241 ) What is the chemical name of Baking Soda?
(a) Sodium bicarbonate
(b) Sodium Nitrate
(c) Sodium Carbonate
(d) Potassium
The Answer Is: (a) Sodium bicarbonate
242 ) Milk lacks in one important nutrient. Which one?
(a) Calcium
(b) Iron
(c) Potassium
(d) Protein
The Answer Is: (b) Iron
243) Ripening of fruits is hastened by which of the following gases?
(a) Hydrogen
(b) Carbon dioxide
(c) Methane
(d) Ethylene
The Answer Is: (d) Ethylene
244 ) Iron articles rust because of the formation of
(a) Ferrous chloride
(b) A mixture of ferrous and ferric hydroxide
(c) Sodium carbonate
(d) Ferric chloride
The Answer Is: (b) A mixture of ferrous and ferric hydroxide
245 ) Gunpowder consists of
(a) 75% potassium nitrite + 15% charcoal + 10% sulphur
(b) 75% potassium nitrite + 10% charcoal + 15% sulphur
(c) 75% potassium nitrate + 10% charcoal + 15% sulphur
(d) 75% potassium nitrate + 15% charcoal + 15% sulphur
The Answer Is: (c) 75% potassium nitrate + 10% charcoal + 15% sulphur
246 ) X-rays are produced when a stream of electrons in an X-ray tube
(a) Hits the glass wall of the tube
(b) Strikes a metal target
(c) Passes through a strong magnetic field
(d) None of these
The Answer Is: (b) Strikes a metal target
247 ) In the periodic table, elements have been arranged
(a) In order of increasing volume
(b) In order of increasing atomic number
(c) In order of increasing atomic weights
(d) In order of increasing density
The Answer Is: (b) In order of increasing atomic number
248 ) Which group of elements in the periodic table shows the highest first ionization potential?
(a) Left-hand top corner
(b) Left-hand bottom corner
(c) Right-hand top corner
(d) Right-hand bottom corner
The Answer Is: (c) Right-hand top corner
249 ) When we move from left to right in the second period, the atomic volume of the element
(a) Increases
(b) Increases with constant state
(c) Decreases
(d) None of these
The Answer Is: (c) Decreases
250 ) Generally in a given period in the periodic table, as we move from left to right, the electropositive character of elements
(a) Increases
(b) Decreases
(c) Neither increases nor decreases
(d) Decreases then increases
The Answer Is: (b) Decreases
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