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The elements which occupy the peaks of ionisation energy curve, are

For any liquid, vapor pressure increases with increase in

Using s, p, d notations, describe the orbital with the following quantum numbers.
(a) n = 1, l = 0; (b) n = 3; l =1 (c) n = 4; l = 2; (d) n = 4; l =3.

The material used for coating on electric wires to avoid electric shock is __________.

One mole of a gas is expanded from (1 L, 10 atm,300K) to (4 L, 5 atm,600K) against a constant external pressure of 1 atm. The heat capacity of gas is $50J/K.$Then the enthalpy change during the process is (1 L atm $\simeq$ 100 J)

QUESTION 14.4

Classify the following into monosaccharides and disaccharides, Ribose, 2- deoxyribose, maltose, galactose, fructose and lactose.

The successive ionization energies for element $X$ are given below:
$I{E}_1=250{\text{kJ mol}}^{-1}$
$I{E}_2=820{\text{kJ mol}}^{-1}$
$I{E}_3=1100{\text{kJ mol}}^{-1}$
$I{E}_4=1400{\text{kJ mol}}^{-1}$
Find out the number of valence electrons from the element $X$.

Match the compounds given in Column-I with the shape given in Column-II and mark the corect option.

$\begin{array}{cccc}& \text{Column - I}& & \text{Column-II}\\ \left(a\right)& Xe{F}_6& \left(i\right)& \text{Distorted octahedral}\\ \left(b\right)& Xe{O}_3& \left(ii\right)& \text{Square planar}\\ \left(c\right)& XeO{F}_4& \left(iii\right)& \text{Pyramidal}\\ \left(d\right)& Xe{F}_4& \left(iv\right)& \text{Square pyramidal}\end{array}$

Which of the following, upon treatment with $tert-BuONa$ followed by the addition of bromine water, fails to decolourize the colour of bromine?

The radius of which of the following orbit is same as that of the first Bohr's orbit of hydrogen atom?

Which compound is formed when CH₃OH reacts with CH₃-Mg-X[CPMT 1977, 89]

Amorphous substances show

(A) Short and long range or

(B)Short range ord

(C)Long range order

(D)Have no sharp M.P

When phenol is treated with $Br+2$ in the presence at $C{S}_2$ at low temperature, the product is

Among the following compounds $A$ and $B$ with molecular formula $C_9{H}_{18}{O}_3$, A is having higher boiling point than B. The possible structures of $A$ and $B$ are:

Which of the following are responsible for tertiary structure of proteins

1) Hydrogen bonding 2) Disulphide linkage

3) Hydrophobic interactions 4) Ionic bond

The correct answer is

The molal boiling point constant for water is 0.513°C kgmol^-1. When 0.1 mole of sugar is dissolved in 200g of water, the solution boils under a pressure of 1 atm at:

WHY ARE CATHODE RAYS ARE CALLED CANAL RAYS?

Which one of the following esters gets hydrolysed most easily under alkaline conditions?

Which of the following is correct order regarding oxoacids of chlorine?

In the videos we successfully arrived at Rydberg's formula for Hydrogen atom from the Bohr's Postulates.
What do you think will the modified version of Rydberg's formula for Hydrogen like atoms.

For which of the following molecule significant $\mu \ne 0$?

(a) (b)

(c) (d)

The value of rate constant of a pseudo first order reaction ..... .
(a) depends on the concentration of reactants present in small amount.
(b) depends on the concentration of reactants present in excess
(c) is independent of the concentration of reactants
(d) depends only on temperature

Assertion and Reason
In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice..
(a) Assertion and reason both are correct statements but reason does not explain assertion.
(b) Assertion and reason both are correct and reason explains asssWon.
(c) Both assertion and reason are Wrong statements.
(d) Assertion is correct statement reason is wrong statement.
(e) Assertion is wrong statement reason is correct statement.

Assertion (A) Enzymes have active sites that hold substrate molecule for a chemical reaction.
Reason (R) Drugs compete with natural substrate by attaching covalently to the active site of enzyme.

Elements of group 14

(a) exhibit oxidation state of +4 only

(b) exhibit oxidation state of +2 and +4

(c) form $M^{2–}$ and $M^{4+}$ ion

(d) form $M^{2+}$ and $M^{4+}$ ions

Three black bodies are such that maximum intensity wavelength are in the ratio ${\lambda }_{m1}:{\lambda }_{m2}:{\lambda }_{m3}=1:(15{)}^{1/2}:(7{)}^{1/2}$.
Which of the following is true for the temperatures?

0.1 mol of $C{H}_{3}N{H}_2(K_b=6\times {10}^{-4})$ is added to 0.08 mol of $HCl$ and the solution is diluted to $1L$. The hydrogen ion concentration in the solution is:

Indiborane

An electron beam is accelerated by a potential difference $V$ to hit a metallic target to produce X-rays. It produces continuous as well as characteristic X-rays. If ${\lambda }_{min}$ is the smallest possible wavelength of X-rays in the spectrum, the variation of $\log {\lambda }_{min}$ with log $V$ is correctly represented in

Which among the following will not show chain isomerism:

Find out the correct order of basic strength among the given compounds.

Which of the following product(s) may be formed by the reaction of diborane with ammonia?

The correct structure of
5-(2-Chlorobutoxy)pentanoyl chloride is :

The total number of protons present in 124 g of $N{O}_3^{-}$ are:

The product(s) when dichlorine hexoxide reacts with $NaOH$ is(are):

Which one is the most acidic compound?

Why must vitamin C be supplied regularly in diet?

Which of the following is correct structure of $\text{4-bromo-6-cyclopropylcyclohex-1-en-1-ol}$?

Considering the elements $K,Ca,Rb$ and $Cs$, the correct order of their metallic character is: