-\overset { \underset { || }{ O } }{ C } -{ NH }_{ 2 }\left( aq \right) +{ H }_{ 2 }O(I)\)
In a process, 646 g of ammonia is allowed to react with 1.144 kg of CO₂ to form urea.
(i) If the entire quantity of all the reactants is not consumed in the reaction which is the limiting reagent ?
(ii) Calculate the quantity of urea formed and unreacted quantity of the excess reagent. The balanced equation is 
\(\overset { { 2NH }_{ 3 }+{ CO }_{ 2 } }{ \underset { { H }_{ 2 }NCON{ H }_{ 2 }+{ H }_{ 2 }O }{ \downarrow } } \)

By applying Bohr's postulates, arrive at the radius of n^th orbit for hydrogen like atom

Show that if the measurement of the uncertainty in the location of the particle is equal to its de Broglie wavelength, the minimum uncertainty in its velocity is equal to its velocity 1/4\(\pi\) of its velocity (V).

Calculate the uncertainty in position of a dust particle of mass 0.1 mg if the uncertainty in velocity is \(5\times { 10 }^{ -19 }{ ms }^{ -1 }\)