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The elevation in boiling point of a solution of 13.44g of CuCl₂ in 1kg of water using the following information will be (Molecular weight of CuCl₂= 134.4 and K_b­= 0.52K molal^-1)

Element $Hg$ has two oxidation states $H{g}^{1+}$ & $H{g}^{2+}$, the correct order of radii of these ions?

Which of the following group of elements belongs to 4d transition series?

What are the rules for finding oxidation number?

Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :

In the given reaction the product P is

In a common emitter (CE) amplifier having a voltage gain $G$, the transistor used has transconductance $0.03{\Omega }^{-1}$ and current gain $25.$ If the above transistor is replaced with another one with transconductance $0.02{\Omega }^{-1}$ and current gain $20$, the voltage gain will be-

The compound with highest net dipole moment is ______

Which one
of the following will have largest number of atoms?

(i) 1 g Au
(s)

(ii) 1 g
Na (s)

(iii) 1 g
Li (s)

(iv) 1 g
of Cl₂(g)

A group which deactivates the benzene ring towards electrophilic substitution but which directs the incoming group principally to the o - and p - positions is

The diagram given below is a vapour pressure for a binary solution of A and B. In the solution,

A - B interactions are

The reagent used in Ullmann reaction is

The binding energy of a deuterium nucleus is about $1.115\text{MeV}$ per nucleon. Then the mass defect of the nucleus is about

The correct order of decreasing dipole moment is:

The diamagnetic species is

The electron in a hydrogen atom makes a transition $n_1\to n_2$ where $n_1\&n_2$ are the principal quantum numbers of the two states. Assume the Bohr's model to be valid the time period of the electron in the initial state is eight times that in the final state. The possible values of $n_1\&n_2$ are:

How many tetrahedral & triangular units are present in borax?

Choose the the correct order of $-I$ effect shown by the following groups.

The
experimental data for decomposition of N₂O₅

in gas
phase at 318K are given below:

t(s)	0	400	800	1200	1600	2000	2400	2800	3200
	1.63	1.36	1.14	0.93	0.78	0.64	0.53	0.43	0.35

(i)
Plot
[N₂O₅]
against t.

(ii)
Find the half-life period for the
reaction.

(iii) Draw
a graph between log [N₂O₅]
and t.

(iv)
What is the rate law?

(v)
Calculate the rate constant.

(vi)
Calculate the half-life period from k
and compare it with (ii).

Boiling point of chloroform was raised by 0.323 K, when 0.5143 g of anthracene was dissolved in 35 g of chloroform. Molecular mass of anthracene is(= 3.9 kg mol^-1)

In the following reactions, the major product W is

How many $p$ electrons are there in an atom of rubidium (Atomic number: $37$)?