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# JEE Main Chemistry Mock - 7

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## 25 Questions MCQ Test JEE Main & Advanced Mock Test Series | JEE Main Chemistry Mock - 7

JEE Main Chemistry Mock - 7 for JEE 2023 is part of JEE Main & Advanced Mock Test Series preparation. The JEE Main Chemistry Mock - 7 questions and answers have been prepared according to the JEE exam syllabus.The JEE Main Chemistry Mock - 7 MCQs are made for JEE 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for JEE Main Chemistry Mock - 7 below.
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JEE Main Chemistry Mock - 7 - Question 1

### Primary and secondary alcohols on action of red hot copper give

JEE Main Chemistry Mock - 7 - Question 2

### Which of the following is hypnotic ?

Detailed Solution for JEE Main Chemistry Mock - 7 - Question 2
Solution :
Hypnotic or soporific drugs, commonly known as sleeping pills, are a class of psychoactive drugs whose primary function is to induce sleep and to be used in the treatment of insomnia, or surgical anesthesia.
JEE Main Chemistry Mock - 7 - Question 3

### Enzymes are made up of

JEE Main Chemistry Mock - 7 - Question 4
The order of decrease in atomic radii for Be, Na and Mg is
Detailed Solution for JEE Main Chemistry Mock - 7 - Question 4 As we move from left to right in a period, nuclear charge increases while the number of the shells remains the same. Due to this, the valence electrons are pulled little closer to the nucleus and this results in a decrease of the atomic radius. For example, when we move from Li to Be, atomic size decreases. On the other hand, the atomic radii of elements increase with increase in atomic numbers as we move from top to bottom in a group.This is due to the addition of new energy shells in each succeeding element. Thus, as we move from Li to Na, atomic radius increases and when go from Na to Mg, atomic radius decreases but not as much as in case of Be.
JEE Main Chemistry Mock - 7 - Question 5

Which of the following gives blood red colour with KCNS ?

Detailed Solution for JEE Main Chemistry Mock - 7 - Question 5
[B]
Fe+3 give blood red cloour with KCNS.
[Fe(CNS)2]+
x − 2 =  + 1
x = + 3
JEE Main Chemistry Mock - 7 - Question 6

Given that
(i) C + O₂ → CO₂ ; ∆Ho = − xkJ,
(ii) 2CO + O₂ → 2CO₂ ; ∆Ho = −ykJ .
The enthalpy of formation of carbon monoxide will be

JEE Main Chemistry Mock - 7 - Question 7
The rate at which a substance reacts depends on its
JEE Main Chemistry Mock - 7 - Question 8
[Co(NH₃)₄(NO₂)₂]Cl exhibits
JEE Main Chemistry Mock - 7 - Question 9
Strong electrolytes are those which
JEE Main Chemistry Mock - 7 - Question 10
Which of the following reagent can be used to convert benzene diazonium chloride into benzene ?
JEE Main Chemistry Mock - 7 - Question 11

In the electrochemical cell Pt, H(g) 1 atm ∕ H+(I M) ∕ Cu2+ (I M) ∕ Cu(s) . Which one of the following statements is true?

JEE Main Chemistry Mock - 7 - Question 12

pH of the solution at 250C is 2. If the pH is to be doubled then the hydronium ion concentration of the solution should be

JEE Main Chemistry Mock - 7 - Question 13
The pH of 10 M HCl aqueous solution is
JEE Main Chemistry Mock - 7 - Question 14

Given that Ka for acetic acid as 1.8x10⁻5 and Kb of NH₄OH as 1.8x10⁻5 at 25oC,predict the nature of aqueous solution of ammonium acetate

JEE Main Chemistry Mock - 7 - Question 15
Highest pH (14) is shown by
JEE Main Chemistry Mock - 7 - Question 16
Which of the following compound does not react with metallic sodium?
Detailed Solution for JEE Main Chemistry Mock - 7 - Question 16  (B) is methyl ether, presumably water free, and unreactive under normal conditions. Of course, at room temperature, it will be a gas.
JEE Main Chemistry Mock - 7 - Question 17
Which of the following polymer is formed when caprolactum is heated with the traces of water?
JEE Main Chemistry Mock - 7 - Question 18
Ethane is obtained from ethylene by which of the following methods?
JEE Main Chemistry Mock - 7 - Question 19
Which of the following is an example of body centred cube?
JEE Main Chemistry Mock - 7 - Question 20
Which of the following metal oxides is antiferromagnetic in nature?
*Answer can only contain numeric values
JEE Main Chemistry Mock - 7 - Question 21

One mole ideal monoatomic gas is heated in two different processes according to path AB and AC. If temperature of state B and state C are equal. Calculate qAC/qAB

Detailed Solution for JEE Main Chemistry Mock - 7 - Question 21

*Answer can only contain numeric values
JEE Main Chemistry Mock - 7 - Question 22

What is the molecular weight of the final product in the following reaction sequence

*Answer can only contain numeric values
JEE Main Chemistry Mock - 7 - Question 23

6.84 gm Al2(SO4)3 is needed to coagulate 2.5 L of As2S3 sol completely in 2.0 hrs. The coagulation value of Al2(SO4)3 in terms of millimoles per litre is :
[Atomic mass : Al = 27, S = 32].

*Answer can only contain numeric values
JEE Main Chemistry Mock - 7 - Question 24

An ionic compound (A+B) crystallizes in rock salt structure. If the ionic radii of A+ and B is 200 pm and 400 pm respectively, then calculate distance between nearest anions in Å.

*Answer can only contain numeric values
JEE Main Chemistry Mock - 7 - Question 25

The sum of Number of unpaired electrons in
[COCl6]–3, [Cr(NH3)6]+3 , [Zn(NH3)4]+2 →

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## JEE Main & Advanced Mock Test Series

2 videos|325 docs|189 tests