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TLS Online TPP Program

#Question id: 15604

The bacteria which cause septicaemia are fast becoming resistant to the antibiotics used for controlling them. Which one of the following explanations fits best?

#XL - S Microbiology
  1. Each and every individual bacterium, in order to survive, develops a resistance to the antibiotic when exposed to it, and passes that resistance on to future generations.
  2. Only some bacteria, in order to survive, develop a resistance to the antibiotic when exposed to it, and pass that resistance on to future generations.
  3. A few bacteria have a natural heritable resistance to the antibiotic, so they survive when exposed to it, and pass that resistance on to future generations.
  4. All the bacteria have a natural heritable resistance to the antibiotic, so they survive when exposed to it, and pass that resistance on to future generations
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TLS Online TPP Program

#Question id: 19644

#XL - P Chemistry

When acetylene is treated with HBr, the product is ———-
TLS Online TPP Program

#Question id: 19645

#XL - P Chemistry

The dihedral angle in the staggered conformation of C2H6 is
TLS Online TPP Program

#Question id: 19646

#XL - P Chemistry

Bond length of (I) ethane, (II) ethene, (III) acetylene and (IV) benzene follows the order:
TLS Online TPP Program

#Question id: 19647

#XL - P Chemistry

Which of the following participate in the sulphonation of benzene?
TLS Online TPP Program

#Question id: 19648

#XL - P Chemistry

Which one of the following is not an isomer of 3-Methylbut-1-yne?
TLS Online TPP Program

#Question id: 19649

#XL - P Chemistry

Which of the following can be used as the halide component of a Friedel craft reaction?