Which among the following qualities of iron ore is best based upon iron content?
[A] Magnetite
[B] Hematite
[C] Limonite
[D] Siderite

Highest percentage of nitrogen is found in which among the following fertilizers among the given options?
[A] Calcium ammonium nitrate
[B] Ammonium nitrate
[C] Calcium nitrate
[D] Urea

Which among the following would cause the bright red color due to bursting of crackers?
[A] Strontium
[B] Sodium
[C] Sulphur
[D] Magnesium

Identify the thermosetting plastic from the given options:
[A] Polythene
[B] Bakelite
[C] Polyvincychloride
[D] Casseine

Which among the following happens in an oxidation reaction ?
[A] Electrons are gained
[B] Electrons are lost
[C] Protons are gained
[D] Protons are lost

Which among the following is the unit of the scale used for measurement of the spicy heat of a chili pepper?
[A] Smith
[B] Wright
[C] Orville
[D] Scoville

1, 2, 5, 7, 11,______,17
a. 12        b. 13
c. 14        d. 15

1, 8, 27,____,125
a. 37        b. 47
c. 54        d. 64

6, 12, 21, 33,____
a. 38         b. 40
c. 45         d. 48

2, 20,____,110, 182
a. 56         b. 72
c. 90         d. 96

81, 9, 64,____,49, 7
a. 8           b. 9
c. 10         d. 11