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The ratio of the masses of nitrogen and hydrogen present in 1 g of ammonia is 14:3. How many times the mass of 1 g of hydrogen atoms would nitrogen weigh in 2.5 g of ammonia?

A solution of 200 ml of 1M KOH is added to 200 ml of 1M HCl and the mixture is shaken well. The rise in temperature $T_1$ is noted. The experiment is repeated by using 100 ml each solution and increase in temperature $T_2$ is again noted. Which of the following is correct ?

Volume of one mole gas changes according to The V=a/T . If temperature change is∆T then work done will be

Alkynes are more acidic than alkanes and alkenes due to:

When n-Propane is nitrated at 670K, four different products are formed. Two of them are 2-Nitropropane and Nitromethane. What are the other two products?

Maximum bond angle at nitrogen is present in which of the following?

Which among the following are positional isomers?

Question 4

Which of the following hydrides is elctron-precise hydride?

(a) $B_2{H}_6$ (b)$N{H}_3$ (c) $H_{2}O$ (d) $C{H}_4$

In a cubical box of volume $V$, there are $N$ molecules of a gas moving randomly. If $m$ is mass of each molecule and $v^2$ is the mean square of $x$ component of the velocity of molecules, then the pressure of the gas is

The exact volumes of $1M$ $NaOH$ solution required to neutralise $50\text{mL}$ of $1M{H}_{3}P{O}_3$ solution and $100\text{mL}$ of $2M{H}_{3}P{O}_2$ solution, respectively, are:

The best coagulant for the precipitation of $Fe(OH{)}_3$ sol is:

Acetamide is treated separately with the following reagents. Which would give methyl amine

[IIT 1983; CPMT 1988, 94; MP PET 1993;

MP PMT 1996; AIIMS 1998]

The activation energy of the reaction:
$A+B\to$ Products is 105.73 KJ/mol. At ${40}^{\circ }C$ , the products are formed at the rate of 0.133 mol $L^{-1}mi{n}^{-1}$ the rate of formation of products at ${80}^{\circ }C$ will be

What will be the normality of a solution obtained by mixing $100mL0.1NHCl$ and $200mL0.25NHN{O}_3$ ?

Aluminium displaces hydrogen from dilute HCL whereas silver doesnot.The emf of a cell prepared by combining AL/AL*3+ is 2.46 V.The reduction potential of silver electrode is +0.80V.the reduction potential of alluminium electrode is

Which
of the following reactions will get affected by increasing the
pressure?

Also,
mention whether change will cause the reaction to go into forward or
backward direction.

(i)

(ii)

(iii)

(iv)

(v)

(vi)

For the reaction, $2NO\left(g\right)+O_2\left(g\right)\to 2N{O}_2\left(g\right)$ the value of $\Delta H$ is $-113.1\text{kJ}$. If $6.0\text{moles}$ of $NO$ reacts with $3.0\text{moles}$ of $O_2$ at $1.0\text{atm}$ and $300\text{K}$ to form $N{O}_2$. Calculate the work done against a pressure of $1.0\text{atm}$.
(Take $R=\frac{1}{12}{\text{L atm mol}}^{-1}{\text{K}}^{-1}$)

Apart from tetrahedral geometry, another possible geometry for $C{H}_4$ is square planar with the four H atoms at the corners of the square and the C atom at its centre. Explain why $C{H}_4$ is not square planar?

An
antifreeze solution is prepared from 222.6 g of ethylene glycol
(C₂H₆O₂)
and 200 g of water. Calculate the molality of the solution. If the
density of the solution is 1.072 g mL⁻¹,
then what shall be the molarity of the solution?

The Functional isomer of 'Y' is

In any subshell, the maximum nunber of electrons having same value of spin quantum number is :

If $75\%$ of a first order reaction was completed in 90 minutes, $60\%$ of the same reaction would be completed in approximately:

Octet rule is not valid for which of the following molecules?

Electrophiles are

The Henry's law constant for the solubility of $N_2$ gas in water at $298\text{K}$ is $1\times {10}^5$ atm. The mole fraction of $N_2$ in air is $0.8$. Calculate the number of moles of $N_2$ dissolved in $10\text{moles}$ of water at $298\text{K}$ and $5\text{atm}$.