IIT-JEE Practise paper-11 [Test]

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Muggu

IIT-JEE Practise paper-11

A test by Muggu.

Test Questions

Question

An electron has a spin quantum number +1/2 and a magnetic quantum number –1. It cannot be present in;

Answers

Correct	Answer Text
	p-orbital
	s-orbital
	d-orbital
	f-orbital

Question

If the electronic structure of oxygen atom is written as

it would violate;

Answers

Correct	Answer Text
	Hund’s rule
	None of these
	Pauli’s exclusion principal
	Both Hund’s and Pauli’s principal

Question

At temperature, T, a compound AB_2(g) dissociates according to the reaction
$2AB_2(g) \leftrightharpoons 2AB(g) + B_2(g)$ with a degree of dissociation x, which is small compared with unity. The expression for K_p , in terms of x and the total pressure, P is;

Answers

Correct	Answer Text

Question

Two systems $PCl_5(G) \leftrightharpoons PCl_3(g) + Cl_2(g)$ and $COCl_2 \leftrightharpoons CO(g) + Cl_2(g)$ are simultaneously in equilibrium in a vessel at constant volume. If some Cl_2 is introduced into the vessel then at the new equilibrium the concentration of:

Answers

Correct	Answer Text
	is less
	none of these
	remain unchanged
	is greater

Question

Answer the following 5 question on the basis of the given paragraph.

Ordinary chemical reactions consist simply of rearrangements of the electrons in atoms and molecules. In these changes, the atomic nuclei involved are not affected. In the phenomenon of radioactive disintegartion, both nuclei and electrons can be involved. A chemical reaction of this kind is referred to as a nuclear reaction. One method of producing nuclear alteration involves the bombardment of atomic nuclei with various kind of high speed particles.

The possibility of artificial transmutation was first suggested when it was discovered that different kinds of atoms are composed of the same fundamental units; protons., electrons and neutrons. Essentially, the problem is in how the number of each of these types of particles could be changed. Rutherford first suggested that alpha particles, which could be easily obtained from radium, could be used.

He throught that a few of the particles might make direct hits and either combine with the nuclei or break them up. His theory was proven when he used these particles to transmute $^{14}N$ to $^{17}O$ and the chemical community was shocked. Since then, protons (p), photons ( $\gamma$ -rays in particular), neutrons (n), electrons (-le^0) and positrons $(_{+1}e^0)$ have been used in these types of reactions.

What is the nuclear reaction for the transmutation of $^{14}N$ to $^{17}O$ ?

Answers

Correct	Answer Text
	$^{14}_7N + ^4_2He \rightarrow n + ^{17}_8O$
	$^{14}_7N + ^4_2He \rightarrow ^0_{-1}e + ^{17}_8O$
	$^{14}_7N + ^4_2He \rightarrow ^0_{+1}e + ^{17}_8O$
	$^{14}_7N + ^4_2He \rightarrow p + ^{17}_8O$

Question

The larger the bombarding particle and the greater its charge, the more difficult it is to use in artificial transmutation. Which of the following represents the order of particles in terms of increasing ability to be used in these type of reactions given that charge is the more important factor?

Answers

Correct	Answer Text
	$n < p < e < \alpha$
	$\alpha < e < p < n$
	$\alpha < p < e < n$
	$n < e < p < \alpha$

Question

A radioactive form of phosphorus undergoes $\upsilon$ -decay. What would the radioactivity level (R) versus time graph for the decay process look like FIGURE?

Answers

Correct	Answer Text

Question

How do you suppose a positron will react in an electric field?

Answers

Correct	Answer Text
	It would be attracted to the positive plate
	It would be attracted to the plate with the greater charge density
	It would be attracted to the negative plate
	It would retain its original flight path

Question

Given that a particular $\beta$ -particle has a kinetic energy of $2.275*10^{-5}$ J , what is the velocity of this particle? Mass of an electron $9.1*10^{-31}$ kg?

Answers

Correct	Answer Text
	$1.4*10^7 ms^{-1}$
	$1.0*10^8 ms^{-1}$
	$2.5*10^7 ms^{-1}$
	$7.1*10^7 ms^{-1}$

Question

In each of the following 1 question, a statement of Assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Of the statement, mark the correct aanswer as;

Assertion: Electronic configuration of K(19) is 1s^2, 2s^22p^6, 3s^23p^6,4s^1.

Reason: Energy of 4s < 3d hence, 4s is filled before 3d as decided by Aufbau rule.

Answers

Correct	Answer Text
	both A and R are true but R is not the correct explanation of A
	A is true but R is false
	A is false but R is true
	both A and R are true and R is the correct explanation of A