In the reaction, 2 Al ( S ) + 6 HCl ( aq ) → 2 Al ( aq ) 3 + + 6 Cl ( aq ) - + 3 H 2 ( g )

11 . 2 L H 2 ( g ) at STP is produced for every mole HCl ( aq ) consumed.

6 L HCl ( aq ) is consumed for every 3 L H 2 ( g ) produced.

33.6 L H 2 ( g ) is produced regardless of temperature and pressure for every mole Al that reacts.

67 . 2 L H 2 ( g ) at STP is produced for every mole Al that reacts.

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The empirical formula of an acid is ${CH}_{2} O_{2}$ , the probable molecular formula of acid may be_________

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Important Questions on Some Basic Concepts of Chemistry

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 21

An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave

C = 38.71 %

H = 9.67 %

and

O = 51.62 %

. The empirical formula of the compound would be

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 22

During electrolysis of water, the volume of

O_{2}

liberated is

2.24 {dm}^{3}

. The volume of hydrogen liberated, under the same conditions will be

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 23

Assuming fully decomposed, the volume of

{CO}_{2}

released at

STP

on heating

9.85 g

{BaCO}_{3}

(Atomic mass of

Ba = 137 g

.) will be ___________

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 24

What volume of hydrogen gas, at

273 K

and

1 atm

pressure will be consumed in obtaining

21.6 g

of elemental boron (atomic mass =

10.8 g

) from the reduction of boron trichloride by hydrogen?

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 25

What volume of oxygen gas

(O_{2})

measured at

0 º C

and

1 atm

, is needed to burn completely

1 L

of propane gas

(C_{3} H_{8})

measured under same conditions?

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MHT-CET

IMPORTANT

MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 26

In the reaction,

2 {Al}_{(S)} + 6 {HCl}_{(aq)} \underset{}{\to} 2 {Al}_{(aq)}^{3 +} + 6 {Cl}_{(aq)}^{-} + 3 H_{2 (g)}

EASY

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 27

How many moles of magnesium phosphate,

{Mg}_{3} ({PO}_{4})_{2}

will contain

0.25 mole

of oxygen atoms?

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IMPORTANT

MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - Some Basic Concepts of Chemistry>Competitive Thinking>Q 28

1

g

of carbonate

(M_{2} {CO}_{3})

on treatment with excess

HCl

produces

0.01186

mole

{CO}_{2}

. The molar mass of

M_{2} {CO}_{3}

g {mol}^{- 1}

is_________.

The empirical formula of an acid is CH2O2, the probable molecular formula of acid may be_________

Important Questions on Some Basic Concepts of Chemistry

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The empirical formula of an acid is ${CH}_{2} O_{2}$ , the probable molecular formula of acid may be_________