Other Chemistry · JEE Main previous year questions

2019 55 questions

1. Q822019 · 11 Jan 2019 · Shift 2

   The higher concentration of which gas in air can cause stiffness of flower buds?

   1. A.$\mathrm{C}{\mathrm{O}}_2$
   2. B.$\mathrm{S}{\mathrm{O}}_2$
   3. C.$\mathrm{N}{\mathrm{O}}_2$
   4. D.$\mathrm{CO}$
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   Answer: B

2. Q852019 · 11 Jan 2019 · Shift 2

   Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :

   1. A.acid rain
   2. B.soil pollution
   3. C.global warming
   4. D.water pollution
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   Answer: A

3. Q652019 · 9 Jan 2019 · Shift 1

   Which amongst the following is the strongest acid ?

   1. A.$\mathrm{CHB}{\mathrm{r}}_3$
   2. B.$\mathrm{CH}{\mathrm{I}}_3$
   3. C.$\mathrm{CH}(\mathrm{CN}{)}_3$
   4. D.$\mathrm{CHC}{\mathrm{l}}_3$
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   Answer: C

4. Q812019 · 9 Jan 2019 · Shift 1

   The one that is extensively used as a piezoelectric material is :

   1. A.tridymite
   2. B.amorphous silica
   3. C.quartz
   4. D.mica
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   Answer: C

5. Q882019 · 9 Jan 2019 · Shift 1

   The isotopes of hydrogen are :

   1. A.Tritium and protium only
   2. B.Protium and Deuterium only
   3. C.Protium, deuterium and tritium
   4. D.Deuterium and tritium only
   Show answer

   Answer: C