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1009 available questions

Chemistry · Question 41

Alkali metals group lies in ________________?

  1. d-block
  2. s-block
  3. f-block
  4. P-block
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Correct answer: B

s-block

Chemistry · Question 42

Physical methods of finding the rate of reaction always involve:

  1. A catalyst
  2. A graph
  3. A caculating software
  4. None of These
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Correct answer: B

A graph

Chemistry · Question 43

Which of the following shows marked deviation from ideal behaviour at a given temperature and pressure?

  1. CO2
  2. He
  3. N2
  4. H2
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Correct answer: A

CO2

Chemistry · Question 44

A very small value of Kc depicts

  1. No Reaction
  2. Backward Reaction
  3. Little Forward Reaction
  4. Complete Reaction
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Correct answer: C

Little Forward Reaction

Chemistry · Question 45

Molecular mass of the compound is 60 and its empirical formula is CH,0. What will be
the molecular formula of the compound?

  1. C6H22O2
  2. C2H1O2
  3. C2H2D2
  4. C2H2O2
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Correct answer: B

C2H1O2

Chemistry · Question 46

The electrophile which is considered to be the active agent in the nitration of benzene is:

  1. NO+2
  2. NO-2
  3. NO+
  4. NHO+2
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Correct answer: A

NO+2

Chemistry · Question 47

In which of the following water evaporate earlier?

  1. Cup
  2. Saucepan
  3. Glass
  4. Small bowl
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Correct answer: B

Saucepan

Chemistry · Question 48

For 3rd order reactions the half-life is

  1. inversely proportional to square of concentration
  2. directly proportional to cube of concentration
  3. inversely proportional to conentration
  4. directly proportional to conentration
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Correct answer: A

inversely proportional to square of concentration

Chemistry · Question 49

The linear arrangement of amino acid units in proteins is called:

  1. Secondary structure
  2. Tertiary structure
  3. Primary structure
  4. Quatemary structure
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Correct answer: C

Primary structure

Chemistry · Question 50

Carbaon is.

  1. trivalent
  2. Tertavalent
  3. Monovalent
  4. Pentavalent
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Correct answer: B

Tertavalent