RRB GROUP D SCIENCE QUIZ

Question 1:

The number of water molecules associated with copper sulphate molecule to form crystals is- ?

2

4

5

6

Question 2:

Which yeast is used in the commercial production of ethanol?

Candida albicans

Saccharomyces cerevisiae

Candida sloughi

Leucosporodium phrigidium

Question 3:

Which of the following options is/are correct for brine is-

Aqueous solution of chlorides

Saturated solution of NaCl

Aqueous solution of HCl

Common name of bleaching powder

Question 4:

Ozone layer is present in which layer of the atmosphere?

Troposphere

Stratosphere

Upper part of Ionosphere

Lower part of Exosphere

Question 5:

A temperature of 295 K is equivalent to approximately:

92°F

37.5 °F

71.6 °F

98.7°F

Question 6:

Which one of the following properties decreases across the periodic table from left to right and increases from top to bottom?

Ionization energy

Electron affinity

Electronegativity

Atomic radius

Question 7:

Which one of the following laws of electromagnetism does not give the direction of the magnetic field?

Right-hand thumb rule

Fleming's left-hand rule

Fleming's right-hand rule

Faraday's law of electromagnetic induction

Question 8:

In which of the following do we find the hepatic portal system?

All mammals

All amniotes

All vertebrates

Higher invertebrates

Question 9:

Which of the following is the lifespan of Red & White blood cells respectively?

100 days, 60 days

110 days, less than 10 days

120 days, between 10-20 days

None of these

Question 10:

Deficiency of vitamin ‘X’ causes bleeding of gums. This vitamin is essential for absorption of mineral ‘Y’ and ‘X’ is found in food ‘Z”. Identify X, Y and Z.

X-vitamin B, Y-calcium, Z-green leafy vegetables

X-vitamin A, Y-phosphorous, Z-poultry products

X-vitamin D, Y-calcium, Z-milk product

X-vitamin C, Y-iron, Z-citrus fruits