List of top Questions asked in UP Board XII

Define standard electrode potential. Calculate the standard electrode potential of the following cell:
Zn / Zn$^{2+}$ $\;\;||\;\;$ Cu$^{2+}$ / Cu when
$E^{0}_{(Zn^{2+}/Zn)} = -0.76 \, V$ and $E^{0}_{(Cu^{2+}/Cu)} = +0.34 \, V$.
Define order of reaction. How will you find out the order of reaction of the reaction nA + mB $\rightarrow$ xC + yD?
What happens when—
(i) Chromite ore reacts with potassium carbonate in presence of air.
(ii) Potassium dichromate reacts with ferrous sulphate in presence of sulphuric acid.
(iii) Potassium permanganate is heated up to 513 K.
Explain molar conductivity. The resistance of a cell filled with 0.02 mol L$^{-1$ KCl solution is 480 $\Omega$. Calculate the molar conductivity of the solution. (Cell constant = 1.29 cm$^{-1}$).}
Which of the following amine does not give carbylamine reaction?
Which of the following test is not given by aldehydic group present in glucose?
Explain molarity and molality by example.
Explain the following:
(i) Lanthanoid contraction
(ii) Oxidation states in Lanthanoids and Actinoids
Explain valence bond theory in coordination compounds.
Explain Wurtz and Fittig reactions by examples.
28 g KOH (molar mass = 56) is dissolved in 500 mL solution. Calculate the molarity of the solution.
The concentration of solute in a solution is 3.5 ppm. By which of the following it may be expressed?
The most common oxidation states of Mn are –
The co-ordination number of Cu in [Cu(CN)$_4$]$^{3-$ ion is:}
Which of the following is obtained by Wolff Kishner reduction?
If the matrix A = \(\begin{bmatrix} 0 & 2y & z
x & y & -z
x & -y & z \end{bmatrix}\) satisfies the equation AA' = I, then find the values of x, y and z.
Given any two events A and B are such that \( P(A) = \frac{1}{2}, P(B) = \frac{1}{4} \) and \( P(A \cap B) = \frac{1}{8} \), then find \( P(\text{not A and not B}) \).
If a function \( f: \mathbb{R} \to \{ x \in \mathbb{R} : x \in (-1, 1) \} \) is defined as \( f(x) = \frac{x}{1+|x|}, \ x \in \mathbb{R} \), then prove that f is one-one and onto.
If \( x\sqrt{1+y} + y\sqrt{1+x} = 0\), \(-1 < x < 1\), then prove that \(\frac{dy}{dx} = -\frac{1}{(1+x)^2} \).
How is the flexible rate of exchange determined? Explain.
Explain consumer's equilibrium with the help of indifference curves.
OR
When the price of a commodity increases from Rs. 10 per unit to Rs. 11 per unit, demand shrinks from 100 units to 90 units. Calculate elasticity of demand.
What do you understand by Perfect Competition? Explain its salient features.
OR
Explain the supply curve of a firm in the short period and long period.
Following data is related to an economy. On the basis of these data calculate National Income of that economy: Wages: 1000, Rent: 400, Interest: 50, Dividend: 300, Mixed Income: 250. (Amounts in Crore Rupees).
OR
Describe the Product method of estimation of National Income.
What do you mean by "Market"?
What is meant by "Full Employment"?