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(क) तुम्हें सर्दी-गरमी के मौसम में अपने घर के आसपास क्या-क्या दिखाई देता है?

(ख) तुमने पाठ में पढ़ा कि एक बूढ़ी महिला ताड़पत्र से बनी छतरी लिए खड़ी थी। पता करो कि ताड़पत्र से और क्या-क्या बनाया जाता है?

(ग) विश्वेश्वरैया ने बचपन में रामायण, महाभारत, पंचतंत्र आदि की कहानियाँ सुनी थीं। तुमने पाठ्यपुस्तक के अलावा कौन-कौन सी कहानियाँ सुनी हैं? किसी कहानी के बारे में बताओ।

(घ) तुम्हारे मन में भी अनेक सवाल उठे होंगे जिनके जवाब तुम्हें नहीं मिले। ऐसे ही कुछ सवालों की सूची बनाओ।

(ङ) तुम्हारे विचार से गरीबी के क्या कारण हैं?

The vapour pressure of pure benzene at a certain temperature is $640mmHg$. A non - valatile solid weighing $2.175g$ is added to $39.0g$ of benzene. The Vapour pressure of the solution is $600mm$ Hg. What is the molecular mass of the solid substance?

If $K_1$ and $K_2$ are the respective equilibrium constants for the two reactions:
(i) $Xe{F}_6\left(g\right)+H_{2}O\left(g\right)\rightleftharpoons XeO{F}_4\left(g\right)+2HF\left(g\right)$
(ii) $Xe{O}_4\left(g\right)+Xe{F}_6\left(g\right)\rightleftharpoons XeO{F}_4\left(g\right)+Xe{O}_3{F}_2\left(g\right)$
then the equilibrium constant for the reaction:
$Xe{O}_4\left(g\right)+2HF\left(g\right)\rightleftharpoons Xe{O}_3{F}_2\left(g\right)+H_{2}O\left(g\right)$ will be:

Why some ions like Zn^+2 Cu^+1 Sc^+3 Ti^+4 are colourless?

Consider the following species:

$C{N}^{+},C{N}^{-},NO\text{and}CN$

Which one of these will have the highest bond order?

Which of the following compound have same geometry among the following:

(i) $H_{2}O$ (ii) $AlC{I}_3$ (iii) $C{H}_4$ (iv) $N{F}_3$

Which of the following compounds cannot show geometrical isomerism ?

Chlorine reacts with sodium hydroxide under various condition to give

What
would be the SI unit for the quantity pV²T
²/n?

Which of the following has the lowest electron affinity?

Name the type of isomerism when ambidentate ligands are attached to central metal ion. Give two examples of ambidentate ligands.

Which of the following is correct adsorption isobar for physisorption ?

Here,

$\left(\frac{x}{m}\right)$ is extent of adsorption per unit mass of adsorbent

What should be the freezing point of aqueous solution containing $17g$ of $C_2{H}_{5}OH$ in $1000g$ of water ($K_f$ for water = ${1.86}^{\circ }Ckgmo{l}^{-1}$

Define :- a) Thermodynamics

The hybridization involved in complex $\left[Ni\right(CN{)}_4{]}^{2-}$ is (Atomic number of Ni = 28)

The species $C{H}_3\stackrel{+}{C}HC{H}_3$ is less stable than:

The ratio of rates of effusion of $S{O}_2$ to $S{O}_3$ is:

The specific conductance of a saturated solution of silver chloride at ${25}^{o}C$ after subtracting the specific conductance of water is $2.28\times {10}^{-4}S{m}^{-1}$. Calculate the solubility of silver chloride in grams per $d{m}^3$ at this temperature.

${\Lambda }_m^0\left(AgCl\right)=138.3\times {10}^{-4}S{m}^{2}mo{l}^{-1}$

$M\left(AgCl\right)=143.5gmo{l}^{-1}$

One mole of a monatomic ideal gas undergoes four thermodynamic processes as shown schematically in the $PV$-diagram below. Among these four processes, one is isobaric, one is isochoric, one is isothermal and one is adiabatic. Match the processes mentioned in List-1 with the corresponding statements in List-II.

Given three reactions:

Reaction 1 :

$A(aq.)\rightleftharpoons A^{n+}(aq.)+n{e}^{-}$

$E^{\circ }=+2V$



Reaction 2:

$B(aq.)\rightleftharpoons B^{n+}(aq.)+n{e}^{-}$

$E^{\circ }=-3V$



Reaction 3:

$C^{n+}(aq.)+n{e}^{-}\rightleftharpoons C(aq.)$

$E^{\circ }=+4V$



The correct decreasing order of the tendency of the species A, B and C to get oxidised is:

There are four elements P, Q, R and S with their electronic configuration given in the options. Which of these elements belong to the same group?

In the Lewis dot structure of Al3+ , we should draw 8 dots or to write Al only without any dot ?

5 moles of AB2 weigh 125×10−3kg and 10 moles of A2B2 weigh 300×10−3kg.The molar mass of A(MA) and molar mass of B(MB) in kg/mol are :

In a simple cubic lattice of anions, the side length of the unit cell is $3.0\stackrel{o}{A}.$ The diameter of the void in the body centre is

Smelting of iron is carried out in