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1009 available questions

Chemistry · Question 121

What is the composition of alloy, German silver?

  1. Cu + Zn + Ni
  2. Cu + Ag + Ni
  3. Cu + Sn 4 Zn + Pb
  4. Al+ Cu + Mg + Mn
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Correct answer: A

Cu + Zn + Ni

Chemistry · Question 122

What will be the product when phenol reacts with concentrated HNO,?

  1. Picric acid
  2. Para-Nitropheno
  3. Ortho-Nitrophenol
  4. All of the above
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Correct answer: A

Picric acid

Chemistry · Question 123

Heat exchanged between the system and surrounding at constant volumne is show by the realation?

  1. ΔH=qv+w
  2. ΔE=(q)v
  3. ΔH=(q)v
  4. ΔE=(q)v+PV
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Correct answer: B

ΔE=(q)v

Chemistry · Question 124

Lower boiling point of ether then water is due to the reason?

  1. Ether has strong intermolecular forces
  2. Water has weak H-bonding
  3. Ether has weak intermolecular forcess
  4. Water has lower vapour pressure
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Correct answer: C

Ether has weak intermolecular forcess

Chemistry · Question 125

What is the coordination number of Cu metal in [Cu(NH3)4] SO4?

  1. 3
  2. 4
  3. 6
  4. 1
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Correct answer: B

4

Chemistry · Question 126

SN1 reactions have which of the following specie formed and consumed in the reaction?

  1. Transition state
  2. Intermediate
  3. Carbanion
  4. Carbene
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Correct answer: B

Intermediate

Chemistry · Question 127

Which of the following contains the same number of molecules as 22 gram of carbon
dioxide?

  1. 9g of water
  2. 2g of hydrogen gas
  3. 32g of oxygen gas
  4. 71g of chlorine gas
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Correct answer: A

9g of water

Chemistry · Question 128

In Down Cell anode is made of

  1. Graphite
  2. Copper
  3. Iron
  4. Silver
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Correct answer: A

Graphite

Chemistry · Question 129

Different kind of atoms of the same element are called isotope having different__________but same ______properties

  1. physical, atomic
  2. physical, chemical
  3. chemical, physical
  4. chemical, atomic
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Correct answer: B

physical, chemical

Chemistry · Question 130

Aldehydes are converted into ________________ when undergoes Wolff Kishner reduction?

  1. Alkenes
  2. Alkanes
  3. Alkynes
  4. Alcohols
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Correct answer: B

Alkanes