TET-Ctet-Chemistry-set-47

Chemistry MCQs for all Competitive Exams SET-47
Chemistry Multiple Choice Questions

Chemistry Multiple Choice Questions(MCQ)
रसायन विज्ञान बहुविकल्पीय प्रश्न

Welcome to our exclusive collections of chemistry multiple choice questions with answers. All questions are of multiple choice type.In these MCQs sets we are going to share most important questions related to chemistry. These questions are very helpful for those candidates and aspirants who are preparing for the various government and non government exam as well as in interview.
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Chemistry MCQs for all Competitive Exams SET-47
रसायन विज्ञान बहुविकल्पीय प्रश्न


Question : 1-10

Question : 1

Vapour pressure of pure ‘A’ is 70 mm of Hg at 25 °C. It forms an ideal solution with ‘B’ in which mole fraction of A is 0.8. lf the vapour pressure of the solution is 84 mm of Hg at 25 °C, the vapour pressure of pure ‘B’ at 25 °C is

[A].   70 mm
[B].   140 mm
[C].   28 mm
[D].   56 mm


Question : 2

50 cm3 of 0.2 N HCl is titrated against 0.1 N NaOH solution. The titration was discontinued after adding 50 cm3 of NaOH. The remaining titration is completed by adding 0.5 N KOH. The volume of KOH required for completing the titration is

[A].   12 cm3
[B].   10 cm3
[C].   21.0 cm3
[D].   16.2 cm3


Question : 3

The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits ______.

[A].   optical isomerism
[B].   geometric isomerism
[C].   both optical and geometric isomerism
[D].   neither optical nor geometric isomerism


Question : 4

9.65 coulombs of electric current is passed through fused anhydrous MgCl2. The magnesium metal thus obtained is completely converted into a Grignard reagent. The number of moles of Grignard reagent obtained is

[A].   1 × 10–4
[B].   5 × 10–4
[C].   1 × 10–5
[D].   5 × 10–5


Question : 5

The compound on dehydrogenation gives a ketone. The original compound is

[A].   primary alcohol
[B].   secondary alcohol
[C].   tertiary alcohol
[D].   carboxylic acid


Question : 6

A buffer solution contains 0.1 mole of sodium acetate dissolved in 1000 cm3 of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is ______.

[A].   pKa + 1
[B].   pKa
[C].   pKa + Log 2
[D].   pKa = Log 2


Question : 7

When carbon monoxide is passed over solid caustic soda heated to 200°C, it forms

[A].   Na2CO3
[B].   NaHCO3
[C].   HCOONa
[D].   CH3COONa


Question : 8

A chemical reaction proceeds into the following stepsStep I, 2A Ý X fastStep II, X + B Ý  Y slowStep III, Y + B Ý Product fastThe rate law for the overall reaction is

[A].   Rate = k[A]2
[B].   Rate = k[B]2
[C].   Rate = k[A][B]
[D].   Rate = k[A]2[B]


Question : 9

When compared to DG0 for the formation of Al2O3 , the AG0 for the formation of Cr2O3 is

[A].   higher
[B].   lower
[C].   same
[D].   unpredicted


Question : 10

The empirical formula of a nonelectrolyte is C1H2O1. A solution containing 6 g of the compound exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The molecular formula of the compound is ______.

[A].   C3H6O3
[B].   C2H4O2
[C].   C4H8O4
[D].   C5H10O5





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