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IIT-JEE MAIN: CHEMISTRY TEST-3

2

TEST SYLLABUS : COMPLETE CHEMISTRY

Your Target is to secure Good Rank in IIT-JEE - 2020

Important Instructions:

(1) There is only one correct option.

(2) Duration of Test is 1 Hour and Questions Paper Contains 30 Questions. The Max. Marks are 120.

(3) Each correct answer carries 4 marks, while 1 mark will be deducted for every wrong answer. Guessing of answer reduces your effort. 

1 / 30

Aqueous solution of (M) + (NH4)2S → yellow ppt (B)+(NH4)2S2 → insoluble.

2 / 30

The variation of concentration of A with time in two experiments starting with two different initial concentration of A is given in the following graph. The reaction is represented as A (aq)→ B (aq). What is the rate of reaction (M/min) when concentration of A in aqueous solution was 1.8 M ?

3 / 30

Calculate the millimoles of SeO32– in solution on the basis of following data :

70 ml of M/60 solution of KBrO3 was added to SeO32– solution. The bromine evolved was removed by boiling and excess of KBrO3 was back titrated with 12.5 mL of M/25 solution of NaAsO2.

The reactions are given below.

(1) SeO32- +  BrO3- +  H+ → SeO42- + Br2 + H2O

(2) BrO3+  AsO2- + H2O +Br- +  AsO43- +  H+

4 / 30

Amongst the following alcohols which would react fastest with conc. HCl and ZnCl2 ?

5 / 30

Let n1 be the frequency of the series limit of the Lyman series, n2 be the frequency of the first line of the Lyman series, and n3 be the frequency of the series limit of the Balmer series, then –

6 / 30

Which of the following option is having maximum number of unpaired electrons –

7 / 30

Me – CH = CH2 + CHCl3  (aq.KOH excess, Δ)→ A (Major products) is –

8 / 30

For the extraction of Pb when impurity content is very high, then during roasting of galena, the formation of which compound (s) is/are prevented by lime –

9 / 30

Structure of some important polymers are given. Which one represents Buna-S?

10 / 30

NH4ClO4 + HNO3 (dilute) →X + HClO4

X→Y (gas) Gas (Y) is –

11 / 30

For the reaction takes place at certain temperature NH4HS ⇌ NH3 (g) + H2S (g), if equilibrium pressure is X bar, then ΔG° would be –

12 / 30

1 mole of gas X is present in a closed adiabatic vessel fitted with a movable frictionless piston. The initial temperature of gas X is 300 K. The vessel is maintained at constant pressure of 1 atm. Keeping the pressure constant at 1atm the reaction (3X (g) → 2Y(g) ; DH = –30 kJ/mol) is started with the help of negligible amount of electric energy. If finally 75 mole % of X undergone reaction at constant pressure of 1 atm, find the final temperature (in K) of reaction vessel. Given : Cp,m (X) = 40 J/K mole, Cp,m(Y) = 30 J/K mole.

13 / 30

The conductivity of a saturated solution of Ag3POis 9 × 10–6 Sm–1 and its equivalent conductivity is 1.50 × 10–4 Sm2 equivalent–1. The Ksp of Ag3PO4 is –

14 / 30

Match List I with List II and select the correct answer :

15 / 30

The instantaneous rate of disappearance of MnO4 ion in the following reaction is 4.56 × 10–3 Ms–1

2MnO4– + 10I + 16H+ → 2Mn2+ + 5I2 + 8H2O

The rate of appearance I2 is :

16 / 30

What would be the reduction potential of an electrode at 298 K, which originally contained 1M K2Cr2Osolution in acidic buffer solution of pH = 1.0 and which was treated with 50% of the Sn necessary to reduce all Cr2O72– to Cr3+. Assume pH of solution remains constant. Given : E0Cr2O72- /Cr3+ ,H+  = 1.33 V, log2 = 0.3, 2.303RT/F = 0.06

17 / 30

Which of the following is/are formed when ozone reacts with the unburnt hydrocarbons in polluted air ?

(i) Formaldehyde (ii) Acrolein
(iii) Peroxyacetyl nitrate (iv) Formic acid

18 / 30

Number of α-H in alkene which is major product in this reaction is –

19 / 30

Which of the following xenon-oxo compounds may not be obtained by hydrolysis of xenon fluorides?

20 / 30

At 675K, H2(g) and CO2(g) react to form CO(g) and H2O (g), Kp for the reaction is 0.16. If a mixture of 0.25 mole of H2(g) and 0.25 mol of CO2 is heated at 675K, mole % of CO(g) in equilibrium mixture is –

21 / 30

End product (B) of above reaction is –

22 / 30

This question contains Statement-1 and Statement-2. Of the four choices given after the statements, choose the one that best describes the two statements.

Statement 1 : [HeH]+ is more stable as compared to H2+.

Statement 2 : Both the above species are having equal bond order.

23 / 30

Which statement is incorrect regarding thermite process –

24 / 30

How many pairs of enantiomers are possible for following complex compound. [M (AB) (CD) ef](where AB, CD– Unsymmetrical bidentate ligand, e, f–Monodentate ligands)

25 / 30

pH of a saturated solution of silver salt of monobasic acid HA is found to be 9. Find the Ksp of sparingly soluble salt Ag A (s). Given Ka (HA) = 10–10.

26 / 30

Precautions to be taken in the study of reaction rate for the reaction between potassium iodate (KIO3) and sodium sulphite (Na2SO3) using starch solution as indicator at different concentrations and temperature –

27 / 30

Choose the correct option for

28 / 30

Which of the following carbide does not release any hydrocarbon on reaction with water.

29 / 30

In the given molecule choose the correct order of their angle.

30 / 30

Which one of the following is the correct statement?

Your score is

The average score is 28%

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